Patent
US 8,580,432NANO GRAPHENE REINFORCED NANOCOMPOSITE PARTICLES FOR LITHIUM BATTERY ELECTRODES
Aruna Zhamu, Bor Z. Jang, Jinjun Shi
US
Copyright © 2026 Matter42. All rights reserved.
Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 Schematic of a prior art anode active material (e.g., Si particles) that tends to undergo pulverization during battery cycling.
FIG.2 Two preferred structures of the presently invented solid nanocomposite particles: (A) A spherical nanocomposite particle comprising electro-active …
FIG.3 A prior art anode active material in the form of Si nano-wires that were catalytically grown on a surface of a current collector [Ref. 28]: (A) Si …
FIG.4 The lateral dimensions (average length and width) of NGPs appear to dictate the diameters of the NGP-containing nanocomposite solid particles after …
FIG.5 The half-cell cycling behaviors of Sample 1 (NGP-reinforced carbon matrix-protected Si nano particles), Comparative Sample l a (carbon-protected Si nano …
FIG.6 Long cycle life of Sample 1.
FIG.7 Cycling behaviors of S n particles dispersed in NGP-reinforced and un-reinforced Li₂ O matrix.. 5
FIG.8 Cycling behaviors of Sample 6A (45% Si nanowires, 22% NGPs, and 33% carbon matrix, Comparative Sample 6B (approximately 46% Si nanowires, 21% carbon …
FIG.9 Cycling responses of two lithium ion phosphate-based nanocomposite electrodes. 20
FIG. 10, indicate that a protective carbon matrix can effectively improve the cycling stability of y-LiV₂ 05 nano-rod-based cathodes and that the presence of …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A so li d nanocomposite particle composition for li thium metal or li thium i on battery electrode app li cations, said composition compris ing (A) An electrode active material in a form of fine particles, rods, wires, fibers, or tubes with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 1 nm, and (C) A protective matrix material re in forced by said nano graphene platelets which are not formed in situ from said matrix material, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective mat n x mate n al, and said nano graphene platelets occupy a weight fraction w g of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction wa of 1% to 90 % of the total nanocomposite weight, and said matrix material occup i es a weight fraction wm of at least 2 % of the total nanocomposite weight with wg + w a + wm = 1 and where in said matrix mate n al is selected from a polymer, meso-phase carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal oxide, metal hyd n de, metal ni tride, metal carbide, metal sulfide, orga ni c material, or a comb in ation thereof
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle has a substantially spherical or el li pso i dal shape
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle is of substantially sphe n cal or el li pso i dal shape with a dimension less than 10 gm
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle is of substantially sphe n cal or el li pso i dal shape with a dimension less than 5 gm 2 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment
The so li d nanocomposite particle composition of claim 1, where in said matrix material is li thium ion conductive original
The so li d nanocomposite particle composition as defined in claim 1, where in said nano graphene platelets are obta in ed from exfo li ation and platelet separation of a natural graphite, synthetic graphite, highly oriented pyrolytic graphite, graphite fiber, carbon fiber, carbon nanofiber, graphitic nano-fiber, spherical graphite or graphite globule, meso-phase micro-bead, meso-phase pitch, graphitic coke, or graphitized polyme n c carbon
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises fine rods, wires, fibers, or tubes with a dimension smaller than 0 5 gm
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises fine rods, wires, fibers, or tubes with a dimension smaller than 200 n m
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises nano rods, nano wires, nano fibers, or nano tubes with a dimension smaller than 100 n m
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises nano rods, nano wires, nano fibers, or nano tubes of s ili con, germa ni um, or t in with a diameter smaller than 100 n m
The so li d nanocomposite particle of claim 1 where in the electrode active material comp n ses an anode active material selected from the group consist in g of a) s ili con (S i), germa ni um (Ge), t in (Sn), lead (Pb), antimony (Sb), bismuth (Bi), z in c (Zn), alum in um (Al), 3 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment and cadmium (Cd), b) alloys or in termetal li c compounds of S i, Ge, S n, Pb, Sb, B i, Zn, Al, or Cd with other elements, where in said alloys or compounds are stoich i omet n c or non- stoich i ometric, c) oxides, carbides, nitn des, sulfides, phosphides, sele ni des, and tellurides of Si, Ge, S n, Pb, Sb, B i, Zn, Al, Fe, or Cd, and their mixtures or composites, and d),ombin ations thereof
The so li d nanocomposite particle composition of claim 1 where in the electrode i ctive material comprises a cathode active material selected from the group consist in g of li thium cobalt oxide, doped li thium cobalt oxide, li thium ni ckel oxide, doped li thium ni ckel oxide, li thium manganese oxide, doped li thium manganese oxide, li thium i ron phosphate, li thium manganese phosphate, li thium vanadium oxide, doped li thium vanadium oxide, li thium vanadium phosphate, li thium transition metal phosphate, li thium mixed-metal phosphates, metal sulfides, metal phosphides, metal haloge ni des, and comb in ations thereof
The so li d nanocomposite particle composition of claim 1 where in jai d nano graphene platelets occupy a weight fraction w g of 2 % to 50 % of the total l anocomposite weight, said electrode active material occup i es a weight fraction w a of 10% to 80% of the total nanocomposite weight, and said mat n x mate n al occup i es a weight fraction wm of 4 % to 30 % of the total nanocomposite weight with w g+wa +wm =1
A li thium metal battery comp nsin g a li thium metal anode, a cathode, a separator disposed between said anode and said cathode, an electrolyte in ioni c contact with said anode in d said cathode, where in said cathode comprises a nanocomposite so li d particle as defined in claim 1
A li thium secondary battery compris in g an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said cathode, where in said anode comprises a so li d nanocomposite particle of claim 1 as an anode active material
A li thium secondary battery compris in g an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said 4 Appli cation No 12/315,555 Attorney Docket No 075213-00068US Amendment cathode, where in said cathode comprises a so li d nanocomposite particle of claim 1 as a cathode active material
canceled
(Cancelled canceled
canceled
canceled
canceled
canceled
A so li d nanocomposite particle composition for li thium metal or li thium i on battery cathode app li cations, said composition compris in g (A) A cathode active material in a form of fine rods, wires, or fibers, with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 10 nm, and (C) A protective matrix material re in forced by said nano graphene platelets, where in said protective mat n x material is selected from a polymer, polymeric carbon, amorphous carbon, meso-phase carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal oxide, metal hyd n de, metal ni tride, metal carbide, metal sulfide, orga ni c material, or a comb in ation thereof and, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective matrix material, and said nano graphene platelets occupy a weight fraction wg of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction w a of 1% to % of the total nanocomposite weight, and 5 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment said mat n x mate n al occup i es a weight fraction w m of at least 2 % of the total nanocomposite weight with w g + wa+ wm = 1
A so li d nanocomposite particle composition for li thium metal or li thium i on battery electrode app li cations, said composition comp nsin g (A) An electrode active material in a form of fine particles, rods, wires, fibers, or tubes with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 10 nm, and (C) A protective matrix material re in forced by said nano graphene platelets, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective mat n x material, and said nano graphene platelets occupy a weight fraction w g of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction w a of 1% to % of the total nanocomposite weight, and said mat n x mate n al occup i es a weight fraction wm of at least 2 % of the total nanocomposite weight with w g + w a + wm = 1, where in the protective mat n x is selected from a polymer, meso-phase carbon, coke, metal oxide, metal hydride, metal nitri de, metal carbide, metal sulfide, orga ni c mate n al, or a comb in ation thereof, and the electrode active mate nal comp n ses an anode active mate n al selected from the group consist in g of a) germa nium (Ge), t in (Sn), lead (Pb), antimony (Sb), bismuth (Bi), z in c (Zn), alum in um (Al), and cadmium (Cd), b) alloys or in termetal li c compounds of S i, Ge, Sn, Pb, Sb, B i, Zn, Al, or Cd with other elements, where in said alloys or compounds are stoich i ometric or non- stoich i ometric, c) oxides, carbides, ni trides, sulfides, phosphides, sele ni des, and tellurides of Si, Ge, Sn, Pb, Sb, B i, Zn, Al, Fe, or Cd, and their mixtures or composites, and d) comb in ations thereof 6
Layer stacks claimed or described, ordered top of device to substrate.
solid nanocomposite particle for lithium battery electrode
lithium metal battery
lithium secondary battery with nanocomposite anode
lithium secondary battery with nanocomposite cathode
Materials described outside the worked examples.
electrode active material
nano graphene platelets
protective matrix material
silicon
Si
germanium
Ge
tin
Sn
lead
Pb
antimony
Sb
bismuth
Bi
zinc
Zn
aluminum
Al
cadmium
Cd
lithium cobalt oxide
LiCoO₂
lithium nickel oxide
LiNiO₂
lithium manganese oxide
LiMnO₂
lithium iron phosphate
LiFePO₄
lithium manganese phosphate
LiMnPO₄
lithium vanadium oxide
lithium vanadium phosphate
amorphous carbon
polymeric carbon
meso-phase carbon
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
anode specific capacity (claim minimum) | 500 mAh/g | — |
anode specific capacity (claim minimum) | 1000 mAh/g | — |
anode specific capacity (claim minimum) | 2000 mAh/g | — |
anode reversible specific capacity after 100 cycles (claim minimum) | 1500 mAh/g | — |
anode reversible specific capacity after 500 cycles (claim minimum) | 1000 mAh/g | — |
Thickness | 85–150 nm | — |
Duration | 30–120 s | — |
Thickness | 1–2 mm | — |
Thickness | 30–50 nm | — |
Thickness | 40–120 nm | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 500 nm | — |
Thickness | ≤ 200 nm | — |
Thickness | ≤ 50 nm | — |
Thickness | ≤ 10 nm | — |
Related documents with shared materials, methods, properties, or citations.
Supercritical Fluid Production of Graphene-Based Supercapacitor Electrode from Coke or Coal
Large-grain graphene thin film current collector and secondary batteries containing same
GRAPHENE-ENABLED SELENIUM CATHODE ACTIVE MATERIAL FOR AN ALKALI METAL-SELENIUM SECONDARY BATTERY
Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 Schematic of a prior art anode active material (e.g., Si particles) that tends to undergo pulverization during battery cycling.
FIG.2 Two preferred structures of the presently invented solid nanocomposite particles: (A) A spherical nanocomposite particle comprising electro-active …
FIG.3 A prior art anode active material in the form of Si nano-wires that were catalytically grown on a surface of a current collector [Ref. 28]: (A) Si …
FIG.4 The lateral dimensions (average length and width) of NGPs appear to dictate the diameters of the NGP-containing nanocomposite solid particles after …
FIG.5 The half-cell cycling behaviors of Sample 1 (NGP-reinforced carbon matrix-protected Si nano particles), Comparative Sample l a (carbon-protected Si nano …
FIG.6 Long cycle life of Sample 1.
FIG.7 Cycling behaviors of S n particles dispersed in NGP-reinforced and un-reinforced Li₂ O matrix.. 5
FIG.8 Cycling behaviors of Sample 6A (45% Si nanowires, 22% NGPs, and 33% carbon matrix, Comparative Sample 6B (approximately 46% Si nanowires, 21% carbon …
FIG.9 Cycling responses of two lithium ion phosphate-based nanocomposite electrodes. 20
FIG. 10, indicate that a protective carbon matrix can effectively improve the cycling stability of y-LiV₂ 05 nano-rod-based cathodes and that the presence of …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A so li d nanocomposite particle composition for li thium metal or li thium i on battery electrode app li cations, said composition compris ing (A) An electrode active material in a form of fine particles, rods, wires, fibers, or tubes with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 1 nm, and (C) A protective matrix material re in forced by said nano graphene platelets which are not formed in situ from said matrix material, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective mat n x mate n al, and said nano graphene platelets occupy a weight fraction w g of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction wa of 1% to 90 % of the total nanocomposite weight, and said matrix material occup i es a weight fraction wm of at least 2 % of the total nanocomposite weight with wg + w a + wm = 1 and where in said matrix mate n al is selected from a polymer, meso-phase carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal oxide, metal hyd n de, metal ni tride, metal carbide, metal sulfide, orga ni c material, or a comb in ation thereof
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle has a substantially spherical or el li pso i dal shape
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle is of substantially sphe n cal or el li pso i dal shape with a dimension less than 10 gm
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle is of substantially sphe n cal or el li pso i dal shape with a dimension less than 5 gm 2 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment
The so li d nanocomposite particle composition of claim 1, where in said matrix material is li thium ion conductive original
The so li d nanocomposite particle composition as defined in claim 1, where in said nano graphene platelets are obta in ed from exfo li ation and platelet separation of a natural graphite, synthetic graphite, highly oriented pyrolytic graphite, graphite fiber, carbon fiber, carbon nanofiber, graphitic nano-fiber, spherical graphite or graphite globule, meso-phase micro-bead, meso-phase pitch, graphitic coke, or graphitized polyme n c carbon
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises fine rods, wires, fibers, or tubes with a dimension smaller than 0 5 gm
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises fine rods, wires, fibers, or tubes with a dimension smaller than 200 n m
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises nano rods, nano wires, nano fibers, or nano tubes with a dimension smaller than 100 n m
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises nano rods, nano wires, nano fibers, or nano tubes of s ili con, germa ni um, or t in with a diameter smaller than 100 n m
The so li d nanocomposite particle of claim 1 where in the electrode active material comp n ses an anode active material selected from the group consist in g of a) s ili con (S i), germa ni um (Ge), t in (Sn), lead (Pb), antimony (Sb), bismuth (Bi), z in c (Zn), alum in um (Al), 3 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment and cadmium (Cd), b) alloys or in termetal li c compounds of S i, Ge, S n, Pb, Sb, B i, Zn, Al, or Cd with other elements, where in said alloys or compounds are stoich i omet n c or non- stoich i ometric, c) oxides, carbides, nitn des, sulfides, phosphides, sele ni des, and tellurides of Si, Ge, S n, Pb, Sb, B i, Zn, Al, Fe, or Cd, and their mixtures or composites, and d),ombin ations thereof
The so li d nanocomposite particle composition of claim 1 where in the electrode i ctive material comprises a cathode active material selected from the group consist in g of li thium cobalt oxide, doped li thium cobalt oxide, li thium ni ckel oxide, doped li thium ni ckel oxide, li thium manganese oxide, doped li thium manganese oxide, li thium i ron phosphate, li thium manganese phosphate, li thium vanadium oxide, doped li thium vanadium oxide, li thium vanadium phosphate, li thium transition metal phosphate, li thium mixed-metal phosphates, metal sulfides, metal phosphides, metal haloge ni des, and comb in ations thereof
The so li d nanocomposite particle composition of claim 1 where in jai d nano graphene platelets occupy a weight fraction w g of 2 % to 50 % of the total l anocomposite weight, said electrode active material occup i es a weight fraction w a of 10% to 80% of the total nanocomposite weight, and said mat n x mate n al occup i es a weight fraction wm of 4 % to 30 % of the total nanocomposite weight with w g+wa +wm =1
A li thium metal battery comp nsin g a li thium metal anode, a cathode, a separator disposed between said anode and said cathode, an electrolyte in ioni c contact with said anode in d said cathode, where in said cathode comprises a nanocomposite so li d particle as defined in claim 1
A li thium secondary battery compris in g an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said cathode, where in said anode comprises a so li d nanocomposite particle of claim 1 as an anode active material
A li thium secondary battery compris in g an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said 4 Appli cation No 12/315,555 Attorney Docket No 075213-00068US Amendment cathode, where in said cathode comprises a so li d nanocomposite particle of claim 1 as a cathode active material
canceled
(Cancelled canceled
canceled
canceled
canceled
canceled
A so li d nanocomposite particle composition for li thium metal or li thium i on battery cathode app li cations, said composition compris in g (A) A cathode active material in a form of fine rods, wires, or fibers, with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 10 nm, and (C) A protective matrix material re in forced by said nano graphene platelets, where in said protective mat n x material is selected from a polymer, polymeric carbon, amorphous carbon, meso-phase carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal oxide, metal hyd n de, metal ni tride, metal carbide, metal sulfide, orga ni c material, or a comb in ation thereof and, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective matrix material, and said nano graphene platelets occupy a weight fraction wg of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction w a of 1% to % of the total nanocomposite weight, and 5 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment said mat n x mate n al occup i es a weight fraction w m of at least 2 % of the total nanocomposite weight with w g + wa+ wm = 1
A so li d nanocomposite particle composition for li thium metal or li thium i on battery electrode app li cations, said composition comp nsin g (A) An electrode active material in a form of fine particles, rods, wires, fibers, or tubes with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 10 nm, and (C) A protective matrix material re in forced by said nano graphene platelets, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective mat n x material, and said nano graphene platelets occupy a weight fraction w g of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction w a of 1% to % of the total nanocomposite weight, and said mat n x mate n al occup i es a weight fraction wm of at least 2 % of the total nanocomposite weight with w g + w a + wm = 1, where in the protective mat n x is selected from a polymer, meso-phase carbon, coke, metal oxide, metal hydride, metal nitri de, metal carbide, metal sulfide, orga ni c mate n al, or a comb in ation thereof, and the electrode active mate nal comp n ses an anode active mate n al selected from the group consist in g of a) germa nium (Ge), t in (Sn), lead (Pb), antimony (Sb), bismuth (Bi), z in c (Zn), alum in um (Al), and cadmium (Cd), b) alloys or in termetal li c compounds of S i, Ge, Sn, Pb, Sb, B i, Zn, Al, or Cd with other elements, where in said alloys or compounds are stoich i ometric or non- stoich i ometric, c) oxides, carbides, ni trides, sulfides, phosphides, sele ni des, and tellurides of Si, Ge, Sn, Pb, Sb, B i, Zn, Al, Fe, or Cd, and their mixtures or composites, and d) comb in ations thereof 6
Layer stacks claimed or described, ordered top of device to substrate.
solid nanocomposite particle for lithium battery electrode
lithium metal battery
lithium secondary battery with nanocomposite anode
lithium secondary battery with nanocomposite cathode
Materials described outside the worked examples.
electrode active material
nano graphene platelets
protective matrix material
silicon
Si
germanium
Ge
tin
Sn
lead
Pb
antimony
Sb
bismuth
Bi
zinc
Zn
aluminum
Al
cadmium
Cd
lithium cobalt oxide
LiCoO₂
lithium nickel oxide
LiNiO₂
lithium manganese oxide
LiMnO₂
lithium iron phosphate
LiFePO₄
lithium manganese phosphate
LiMnPO₄
lithium vanadium oxide
lithium vanadium phosphate
amorphous carbon
polymeric carbon
meso-phase carbon
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
anode specific capacity (claim minimum) | 500 mAh/g | — |
anode specific capacity (claim minimum) | 1000 mAh/g | — |
anode specific capacity (claim minimum) | 2000 mAh/g | — |
anode reversible specific capacity after 100 cycles (claim minimum) | 1500 mAh/g | — |
anode reversible specific capacity after 500 cycles (claim minimum) | 1000 mAh/g | — |
Thickness | 85–150 nm | — |
Duration | 30–120 s | — |
Thickness | 1–2 mm | — |
Thickness | 30–50 nm | — |
Thickness | 40–120 nm | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 500 nm | — |
Thickness | ≤ 200 nm | — |
Thickness | ≤ 50 nm | — |
Thickness | ≤ 10 nm | — |
Related documents with shared materials, methods, properties, or citations.
Supercritical Fluid Production of Graphene-Based Supercapacitor Electrode from Coke or Coal
Large-grain graphene thin film current collector and secondary batteries containing same
GRAPHENE-ENABLED SELENIUM CATHODE ACTIVE MATERIAL FOR AN ALKALI METAL-SELENIUM SECONDARY BATTERY
Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 Schematic of a prior art anode active material (e.g., Si particles) that tends to undergo pulverization during battery cycling.
FIG.2 Two preferred structures of the presently invented solid nanocomposite particles: (A) A spherical nanocomposite particle comprising electro-active …
FIG.3 A prior art anode active material in the form of Si nano-wires that were catalytically grown on a surface of a current collector [Ref. 28]: (A) Si …
FIG.4 The lateral dimensions (average length and width) of NGPs appear to dictate the diameters of the NGP-containing nanocomposite solid particles after …
FIG.5 The half-cell cycling behaviors of Sample 1 (NGP-reinforced carbon matrix-protected Si nano particles), Comparative Sample l a (carbon-protected Si nano …
FIG.6 Long cycle life of Sample 1.
FIG.7 Cycling behaviors of S n particles dispersed in NGP-reinforced and un-reinforced Li₂ O matrix.. 5
FIG.8 Cycling behaviors of Sample 6A (45% Si nanowires, 22% NGPs, and 33% carbon matrix, Comparative Sample 6B (approximately 46% Si nanowires, 21% carbon …
FIG.9 Cycling responses of two lithium ion phosphate-based nanocomposite electrodes. 20
FIG. 10, indicate that a protective carbon matrix can effectively improve the cycling stability of y-LiV₂ 05 nano-rod-based cathodes and that the presence of …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A so li d nanocomposite particle composition for li thium metal or li thium i on battery electrode app li cations, said composition compris ing (A) An electrode active material in a form of fine particles, rods, wires, fibers, or tubes with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 1 nm, and (C) A protective matrix material re in forced by said nano graphene platelets which are not formed in situ from said matrix material, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective mat n x mate n al, and said nano graphene platelets occupy a weight fraction w g of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction wa of 1% to 90 % of the total nanocomposite weight, and said matrix material occup i es a weight fraction wm of at least 2 % of the total nanocomposite weight with wg + w a + wm = 1 and where in said matrix mate n al is selected from a polymer, meso-phase carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal oxide, metal hyd n de, metal ni tride, metal carbide, metal sulfide, orga ni c material, or a comb in ation thereof
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle has a substantially spherical or el li pso i dal shape
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle is of substantially sphe n cal or el li pso i dal shape with a dimension less than 10 gm
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle is of substantially sphe n cal or el li pso i dal shape with a dimension less than 5 gm 2 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment
The so li d nanocomposite particle composition of claim 1, where in said matrix material is li thium ion conductive original
The so li d nanocomposite particle composition as defined in claim 1, where in said nano graphene platelets are obta in ed from exfo li ation and platelet separation of a natural graphite, synthetic graphite, highly oriented pyrolytic graphite, graphite fiber, carbon fiber, carbon nanofiber, graphitic nano-fiber, spherical graphite or graphite globule, meso-phase micro-bead, meso-phase pitch, graphitic coke, or graphitized polyme n c carbon
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises fine rods, wires, fibers, or tubes with a dimension smaller than 0 5 gm
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises fine rods, wires, fibers, or tubes with a dimension smaller than 200 n m
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises nano rods, nano wires, nano fibers, or nano tubes with a dimension smaller than 100 n m
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises nano rods, nano wires, nano fibers, or nano tubes of s ili con, germa ni um, or t in with a diameter smaller than 100 n m
The so li d nanocomposite particle of claim 1 where in the electrode active material comp n ses an anode active material selected from the group consist in g of a) s ili con (S i), germa ni um (Ge), t in (Sn), lead (Pb), antimony (Sb), bismuth (Bi), z in c (Zn), alum in um (Al), 3 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment and cadmium (Cd), b) alloys or in termetal li c compounds of S i, Ge, S n, Pb, Sb, B i, Zn, Al, or Cd with other elements, where in said alloys or compounds are stoich i omet n c or non- stoich i ometric, c) oxides, carbides, nitn des, sulfides, phosphides, sele ni des, and tellurides of Si, Ge, S n, Pb, Sb, B i, Zn, Al, Fe, or Cd, and their mixtures or composites, and d),ombin ations thereof
The so li d nanocomposite particle composition of claim 1 where in the electrode i ctive material comprises a cathode active material selected from the group consist in g of li thium cobalt oxide, doped li thium cobalt oxide, li thium ni ckel oxide, doped li thium ni ckel oxide, li thium manganese oxide, doped li thium manganese oxide, li thium i ron phosphate, li thium manganese phosphate, li thium vanadium oxide, doped li thium vanadium oxide, li thium vanadium phosphate, li thium transition metal phosphate, li thium mixed-metal phosphates, metal sulfides, metal phosphides, metal haloge ni des, and comb in ations thereof
The so li d nanocomposite particle composition of claim 1 where in jai d nano graphene platelets occupy a weight fraction w g of 2 % to 50 % of the total l anocomposite weight, said electrode active material occup i es a weight fraction w a of 10% to 80% of the total nanocomposite weight, and said mat n x mate n al occup i es a weight fraction wm of 4 % to 30 % of the total nanocomposite weight with w g+wa +wm =1
A li thium metal battery comp nsin g a li thium metal anode, a cathode, a separator disposed between said anode and said cathode, an electrolyte in ioni c contact with said anode in d said cathode, where in said cathode comprises a nanocomposite so li d particle as defined in claim 1
A li thium secondary battery compris in g an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said cathode, where in said anode comprises a so li d nanocomposite particle of claim 1 as an anode active material
A li thium secondary battery compris in g an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said 4 Appli cation No 12/315,555 Attorney Docket No 075213-00068US Amendment cathode, where in said cathode comprises a so li d nanocomposite particle of claim 1 as a cathode active material
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(Cancelled canceled
canceled
canceled
canceled
canceled
A so li d nanocomposite particle composition for li thium metal or li thium i on battery cathode app li cations, said composition compris in g (A) A cathode active material in a form of fine rods, wires, or fibers, with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 10 nm, and (C) A protective matrix material re in forced by said nano graphene platelets, where in said protective mat n x material is selected from a polymer, polymeric carbon, amorphous carbon, meso-phase carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal oxide, metal hyd n de, metal ni tride, metal carbide, metal sulfide, orga ni c material, or a comb in ation thereof and, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective matrix material, and said nano graphene platelets occupy a weight fraction wg of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction w a of 1% to % of the total nanocomposite weight, and 5 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment said mat n x mate n al occup i es a weight fraction w m of at least 2 % of the total nanocomposite weight with w g + wa+ wm = 1
A so li d nanocomposite particle composition for li thium metal or li thium i on battery electrode app li cations, said composition comp nsin g (A) An electrode active material in a form of fine particles, rods, wires, fibers, or tubes with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 10 nm, and (C) A protective matrix material re in forced by said nano graphene platelets, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective mat n x material, and said nano graphene platelets occupy a weight fraction w g of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction w a of 1% to % of the total nanocomposite weight, and said mat n x mate n al occup i es a weight fraction wm of at least 2 % of the total nanocomposite weight with w g + w a + wm = 1, where in the protective mat n x is selected from a polymer, meso-phase carbon, coke, metal oxide, metal hydride, metal nitri de, metal carbide, metal sulfide, orga ni c mate n al, or a comb in ation thereof, and the electrode active mate nal comp n ses an anode active mate n al selected from the group consist in g of a) germa nium (Ge), t in (Sn), lead (Pb), antimony (Sb), bismuth (Bi), z in c (Zn), alum in um (Al), and cadmium (Cd), b) alloys or in termetal li c compounds of S i, Ge, Sn, Pb, Sb, B i, Zn, Al, or Cd with other elements, where in said alloys or compounds are stoich i ometric or non- stoich i ometric, c) oxides, carbides, ni trides, sulfides, phosphides, sele ni des, and tellurides of Si, Ge, Sn, Pb, Sb, B i, Zn, Al, Fe, or Cd, and their mixtures or composites, and d) comb in ations thereof 6
Layer stacks claimed or described, ordered top of device to substrate.
solid nanocomposite particle for lithium battery electrode
lithium metal battery
lithium secondary battery with nanocomposite anode
lithium secondary battery with nanocomposite cathode
Materials described outside the worked examples.
electrode active material
nano graphene platelets
protective matrix material
silicon
Si
germanium
Ge
tin
Sn
lead
Pb
antimony
Sb
bismuth
Bi
zinc
Zn
aluminum
Al
cadmium
Cd
lithium cobalt oxide
LiCoO₂
lithium nickel oxide
LiNiO₂
lithium manganese oxide
LiMnO₂
lithium iron phosphate
LiFePO₄
lithium manganese phosphate
LiMnPO₄
lithium vanadium oxide
lithium vanadium phosphate
amorphous carbon
polymeric carbon
meso-phase carbon
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
anode specific capacity (claim minimum) | 500 mAh/g | — |
anode specific capacity (claim minimum) | 1000 mAh/g | — |
anode specific capacity (claim minimum) | 2000 mAh/g | — |
anode reversible specific capacity after 100 cycles (claim minimum) | 1500 mAh/g | — |
anode reversible specific capacity after 500 cycles (claim minimum) | 1000 mAh/g | — |
Thickness | 85–150 nm | — |
Duration | 30–120 s | — |
Thickness | 1–2 mm | — |
Thickness | 30–50 nm | — |
Thickness | 40–120 nm | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 500 nm | — |
Thickness | ≤ 200 nm | — |
Thickness | ≤ 50 nm | — |
Thickness | ≤ 10 nm | — |
Related documents with shared materials, methods, properties, or citations.
Supercritical Fluid Production of Graphene-Based Supercapacitor Electrode from Coke or Coal
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GRAPHENE-ENABLED SELENIUM CATHODE ACTIVE MATERIAL FOR AN ALKALI METAL-SELENIUM SECONDARY BATTERY
Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 Schematic of a prior art anode active material (e.g., Si particles) that tends to undergo pulverization during battery cycling.
FIG.2 Two preferred structures of the presently invented solid nanocomposite particles: (A) A spherical nanocomposite particle comprising electro-active …
FIG.3 A prior art anode active material in the form of Si nano-wires that were catalytically grown on a surface of a current collector [Ref. 28]: (A) Si …
FIG.4 The lateral dimensions (average length and width) of NGPs appear to dictate the diameters of the NGP-containing nanocomposite solid particles after …
FIG.5 The half-cell cycling behaviors of Sample 1 (NGP-reinforced carbon matrix-protected Si nano particles), Comparative Sample l a (carbon-protected Si nano …
FIG.6 Long cycle life of Sample 1.
FIG.7 Cycling behaviors of S n particles dispersed in NGP-reinforced and un-reinforced Li₂ O matrix.. 5
FIG.8 Cycling behaviors of Sample 6A (45% Si nanowires, 22% NGPs, and 33% carbon matrix, Comparative Sample 6B (approximately 46% Si nanowires, 21% carbon …
FIG.9 Cycling responses of two lithium ion phosphate-based nanocomposite electrodes. 20
FIG. 10, indicate that a protective carbon matrix can effectively improve the cycling stability of y-LiV₂ 05 nano-rod-based cathodes and that the presence of …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A so li d nanocomposite particle composition for li thium metal or li thium i on battery electrode app li cations, said composition compris ing (A) An electrode active material in a form of fine particles, rods, wires, fibers, or tubes with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 1 nm, and (C) A protective matrix material re in forced by said nano graphene platelets which are not formed in situ from said matrix material, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective mat n x mate n al, and said nano graphene platelets occupy a weight fraction w g of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction wa of 1% to 90 % of the total nanocomposite weight, and said matrix material occup i es a weight fraction wm of at least 2 % of the total nanocomposite weight with wg + w a + wm = 1 and where in said matrix mate n al is selected from a polymer, meso-phase carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal oxide, metal hyd n de, metal ni tride, metal carbide, metal sulfide, orga ni c material, or a comb in ation thereof
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle has a substantially spherical or el li pso i dal shape
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle is of substantially sphe n cal or el li pso i dal shape with a dimension less than 10 gm
The so li d nanocomposite particle composition of claim 1, where in said so lid nanocomposite particle is of substantially sphe n cal or el li pso i dal shape with a dimension less than 5 gm 2 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment
The so li d nanocomposite particle composition of claim 1, where in said matrix material is li thium ion conductive original
The so li d nanocomposite particle composition as defined in claim 1, where in said nano graphene platelets are obta in ed from exfo li ation and platelet separation of a natural graphite, synthetic graphite, highly oriented pyrolytic graphite, graphite fiber, carbon fiber, carbon nanofiber, graphitic nano-fiber, spherical graphite or graphite globule, meso-phase micro-bead, meso-phase pitch, graphitic coke, or graphitized polyme n c carbon
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises fine rods, wires, fibers, or tubes with a dimension smaller than 0 5 gm
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises fine rods, wires, fibers, or tubes with a dimension smaller than 200 n m
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises nano rods, nano wires, nano fibers, or nano tubes with a dimension smaller than 100 n m
The so li d nanocomposite particle composition as defined in claim 1, where in said electrode active material comprises nano rods, nano wires, nano fibers, or nano tubes of s ili con, germa ni um, or t in with a diameter smaller than 100 n m
The so li d nanocomposite particle of claim 1 where in the electrode active material comp n ses an anode active material selected from the group consist in g of a) s ili con (S i), germa ni um (Ge), t in (Sn), lead (Pb), antimony (Sb), bismuth (Bi), z in c (Zn), alum in um (Al), 3 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment and cadmium (Cd), b) alloys or in termetal li c compounds of S i, Ge, S n, Pb, Sb, B i, Zn, Al, or Cd with other elements, where in said alloys or compounds are stoich i omet n c or non- stoich i ometric, c) oxides, carbides, nitn des, sulfides, phosphides, sele ni des, and tellurides of Si, Ge, S n, Pb, Sb, B i, Zn, Al, Fe, or Cd, and their mixtures or composites, and d),ombin ations thereof
The so li d nanocomposite particle composition of claim 1 where in the electrode i ctive material comprises a cathode active material selected from the group consist in g of li thium cobalt oxide, doped li thium cobalt oxide, li thium ni ckel oxide, doped li thium ni ckel oxide, li thium manganese oxide, doped li thium manganese oxide, li thium i ron phosphate, li thium manganese phosphate, li thium vanadium oxide, doped li thium vanadium oxide, li thium vanadium phosphate, li thium transition metal phosphate, li thium mixed-metal phosphates, metal sulfides, metal phosphides, metal haloge ni des, and comb in ations thereof
The so li d nanocomposite particle composition of claim 1 where in jai d nano graphene platelets occupy a weight fraction w g of 2 % to 50 % of the total l anocomposite weight, said electrode active material occup i es a weight fraction w a of 10% to 80% of the total nanocomposite weight, and said mat n x mate n al occup i es a weight fraction wm of 4 % to 30 % of the total nanocomposite weight with w g+wa +wm =1
A li thium metal battery comp nsin g a li thium metal anode, a cathode, a separator disposed between said anode and said cathode, an electrolyte in ioni c contact with said anode in d said cathode, where in said cathode comprises a nanocomposite so li d particle as defined in claim 1
A li thium secondary battery compris in g an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said cathode, where in said anode comprises a so li d nanocomposite particle of claim 1 as an anode active material
A li thium secondary battery compris in g an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said 4 Appli cation No 12/315,555 Attorney Docket No 075213-00068US Amendment cathode, where in said cathode comprises a so li d nanocomposite particle of claim 1 as a cathode active material
canceled
(Cancelled canceled
canceled
canceled
canceled
canceled
A so li d nanocomposite particle composition for li thium metal or li thium i on battery cathode app li cations, said composition compris in g (A) A cathode active material in a form of fine rods, wires, or fibers, with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 10 nm, and (C) A protective matrix material re in forced by said nano graphene platelets, where in said protective mat n x material is selected from a polymer, polymeric carbon, amorphous carbon, meso-phase carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal oxide, metal hyd n de, metal ni tride, metal carbide, metal sulfide, orga ni c material, or a comb in ation thereof and, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective matrix material, and said nano graphene platelets occupy a weight fraction wg of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction w a of 1% to % of the total nanocomposite weight, and 5 Appli cation No 12/315,555 Attorney Docket No 075213-00068U S Amendment said mat n x mate n al occup i es a weight fraction w m of at least 2 % of the total nanocomposite weight with w g + wa+ wm = 1
A so li d nanocomposite particle composition for li thium metal or li thium i on battery electrode app li cations, said composition comp nsin g (A) An electrode active material in a form of fine particles, rods, wires, fibers, or tubes with a dimension smaller than 1 gin, (B) Nano graphene platelets hav in g a thickness less than 10 nm, and (C) A protective matrix material re in forced by said nano graphene platelets, where in said nano graphene platelets and said electrode active material are prepared separately and are both dispersed in said protective mat n x material, and said nano graphene platelets occupy a weight fraction w g of 1% to 90 % of the total nanocomposite weight, said electrode active material occup i es a weight fraction w a of 1% to % of the total nanocomposite weight, and said mat n x mate n al occup i es a weight fraction wm of at least 2 % of the total nanocomposite weight with w g + w a + wm = 1, where in the protective mat n x is selected from a polymer, meso-phase carbon, coke, metal oxide, metal hydride, metal nitri de, metal carbide, metal sulfide, orga ni c mate n al, or a comb in ation thereof, and the electrode active mate nal comp n ses an anode active mate n al selected from the group consist in g of a) germa nium (Ge), t in (Sn), lead (Pb), antimony (Sb), bismuth (Bi), z in c (Zn), alum in um (Al), and cadmium (Cd), b) alloys or in termetal li c compounds of S i, Ge, Sn, Pb, Sb, B i, Zn, Al, or Cd with other elements, where in said alloys or compounds are stoich i ometric or non- stoich i ometric, c) oxides, carbides, ni trides, sulfides, phosphides, sele ni des, and tellurides of Si, Ge, Sn, Pb, Sb, B i, Zn, Al, Fe, or Cd, and their mixtures or composites, and d) comb in ations thereof 6
Layer stacks claimed or described, ordered top of device to substrate.
solid nanocomposite particle for lithium battery electrode
lithium metal battery
lithium secondary battery with nanocomposite anode
lithium secondary battery with nanocomposite cathode
Materials described outside the worked examples.
electrode active material
nano graphene platelets
protective matrix material
silicon
Si
germanium
Ge
tin
Sn
lead
Pb
antimony
Sb
bismuth
Bi
zinc
Zn
aluminum
Al
cadmium
Cd
lithium cobalt oxide
LiCoO₂
lithium nickel oxide
LiNiO₂
lithium manganese oxide
LiMnO₂
lithium iron phosphate
LiFePO₄
lithium manganese phosphate
LiMnPO₄
lithium vanadium oxide
lithium vanadium phosphate
amorphous carbon
polymeric carbon
meso-phase carbon
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
anode specific capacity (claim minimum) | 500 mAh/g | — |
anode specific capacity (claim minimum) | 1000 mAh/g | — |
anode specific capacity (claim minimum) | 2000 mAh/g | — |
anode reversible specific capacity after 100 cycles (claim minimum) | 1500 mAh/g | — |
anode reversible specific capacity after 500 cycles (claim minimum) | 1000 mAh/g | — |
Thickness | 85–150 nm | — |
Duration | 30–120 s | — |
Thickness | 1–2 mm | — |
Thickness | 30–50 nm | — |
Thickness | 40–120 nm | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 500 nm | — |
Thickness | ≤ 200 nm | — |
Thickness | ≤ 50 nm | — |
Thickness | ≤ 10 nm | — |
Related documents with shared materials, methods, properties, or citations.
Supercritical Fluid Production of Graphene-Based Supercapacitor Electrode from Coke or Coal
Large-grain graphene thin film current collector and secondary batteries containing same
GRAPHENE-ENABLED SELENIUM CATHODE ACTIVE MATERIAL FOR AN ALKALI METAL-SELENIUM SECONDARY BATTERY