Patent
US 10,879,526CONFORMAL GRAPHENE CAGE ENCAPSULATED BATTERY ELECTRODE MATERIALS AND METHODS OF FORMING THEREOF
Yuzhang Li
US
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Patent
Atlas literature
Patent
US 10,879,526Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1: Design and structure of graphene cage encapsulation. a, Si microparticles fracture and lose electrical contact during repeated battery cycling. Freshly …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 4: In situ TEM observation of graphene cage Si lithiation. a, Diagram of the nanoscale electrochemical cell for in situ (de)lithiation. b, Time-lapse …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 6: a, SEM image of bare SiMP. Note the highly non-uniform distribution of size and shape. b, Size distribution statistics of bare SiMP. [0016]
FIG. 7: SEM image of Ni-coated SiMP. Inset is a higher magnification SEM image showing conformal Ni coating despite highly non-uniform size and shape …
FIG. 8: a, Digital image of bare Si nanoparticles (left) and microparticles (right). Each vial contains about 0.4 g of particles. Note that on the microscale, …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 10). With less carbon content, the graphene cage reduces the possibility of irreversibly trapping Li ions without compromising the specific capacity of the …
FIG. 11). Furthermore, this is achieved without the use of any conductive additives, displaying the excellent electrical conductivity of the graphene cage. …
FIG. 12. g, Electrochemical impedance spectroscopy (EIS) measurements of graphene-encapsulated, bare, and amorphous carbon-coated SiMP. Note that the graphene …
FIG. 13: Deep galvanostatic cycling performance of 4 SiMP@Gr coin cells with no rate change at about C/8 (C = 4.2 Ah/g). Stable cycling behavior is achieved …
FIG. 14: a, Galvanostatic cycling performance of SiMP@Gr at different current densities (C = 4.2 Ah/g). Even without conductive additives, a specific capacity of …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 16 for an example of a graphene cage encapsulating a lithium iron phosphate cathode material). By imparting mechanical strength, electrical conductivity, …
FIG. 17: Schematic of a battery including a graphene-encapsulated material. 4839-2284-7026 1 5 Atty. Dkt. No.: 102354-0327 Client Ref. No.: S 15-077 Detailed …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of forming a conformal graphene-encapsulated material, comp ri sing: coating a battery electrode material with a metal catalyst to form a metal catalyst-coated battery electrode material, wherein coating the battery electrode material with the metal catalyst includes performing electroless deposition of the metal catalyst on the battery electrode material; growing graphene on the metal catalyst-coated battery electrode material to form a graphene cage encapsulating the metal catalyst-coated battery electrode material; and at least partially removing the metal catalyst to form a void inside the graphene cage. Previously presented
The method of claim 1, wherein the metal catalyst is nickel. Original
The method of claim 1, wherein growing the graphene includes exposing the metal catalyst-coated battery electrode material to a carbon-containing source, followed by performing carburization and annealing. Original
The method of claim 1, wherein removing the metal catalyst is through the graphene cage. Original
The method of claim 1, wherein removing the metal catalyst is via an etchant. Original
The method of claim 1, wherein the battery electrode material includes silicon. Original
The method of claim 1, wherein the battery electrode material is provided as at least one particle having a dimension in the range of 200 nm to 10 pm. Original
Canceled
1O.-1 8. Canceled
Layer stacks claimed or described, ordered top of device to substrate.
graphene cage encapsulated battery electrode material
Materials described outside the worked examples.
battery electrode material
metal catalyst
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1: Design and structure of graphene cage encapsulation. a, Si microparticles fracture and lose electrical contact during repeated battery cycling. Freshly …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Temperature | 200–600 °C | — |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,879,526Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1: Design and structure of graphene cage encapsulation. a, Si microparticles fracture and lose electrical contact during repeated battery cycling. Freshly …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 4: In situ TEM observation of graphene cage Si lithiation. a, Diagram of the nanoscale electrochemical cell for in situ (de)lithiation. b, Time-lapse …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 6: a, SEM image of bare SiMP. Note the highly non-uniform distribution of size and shape. b, Size distribution statistics of bare SiMP. [0016]
FIG. 7: SEM image of Ni-coated SiMP. Inset is a higher magnification SEM image showing conformal Ni coating despite highly non-uniform size and shape …
FIG. 8: a, Digital image of bare Si nanoparticles (left) and microparticles (right). Each vial contains about 0.4 g of particles. Note that on the microscale, …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 10). With less carbon content, the graphene cage reduces the possibility of irreversibly trapping Li ions without compromising the specific capacity of the …
FIG. 11). Furthermore, this is achieved without the use of any conductive additives, displaying the excellent electrical conductivity of the graphene cage. …
FIG. 12. g, Electrochemical impedance spectroscopy (EIS) measurements of graphene-encapsulated, bare, and amorphous carbon-coated SiMP. Note that the graphene …
FIG. 13: Deep galvanostatic cycling performance of 4 SiMP@Gr coin cells with no rate change at about C/8 (C = 4.2 Ah/g). Stable cycling behavior is achieved …
FIG. 14: a, Galvanostatic cycling performance of SiMP@Gr at different current densities (C = 4.2 Ah/g). Even without conductive additives, a specific capacity of …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 16 for an example of a graphene cage encapsulating a lithium iron phosphate cathode material). By imparting mechanical strength, electrical conductivity, …
FIG. 17: Schematic of a battery including a graphene-encapsulated material. 4839-2284-7026 1 5 Atty. Dkt. No.: 102354-0327 Client Ref. No.: S 15-077 Detailed …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of forming a conformal graphene-encapsulated material, comp ri sing: coating a battery electrode material with a metal catalyst to form a metal catalyst-coated battery electrode material, wherein coating the battery electrode material with the metal catalyst includes performing electroless deposition of the metal catalyst on the battery electrode material; growing graphene on the metal catalyst-coated battery electrode material to form a graphene cage encapsulating the metal catalyst-coated battery electrode material; and at least partially removing the metal catalyst to form a void inside the graphene cage. Previously presented
The method of claim 1, wherein the metal catalyst is nickel. Original
The method of claim 1, wherein growing the graphene includes exposing the metal catalyst-coated battery electrode material to a carbon-containing source, followed by performing carburization and annealing. Original
The method of claim 1, wherein removing the metal catalyst is through the graphene cage. Original
The method of claim 1, wherein removing the metal catalyst is via an etchant. Original
The method of claim 1, wherein the battery electrode material includes silicon. Original
The method of claim 1, wherein the battery electrode material is provided as at least one particle having a dimension in the range of 200 nm to 10 pm. Original
Canceled
1O.-1 8. Canceled
Layer stacks claimed or described, ordered top of device to substrate.
graphene cage encapsulated battery electrode material
Materials described outside the worked examples.
battery electrode material
metal catalyst
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1: Design and structure of graphene cage encapsulation. a, Si microparticles fracture and lose electrical contact during repeated battery cycling. Freshly …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Temperature | 200–600 °C | — |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,879,526Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1: Design and structure of graphene cage encapsulation. a, Si microparticles fracture and lose electrical contact during repeated battery cycling. Freshly …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 4: In situ TEM observation of graphene cage Si lithiation. a, Diagram of the nanoscale electrochemical cell for in situ (de)lithiation. b, Time-lapse …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 6: a, SEM image of bare SiMP. Note the highly non-uniform distribution of size and shape. b, Size distribution statistics of bare SiMP. [0016]
FIG. 7: SEM image of Ni-coated SiMP. Inset is a higher magnification SEM image showing conformal Ni coating despite highly non-uniform size and shape …
FIG. 8: a, Digital image of bare Si nanoparticles (left) and microparticles (right). Each vial contains about 0.4 g of particles. Note that on the microscale, …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 10). With less carbon content, the graphene cage reduces the possibility of irreversibly trapping Li ions without compromising the specific capacity of the …
FIG. 11). Furthermore, this is achieved without the use of any conductive additives, displaying the excellent electrical conductivity of the graphene cage. …
FIG. 12. g, Electrochemical impedance spectroscopy (EIS) measurements of graphene-encapsulated, bare, and amorphous carbon-coated SiMP. Note that the graphene …
FIG. 13: Deep galvanostatic cycling performance of 4 SiMP@Gr coin cells with no rate change at about C/8 (C = 4.2 Ah/g). Stable cycling behavior is achieved …
FIG. 14: a, Galvanostatic cycling performance of SiMP@Gr at different current densities (C = 4.2 Ah/g). Even without conductive additives, a specific capacity of …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 16 for an example of a graphene cage encapsulating a lithium iron phosphate cathode material). By imparting mechanical strength, electrical conductivity, …
FIG. 17: Schematic of a battery including a graphene-encapsulated material. 4839-2284-7026 1 5 Atty. Dkt. No.: 102354-0327 Client Ref. No.: S 15-077 Detailed …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of forming a conformal graphene-encapsulated material, comp ri sing: coating a battery electrode material with a metal catalyst to form a metal catalyst-coated battery electrode material, wherein coating the battery electrode material with the metal catalyst includes performing electroless deposition of the metal catalyst on the battery electrode material; growing graphene on the metal catalyst-coated battery electrode material to form a graphene cage encapsulating the metal catalyst-coated battery electrode material; and at least partially removing the metal catalyst to form a void inside the graphene cage. Previously presented
The method of claim 1, wherein the metal catalyst is nickel. Original
The method of claim 1, wherein growing the graphene includes exposing the metal catalyst-coated battery electrode material to a carbon-containing source, followed by performing carburization and annealing. Original
The method of claim 1, wherein removing the metal catalyst is through the graphene cage. Original
The method of claim 1, wherein removing the metal catalyst is via an etchant. Original
The method of claim 1, wherein the battery electrode material includes silicon. Original
The method of claim 1, wherein the battery electrode material is provided as at least one particle having a dimension in the range of 200 nm to 10 pm. Original
Canceled
1O.-1 8. Canceled
Layer stacks claimed or described, ordered top of device to substrate.
graphene cage encapsulated battery electrode material
Materials described outside the worked examples.
battery electrode material
metal catalyst
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1: Design and structure of graphene cage encapsulation. a, Si microparticles fracture and lose electrical contact during repeated battery cycling. Freshly …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Temperature | 200–600 °C | — |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,879,526Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1: Design and structure of graphene cage encapsulation. a, Si microparticles fracture and lose electrical contact during repeated battery cycling. Freshly …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 4: In situ TEM observation of graphene cage Si lithiation. a, Diagram of the nanoscale electrochemical cell for in situ (de)lithiation. b, Time-lapse …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 6: a, SEM image of bare SiMP. Note the highly non-uniform distribution of size and shape. b, Size distribution statistics of bare SiMP. [0016]
FIG. 7: SEM image of Ni-coated SiMP. Inset is a higher magnification SEM image showing conformal Ni coating despite highly non-uniform size and shape …
FIG. 8: a, Digital image of bare Si nanoparticles (left) and microparticles (right). Each vial contains about 0.4 g of particles. Note that on the microscale, …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 10). With less carbon content, the graphene cage reduces the possibility of irreversibly trapping Li ions without compromising the specific capacity of the …
FIG. 11). Furthermore, this is achieved without the use of any conductive additives, displaying the excellent electrical conductivity of the graphene cage. …
FIG. 12. g, Electrochemical impedance spectroscopy (EIS) measurements of graphene-encapsulated, bare, and amorphous carbon-coated SiMP. Note that the graphene …
FIG. 13: Deep galvanostatic cycling performance of 4 SiMP@Gr coin cells with no rate change at about C/8 (C = 4.2 Ah/g). Stable cycling behavior is achieved …
FIG. 14: a, Galvanostatic cycling performance of SiMP@Gr at different current densities (C = 4.2 Ah/g). Even without conductive additives, a specific capacity of …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 16 for an example of a graphene cage encapsulating a lithium iron phosphate cathode material). By imparting mechanical strength, electrical conductivity, …
FIG. 17: Schematic of a battery including a graphene-encapsulated material. 4839-2284-7026 1 5 Atty. Dkt. No.: 102354-0327 Client Ref. No.: S 15-077 Detailed …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of forming a conformal graphene-encapsulated material, comp ri sing: coating a battery electrode material with a metal catalyst to form a metal catalyst-coated battery electrode material, wherein coating the battery electrode material with the metal catalyst includes performing electroless deposition of the metal catalyst on the battery electrode material; growing graphene on the metal catalyst-coated battery electrode material to form a graphene cage encapsulating the metal catalyst-coated battery electrode material; and at least partially removing the metal catalyst to form a void inside the graphene cage. Previously presented
The method of claim 1, wherein the metal catalyst is nickel. Original
The method of claim 1, wherein growing the graphene includes exposing the metal catalyst-coated battery electrode material to a carbon-containing source, followed by performing carburization and annealing. Original
The method of claim 1, wherein removing the metal catalyst is through the graphene cage. Original
The method of claim 1, wherein removing the metal catalyst is via an etchant. Original
The method of claim 1, wherein the battery electrode material includes silicon. Original
The method of claim 1, wherein the battery electrode material is provided as at least one particle having a dimension in the range of 200 nm to 10 pm. Original
Canceled
1O.-1 8. Canceled
Layer stacks claimed or described, ordered top of device to substrate.
graphene cage encapsulated battery electrode material
Materials described outside the worked examples.
battery electrode material
metal catalyst
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1: Design and structure of graphene cage encapsulation. a, Si microparticles fracture and lose electrical contact during repeated battery cycling. Freshly …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Temperature | 200–600 °C | — |
Related documents with shared materials, methods, properties, or citations.
nickel
Ni
graphene
silicon
Si
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 4: In situ TEM observation of graphene cage Si lithiation. a, Diagram of the nanoscale electrochemical cell for in situ (de)lithiation. b, Time-lapse …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 6: a, SEM image of bare SiMP. Note the highly non-uniform distribution of size and shape. b, Size distribution statistics of bare SiMP. [0016]
FIG. 7: SEM image of Ni-coated SiMP. Inset is a higher magnification SEM image showing conformal Ni coating despite highly non-uniform size and shape …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 10). With less carbon content, the graphene cage reduces the possibility of irreversibly trapping Li ions without compromising the specific capacity of the …
FIG. 11). Furthermore, this is achieved without the use of any conductive additives, displaying the excellent electrical conductivity of the graphene cage. …
FIG. 13: Deep galvanostatic cycling performance of 4 SiMP@Gr coin cells with no rate change at about C/8 (C = 4.2 Ah/g). Stable cycling behavior is achieved …
FIG. 14: a, Galvanostatic cycling performance of SiMP@Gr at different current densities (C = 4.2 Ah/g). Even without conductive additives, a specific capacity of …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 16 for an example of a graphene cage encapsulating a lithium iron phosphate cathode material). By imparting mechanical strength, electrical conductivity, …
nickel
Ni
graphene
silicon
Si
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 4: In situ TEM observation of graphene cage Si lithiation. a, Diagram of the nanoscale electrochemical cell for in situ (de)lithiation. b, Time-lapse …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 6: a, SEM image of bare SiMP. Note the highly non-uniform distribution of size and shape. b, Size distribution statistics of bare SiMP. [0016]
FIG. 7: SEM image of Ni-coated SiMP. Inset is a higher magnification SEM image showing conformal Ni coating despite highly non-uniform size and shape …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 10). With less carbon content, the graphene cage reduces the possibility of irreversibly trapping Li ions without compromising the specific capacity of the …
FIG. 11). Furthermore, this is achieved without the use of any conductive additives, displaying the excellent electrical conductivity of the graphene cage. …
FIG. 13: Deep galvanostatic cycling performance of 4 SiMP@Gr coin cells with no rate change at about C/8 (C = 4.2 Ah/g). Stable cycling behavior is achieved …
FIG. 14: a, Galvanostatic cycling performance of SiMP@Gr at different current densities (C = 4.2 Ah/g). Even without conductive additives, a specific capacity of …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 16 for an example of a graphene cage encapsulating a lithium iron phosphate cathode material). By imparting mechanical strength, electrical conductivity, …
nickel
Ni
graphene
silicon
Si
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 4: In situ TEM observation of graphene cage Si lithiation. a, Diagram of the nanoscale electrochemical cell for in situ (de)lithiation. b, Time-lapse …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 6: a, SEM image of bare SiMP. Note the highly non-uniform distribution of size and shape. b, Size distribution statistics of bare SiMP. [0016]
FIG. 7: SEM image of Ni-coated SiMP. Inset is a higher magnification SEM image showing conformal Ni coating despite highly non-uniform size and shape …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 10). With less carbon content, the graphene cage reduces the possibility of irreversibly trapping Li ions without compromising the specific capacity of the …
FIG. 11). Furthermore, this is achieved without the use of any conductive additives, displaying the excellent electrical conductivity of the graphene cage. …
FIG. 13: Deep galvanostatic cycling performance of 4 SiMP@Gr coin cells with no rate change at about C/8 (C = 4.2 Ah/g). Stable cycling behavior is achieved …
FIG. 14: a, Galvanostatic cycling performance of SiMP@Gr at different current densities (C = 4.2 Ah/g). Even without conductive additives, a specific capacity of …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 16 for an example of a graphene cage encapsulating a lithium iron phosphate cathode material). By imparting mechanical strength, electrical conductivity, …
nickel
Ni
graphene
silicon
Si
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 2a). Using electroless deposition, SiMPs are conformally coated with Ni, the thickness of which can be tuned for the appropriate void space. Next, a …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 3: Particle-level electrical and mechanical characterization of graphene cage by in situ TEM. a, Diagram of an electrical circuit for current-voltage …
FIG. 4: In situ TEM observation of graphene cage Si lithiation. a, Diagram of the nanoscale electrochemical cell for in situ (de)lithiation. b, Time-lapse …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 5 d, it is observed that the graphene cage stays intact while the fractured microscale Si remains electrically connected on the particle level. …
FIG. 6: a, SEM image of bare SiMP. Note the highly non-uniform distribution of size and shape. b, Size distribution statistics of bare SiMP. [0016]
FIG. 7: SEM image of Ni-coated SiMP. Inset is a higher magnification SEM image showing conformal Ni coating despite highly non-uniform size and shape …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 9: a, TEM image of SiMP@Gr. b, Selected area diffraction of SiMP@Gr shows crystalline structure of silicon. c, Dark field TEM shows location where …
FIG. 10). With less carbon content, the graphene cage reduces the possibility of irreversibly trapping Li ions without compromising the specific capacity of the …
FIG. 11). Furthermore, this is achieved without the use of any conductive additives, displaying the excellent electrical conductivity of the graphene cage. …
FIG. 13: Deep galvanostatic cycling performance of 4 SiMP@Gr coin cells with no rate change at about C/8 (C = 4.2 Ah/g). Stable cycling behavior is achieved …
FIG. 14: a, Galvanostatic cycling performance of SiMP@Gr at different current densities (C = 4.2 Ah/g). Even without conductive additives, a specific capacity of …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 15: a, Schematic of sodium hydroxide etching (about 2 M Na O H for about 4 h) of SiMP@Gr. The self-supporting graphene cage remains intact after etching. …
FIG. 16 for an example of a graphene cage encapsulating a lithium iron phosphate cathode material). By imparting mechanical strength, electrical conductivity, …