Patent
US 10,818,915Graphene-Coated Porous Silicon-Carbon Composite and Method of Manufacturing the Same
Eui Yong HWANG
US
Copyright © 2026 Matter42. All rights reserved.
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US 10,818,915Patent drawings and their descriptions. Click a drawing to enlarge it.
FIGS. 1 A to 1 C are scanning electron microscope (SEM) 5 images of a graphene- coated porous silicon-carbon composite manufactured according to Example 1 of …
FIGS. 2A to 2C are SEM images of a 5 graphene-coated porous silicon-carbon composite manufactured according to Example 2 of the present invention; [0020]
FIG. 3 is an SEM image of a graphene-coated porous silicon-carbon composite manufactured according to Example 3 of the present invention; [0021]
FIG. 4 is an SEM image of a 10 graphene-coated porous silicon-carbon composite manufactured according to Example 4 of the present invention; [0022]
FIG. 5 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 2 as a related art; 15 [0023]
FIG. 6 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 3 as a related art; [0024]
FIG. 7 is a 20 graph illustrating capacity retention versus cycle number of lithium secondary batteries according to Experimental Example 1 of the present …
FIG. 8 is a graph in which that a thermal decomposition product of a polymer is cross- linked with a carbon precursor in a porous silicon-carbon composite …
FIGS. 9A to 9B are SEM images of surfaces of electrodes including porous silicon-carbon composites according to Experimental Example 3 of the present …
FIGS. 10 A and 10 B are graphs illustrating discharge 5 capacity versus cycle number of lithium secondary batteries according to Experimental Example 4 of the …
FIGS. 11 A to 11 B are SEM images of surfaces of electrodes according to Experimental
FIGS. 12A and 12B, it may be confirmed that the lithium secondary battery (green), which was 20 configured to include the negative electrode including the porous …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A porous silicon-carbon composite for a negative electrode active material comprising: a core including a plurality of active particles, a conductive material formed on at least a portion of surfaces of the plurality of active particles, first pores, and second pores; and a first shell layer which is coated on the core and includes graphene, wherein the plurality of active particles comprise a plurality of silicon particles, silicon oxide particles, or a combination thereof, the first pores are present in the core and are formed by being surrounded by the plurality of active particles adjacent to a first pore, and the first pore is a non-linear pore in which an outer surface of the first pore is formed along the surfaces of the plurality of adjacent active particles, and the second pores are irregularly dispersed and present in the core, has an average particle diameter smaller than an average particle diameter of the plurality of active particles, and are spherical,wherein the second pores are formed by dispersing a porogen in a mixture for forming the core, and sintering to form the second pores in positions where the porogen was dispersed; wherein a total volume of the first pores and the second pores is in a range of 50 vol% to 300 vol% based on a total volume of the plurality of active particles of the core, wherein an average particle diameter D₅₀ of the second pores is in a range of 50 nm to 500 nm, wherein the average particle diameter D₅₀ of the second pores are smaller than an average particle diameter of plurality of the active particles and larger than that of the first pores, and wherein the conductive material comprises carbon nanotubes and is present in a network structure or thread structure in which the carbon nanotubes are bonded and connected to each other, and is present in a form of being combined with at least a portion of surfaces of the plurality of active particles. Currently amended
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles comprise a silicon-based composite expressed by SiO x (0<x< 2). Currently amended
The porous silicon-carbon composite of claim 1, wherein a n -the average particle diameter (D₅₀) of the plurality of active particles is in a range of 3 nm to 900 nm. Currently amended
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles are included in an amount of 10 wt% to 95 wt% based on a total weight of the core. Currently amended
The porous silicon-carbon composite of claim 1, wherein an average particle diameter (D₅₀) of the core is in a range of 0.5 m to 50 m. Original
The porous silicon-carbon composite of claim 1, wherein the conductive material is at least one selected from the group consisting of carbon nanotubes (CNT), graphene, and amorphous carbon. Original
The porous silicon-carbon composite of claim 1, wherein the conductive material is included in an amount of 1 wt% to 30 wt% based on a total weight of the porous silicon- carbon composite. Original
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles further comprise a carbon coating layer. Currently amended
The porous silicon-carbon composite of claim 1, wherein the porogen comprises a polymer material. Previously presented
The porous silicon-carbon composite of claim 1, wherein an average particle diameter (D₅₀) of the porous silicon-carbon composite is in a range of 0.5 m to 55 m. Original
The porous silicon-carbon composite of claim 1, further comprising a second shell layer coated on the first shell layer. Original
A method of manufacturing the porous silicon-carbon composite of claim 1, the method comprising: preparing a first mixed solution in which silicon or silicon oxide particles, a conductive material, and a porogen are dispersed; dispersing graphene oxide in the first mixed solution to prepare a second mixed solution; spray drying the second mixed solution to prepare a composite including a core and a first shell layer; and sintering the composite to manufacture a porous silicon-carbon composite having a portion of a surface or an entire surface thereof coated with graphene. Withdrawn
Canceled
7-8. Canceled
Canceled
Canceled
Canceled
Canceled
Canceled
28-29. Canceled
Canceled
Canceled
A negative electrode active material comprising the porous silicon- carbon composite of claim
A negative electrode comprising the negative electrode active material of claim 39, a conductive agent, and a binder. Withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
porous silicon-carbon composite
negative electrode active material
lithium secondary battery
Materials described outside the worked examples.
silicon particles
Si
graphene
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIGS. 1 A to 1 C are scanning electron microscope (SEM) 5 images of a graphene- coated porous silicon-carbon composite manufactured according to Example 1 of …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 3–900 nm | — |
Thickness |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,818,915Patent drawings and their descriptions. Click a drawing to enlarge it.
FIGS. 1 A to 1 C are scanning electron microscope (SEM) 5 images of a graphene- coated porous silicon-carbon composite manufactured according to Example 1 of …
FIGS. 2A to 2C are SEM images of a 5 graphene-coated porous silicon-carbon composite manufactured according to Example 2 of the present invention; [0020]
FIG. 3 is an SEM image of a graphene-coated porous silicon-carbon composite manufactured according to Example 3 of the present invention; [0021]
FIG. 4 is an SEM image of a 10 graphene-coated porous silicon-carbon composite manufactured according to Example 4 of the present invention; [0022]
FIG. 5 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 2 as a related art; 15 [0023]
FIG. 6 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 3 as a related art; [0024]
FIG. 7 is a 20 graph illustrating capacity retention versus cycle number of lithium secondary batteries according to Experimental Example 1 of the present …
FIG. 8 is a graph in which that a thermal decomposition product of a polymer is cross- linked with a carbon precursor in a porous silicon-carbon composite …
FIGS. 9A to 9B are SEM images of surfaces of electrodes including porous silicon-carbon composites according to Experimental Example 3 of the present …
FIGS. 10 A and 10 B are graphs illustrating discharge 5 capacity versus cycle number of lithium secondary batteries according to Experimental Example 4 of the …
FIGS. 11 A to 11 B are SEM images of surfaces of electrodes according to Experimental
FIGS. 12A and 12B, it may be confirmed that the lithium secondary battery (green), which was 20 configured to include the negative electrode including the porous …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A porous silicon-carbon composite for a negative electrode active material comprising: a core including a plurality of active particles, a conductive material formed on at least a portion of surfaces of the plurality of active particles, first pores, and second pores; and a first shell layer which is coated on the core and includes graphene, wherein the plurality of active particles comprise a plurality of silicon particles, silicon oxide particles, or a combination thereof, the first pores are present in the core and are formed by being surrounded by the plurality of active particles adjacent to a first pore, and the first pore is a non-linear pore in which an outer surface of the first pore is formed along the surfaces of the plurality of adjacent active particles, and the second pores are irregularly dispersed and present in the core, has an average particle diameter smaller than an average particle diameter of the plurality of active particles, and are spherical,wherein the second pores are formed by dispersing a porogen in a mixture for forming the core, and sintering to form the second pores in positions where the porogen was dispersed; wherein a total volume of the first pores and the second pores is in a range of 50 vol% to 300 vol% based on a total volume of the plurality of active particles of the core, wherein an average particle diameter D₅₀ of the second pores is in a range of 50 nm to 500 nm, wherein the average particle diameter D₅₀ of the second pores are smaller than an average particle diameter of plurality of the active particles and larger than that of the first pores, and wherein the conductive material comprises carbon nanotubes and is present in a network structure or thread structure in which the carbon nanotubes are bonded and connected to each other, and is present in a form of being combined with at least a portion of surfaces of the plurality of active particles. Currently amended
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles comprise a silicon-based composite expressed by SiO x (0<x< 2). Currently amended
The porous silicon-carbon composite of claim 1, wherein a n -the average particle diameter (D₅₀) of the plurality of active particles is in a range of 3 nm to 900 nm. Currently amended
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles are included in an amount of 10 wt% to 95 wt% based on a total weight of the core. Currently amended
The porous silicon-carbon composite of claim 1, wherein an average particle diameter (D₅₀) of the core is in a range of 0.5 m to 50 m. Original
The porous silicon-carbon composite of claim 1, wherein the conductive material is at least one selected from the group consisting of carbon nanotubes (CNT), graphene, and amorphous carbon. Original
The porous silicon-carbon composite of claim 1, wherein the conductive material is included in an amount of 1 wt% to 30 wt% based on a total weight of the porous silicon- carbon composite. Original
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles further comprise a carbon coating layer. Currently amended
The porous silicon-carbon composite of claim 1, wherein the porogen comprises a polymer material. Previously presented
The porous silicon-carbon composite of claim 1, wherein an average particle diameter (D₅₀) of the porous silicon-carbon composite is in a range of 0.5 m to 55 m. Original
The porous silicon-carbon composite of claim 1, further comprising a second shell layer coated on the first shell layer. Original
A method of manufacturing the porous silicon-carbon composite of claim 1, the method comprising: preparing a first mixed solution in which silicon or silicon oxide particles, a conductive material, and a porogen are dispersed; dispersing graphene oxide in the first mixed solution to prepare a second mixed solution; spray drying the second mixed solution to prepare a composite including a core and a first shell layer; and sintering the composite to manufacture a porous silicon-carbon composite having a portion of a surface or an entire surface thereof coated with graphene. Withdrawn
Canceled
7-8. Canceled
Canceled
Canceled
Canceled
Canceled
Canceled
28-29. Canceled
Canceled
Canceled
A negative electrode active material comprising the porous silicon- carbon composite of claim
A negative electrode comprising the negative electrode active material of claim 39, a conductive agent, and a binder. Withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
porous silicon-carbon composite
negative electrode active material
lithium secondary battery
Materials described outside the worked examples.
silicon particles
Si
graphene
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIGS. 1 A to 1 C are scanning electron microscope (SEM) 5 images of a graphene- coated porous silicon-carbon composite manufactured according to Example 1 of …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 3–900 nm | — |
Thickness |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,818,915Patent drawings and their descriptions. Click a drawing to enlarge it.
FIGS. 1 A to 1 C are scanning electron microscope (SEM) 5 images of a graphene- coated porous silicon-carbon composite manufactured according to Example 1 of …
FIGS. 2A to 2C are SEM images of a 5 graphene-coated porous silicon-carbon composite manufactured according to Example 2 of the present invention; [0020]
FIG. 3 is an SEM image of a graphene-coated porous silicon-carbon composite manufactured according to Example 3 of the present invention; [0021]
FIG. 4 is an SEM image of a 10 graphene-coated porous silicon-carbon composite manufactured according to Example 4 of the present invention; [0022]
FIG. 5 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 2 as a related art; 15 [0023]
FIG. 6 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 3 as a related art; [0024]
FIG. 7 is a 20 graph illustrating capacity retention versus cycle number of lithium secondary batteries according to Experimental Example 1 of the present …
FIG. 8 is a graph in which that a thermal decomposition product of a polymer is cross- linked with a carbon precursor in a porous silicon-carbon composite …
FIGS. 9A to 9B are SEM images of surfaces of electrodes including porous silicon-carbon composites according to Experimental Example 3 of the present …
FIGS. 10 A and 10 B are graphs illustrating discharge 5 capacity versus cycle number of lithium secondary batteries according to Experimental Example 4 of the …
FIGS. 11 A to 11 B are SEM images of surfaces of electrodes according to Experimental
FIGS. 12A and 12B, it may be confirmed that the lithium secondary battery (green), which was 20 configured to include the negative electrode including the porous …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A porous silicon-carbon composite for a negative electrode active material comprising: a core including a plurality of active particles, a conductive material formed on at least a portion of surfaces of the plurality of active particles, first pores, and second pores; and a first shell layer which is coated on the core and includes graphene, wherein the plurality of active particles comprise a plurality of silicon particles, silicon oxide particles, or a combination thereof, the first pores are present in the core and are formed by being surrounded by the plurality of active particles adjacent to a first pore, and the first pore is a non-linear pore in which an outer surface of the first pore is formed along the surfaces of the plurality of adjacent active particles, and the second pores are irregularly dispersed and present in the core, has an average particle diameter smaller than an average particle diameter of the plurality of active particles, and are spherical,wherein the second pores are formed by dispersing a porogen in a mixture for forming the core, and sintering to form the second pores in positions where the porogen was dispersed; wherein a total volume of the first pores and the second pores is in a range of 50 vol% to 300 vol% based on a total volume of the plurality of active particles of the core, wherein an average particle diameter D₅₀ of the second pores is in a range of 50 nm to 500 nm, wherein the average particle diameter D₅₀ of the second pores are smaller than an average particle diameter of plurality of the active particles and larger than that of the first pores, and wherein the conductive material comprises carbon nanotubes and is present in a network structure or thread structure in which the carbon nanotubes are bonded and connected to each other, and is present in a form of being combined with at least a portion of surfaces of the plurality of active particles. Currently amended
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles comprise a silicon-based composite expressed by SiO x (0<x< 2). Currently amended
The porous silicon-carbon composite of claim 1, wherein a n -the average particle diameter (D₅₀) of the plurality of active particles is in a range of 3 nm to 900 nm. Currently amended
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles are included in an amount of 10 wt% to 95 wt% based on a total weight of the core. Currently amended
The porous silicon-carbon composite of claim 1, wherein an average particle diameter (D₅₀) of the core is in a range of 0.5 m to 50 m. Original
The porous silicon-carbon composite of claim 1, wherein the conductive material is at least one selected from the group consisting of carbon nanotubes (CNT), graphene, and amorphous carbon. Original
The porous silicon-carbon composite of claim 1, wherein the conductive material is included in an amount of 1 wt% to 30 wt% based on a total weight of the porous silicon- carbon composite. Original
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles further comprise a carbon coating layer. Currently amended
The porous silicon-carbon composite of claim 1, wherein the porogen comprises a polymer material. Previously presented
The porous silicon-carbon composite of claim 1, wherein an average particle diameter (D₅₀) of the porous silicon-carbon composite is in a range of 0.5 m to 55 m. Original
The porous silicon-carbon composite of claim 1, further comprising a second shell layer coated on the first shell layer. Original
A method of manufacturing the porous silicon-carbon composite of claim 1, the method comprising: preparing a first mixed solution in which silicon or silicon oxide particles, a conductive material, and a porogen are dispersed; dispersing graphene oxide in the first mixed solution to prepare a second mixed solution; spray drying the second mixed solution to prepare a composite including a core and a first shell layer; and sintering the composite to manufacture a porous silicon-carbon composite having a portion of a surface or an entire surface thereof coated with graphene. Withdrawn
Canceled
7-8. Canceled
Canceled
Canceled
Canceled
Canceled
Canceled
28-29. Canceled
Canceled
Canceled
A negative electrode active material comprising the porous silicon- carbon composite of claim
A negative electrode comprising the negative electrode active material of claim 39, a conductive agent, and a binder. Withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
porous silicon-carbon composite
negative electrode active material
lithium secondary battery
Materials described outside the worked examples.
silicon particles
Si
graphene
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIGS. 1 A to 1 C are scanning electron microscope (SEM) 5 images of a graphene- coated porous silicon-carbon composite manufactured according to Example 1 of …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 3–900 nm | — |
Thickness |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,818,915Patent drawings and their descriptions. Click a drawing to enlarge it.
FIGS. 1 A to 1 C are scanning electron microscope (SEM) 5 images of a graphene- coated porous silicon-carbon composite manufactured according to Example 1 of …
FIGS. 2A to 2C are SEM images of a 5 graphene-coated porous silicon-carbon composite manufactured according to Example 2 of the present invention; [0020]
FIG. 3 is an SEM image of a graphene-coated porous silicon-carbon composite manufactured according to Example 3 of the present invention; [0021]
FIG. 4 is an SEM image of a 10 graphene-coated porous silicon-carbon composite manufactured according to Example 4 of the present invention; [0022]
FIG. 5 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 2 as a related art; 15 [0023]
FIG. 6 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 3 as a related art; [0024]
FIG. 7 is a 20 graph illustrating capacity retention versus cycle number of lithium secondary batteries according to Experimental Example 1 of the present …
FIG. 8 is a graph in which that a thermal decomposition product of a polymer is cross- linked with a carbon precursor in a porous silicon-carbon composite …
FIGS. 9A to 9B are SEM images of surfaces of electrodes including porous silicon-carbon composites according to Experimental Example 3 of the present …
FIGS. 10 A and 10 B are graphs illustrating discharge 5 capacity versus cycle number of lithium secondary batteries according to Experimental Example 4 of the …
FIGS. 11 A to 11 B are SEM images of surfaces of electrodes according to Experimental
FIGS. 12A and 12B, it may be confirmed that the lithium secondary battery (green), which was 20 configured to include the negative electrode including the porous …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A porous silicon-carbon composite for a negative electrode active material comprising: a core including a plurality of active particles, a conductive material formed on at least a portion of surfaces of the plurality of active particles, first pores, and second pores; and a first shell layer which is coated on the core and includes graphene, wherein the plurality of active particles comprise a plurality of silicon particles, silicon oxide particles, or a combination thereof, the first pores are present in the core and are formed by being surrounded by the plurality of active particles adjacent to a first pore, and the first pore is a non-linear pore in which an outer surface of the first pore is formed along the surfaces of the plurality of adjacent active particles, and the second pores are irregularly dispersed and present in the core, has an average particle diameter smaller than an average particle diameter of the plurality of active particles, and are spherical,wherein the second pores are formed by dispersing a porogen in a mixture for forming the core, and sintering to form the second pores in positions where the porogen was dispersed; wherein a total volume of the first pores and the second pores is in a range of 50 vol% to 300 vol% based on a total volume of the plurality of active particles of the core, wherein an average particle diameter D₅₀ of the second pores is in a range of 50 nm to 500 nm, wherein the average particle diameter D₅₀ of the second pores are smaller than an average particle diameter of plurality of the active particles and larger than that of the first pores, and wherein the conductive material comprises carbon nanotubes and is present in a network structure or thread structure in which the carbon nanotubes are bonded and connected to each other, and is present in a form of being combined with at least a portion of surfaces of the plurality of active particles. Currently amended
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles comprise a silicon-based composite expressed by SiO x (0<x< 2). Currently amended
The porous silicon-carbon composite of claim 1, wherein a n -the average particle diameter (D₅₀) of the plurality of active particles is in a range of 3 nm to 900 nm. Currently amended
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles are included in an amount of 10 wt% to 95 wt% based on a total weight of the core. Currently amended
The porous silicon-carbon composite of claim 1, wherein an average particle diameter (D₅₀) of the core is in a range of 0.5 m to 50 m. Original
The porous silicon-carbon composite of claim 1, wherein the conductive material is at least one selected from the group consisting of carbon nanotubes (CNT), graphene, and amorphous carbon. Original
The porous silicon-carbon composite of claim 1, wherein the conductive material is included in an amount of 1 wt% to 30 wt% based on a total weight of the porous silicon- carbon composite. Original
The porous silicon-carbon composite of claim 1, wherein the plurality of active particles further comprise a carbon coating layer. Currently amended
The porous silicon-carbon composite of claim 1, wherein the porogen comprises a polymer material. Previously presented
The porous silicon-carbon composite of claim 1, wherein an average particle diameter (D₅₀) of the porous silicon-carbon composite is in a range of 0.5 m to 55 m. Original
The porous silicon-carbon composite of claim 1, further comprising a second shell layer coated on the first shell layer. Original
A method of manufacturing the porous silicon-carbon composite of claim 1, the method comprising: preparing a first mixed solution in which silicon or silicon oxide particles, a conductive material, and a porogen are dispersed; dispersing graphene oxide in the first mixed solution to prepare a second mixed solution; spray drying the second mixed solution to prepare a composite including a core and a first shell layer; and sintering the composite to manufacture a porous silicon-carbon composite having a portion of a surface or an entire surface thereof coated with graphene. Withdrawn
Canceled
7-8. Canceled
Canceled
Canceled
Canceled
Canceled
Canceled
28-29. Canceled
Canceled
Canceled
A negative electrode active material comprising the porous silicon- carbon composite of claim
A negative electrode comprising the negative electrode active material of claim 39, a conductive agent, and a binder. Withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
porous silicon-carbon composite
negative electrode active material
lithium secondary battery
Materials described outside the worked examples.
silicon particles
Si
graphene
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIGS. 1 A to 1 C are scanning electron microscope (SEM) 5 images of a graphene- coated porous silicon-carbon composite manufactured according to Example 1 of …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 3–900 nm | — |
Thickness |
Related documents with shared materials, methods, properties, or citations.
carbon nanotubes
silicon oxide particles
SiOx
silicon-based composite SiOx
SiOx (0<x<2)
amorphous carbon
carbon coating layer
porogen polymer material
graphene oxide
first carbon precursor
second carbon precursor
FIGS. 2A to 2C are SEM images of a 5 graphene-coated porous silicon-carbon composite manufactured according to Example 2 of the present invention; [0020]
FIG. 3 is an SEM image of a graphene-coated porous silicon-carbon composite manufactured according to Example 3 of the present invention; [0021]
FIG. 4 is an SEM image of a 10 graphene-coated porous silicon-carbon composite manufactured according to Example 4 of the present invention; [0022]
FIG. 5 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 2 as a related art; 15 [0023]
FIG. 6 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 3 as a related art; [0024]
FIG. 7 is a 20 graph illustrating capacity retention versus cycle number of lithium secondary batteries according to Experimental Example 1 of the present …
FIGS. 9A to 9B are SEM images of surfaces of electrodes including porous silicon-carbon composites according to Experimental Example 3 of the present …
FIGS. 11 A to 11 B are SEM images of surfaces of electrodes according to Experimental
| 50–500 nm |
| — |
Thickness | 0.3–300 nm | — |
Temperature | 100–250 °C | — |
Temperature | 150–200 °C | — |
Thickness | ≤ 3 nm | — |
Thickness | ≥ 900 nm | — |
carbon nanotubes
silicon oxide particles
SiOx
silicon-based composite SiOx
SiOx (0<x<2)
amorphous carbon
carbon coating layer
porogen polymer material
graphene oxide
first carbon precursor
second carbon precursor
FIGS. 2A to 2C are SEM images of a 5 graphene-coated porous silicon-carbon composite manufactured according to Example 2 of the present invention; [0020]
FIG. 3 is an SEM image of a graphene-coated porous silicon-carbon composite manufactured according to Example 3 of the present invention; [0021]
FIG. 4 is an SEM image of a 10 graphene-coated porous silicon-carbon composite manufactured according to Example 4 of the present invention; [0022]
FIG. 5 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 2 as a related art; 15 [0023]
FIG. 6 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 3 as a related art; [0024]
FIG. 7 is a 20 graph illustrating capacity retention versus cycle number of lithium secondary batteries according to Experimental Example 1 of the present …
FIGS. 9A to 9B are SEM images of surfaces of electrodes including porous silicon-carbon composites according to Experimental Example 3 of the present …
FIGS. 11 A to 11 B are SEM images of surfaces of electrodes according to Experimental
| 50–500 nm |
| — |
Thickness | 0.3–300 nm | — |
Temperature | 100–250 °C | — |
Temperature | 150–200 °C | — |
Thickness | ≤ 3 nm | — |
Thickness | ≥ 900 nm | — |
carbon nanotubes
silicon oxide particles
SiOx
silicon-based composite SiOx
SiOx (0<x<2)
amorphous carbon
carbon coating layer
porogen polymer material
graphene oxide
first carbon precursor
second carbon precursor
FIGS. 2A to 2C are SEM images of a 5 graphene-coated porous silicon-carbon composite manufactured according to Example 2 of the present invention; [0020]
FIG. 3 is an SEM image of a graphene-coated porous silicon-carbon composite manufactured according to Example 3 of the present invention; [0021]
FIG. 4 is an SEM image of a 10 graphene-coated porous silicon-carbon composite manufactured according to Example 4 of the present invention; [0022]
FIG. 5 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 2 as a related art; 15 [0023]
FIG. 6 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 3 as a related art; [0024]
FIG. 7 is a 20 graph illustrating capacity retention versus cycle number of lithium secondary batteries according to Experimental Example 1 of the present …
FIGS. 9A to 9B are SEM images of surfaces of electrodes including porous silicon-carbon composites according to Experimental Example 3 of the present …
FIGS. 11 A to 11 B are SEM images of surfaces of electrodes according to Experimental
| 50–500 nm |
| — |
Thickness | 0.3–300 nm | — |
Temperature | 100–250 °C | — |
Temperature | 150–200 °C | — |
Thickness | ≤ 3 nm | — |
Thickness | ≥ 900 nm | — |
carbon nanotubes
silicon oxide particles
SiOx
silicon-based composite SiOx
SiOx (0<x<2)
amorphous carbon
carbon coating layer
porogen polymer material
graphene oxide
first carbon precursor
second carbon precursor
FIGS. 2A to 2C are SEM images of a 5 graphene-coated porous silicon-carbon composite manufactured according to Example 2 of the present invention; [0020]
FIG. 3 is an SEM image of a graphene-coated porous silicon-carbon composite manufactured according to Example 3 of the present invention; [0021]
FIG. 4 is an SEM image of a 10 graphene-coated porous silicon-carbon composite manufactured according to Example 4 of the present invention; [0022]
FIG. 5 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 2 as a related art; 15 [0023]
FIG. 6 is an SEM image of a silicon-carbon composite manufactured according to Comparative Example 3 as a related art; [0024]
FIG. 7 is a 20 graph illustrating capacity retention versus cycle number of lithium secondary batteries according to Experimental Example 1 of the present …
FIGS. 9A to 9B are SEM images of surfaces of electrodes including porous silicon-carbon composites according to Experimental Example 3 of the present …
FIGS. 11 A to 11 B are SEM images of surfaces of electrodes according to Experimental
| 50–500 nm |
| — |
Thickness | 0.3–300 nm | — |
Temperature | 100–250 °C | — |
Temperature | 150–200 °C | — |
Thickness | ≤ 3 nm | — |
Thickness | ≥ 900 nm | — |