Patent
US 10,403,897CONDUCTIVE POLYMER BINDER FOR A NOVEL SILICON/GRAPHENE ANODE IN LITHIUM ION BATTERIES
Gao LIU
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 10,403,897Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 C and 1 D. Based o n these SEM images, it has shown that with both polymer binders, the PBuPy homopolymer and the PBuPy-MAA c opolymer, which …
FIG. 2A illustrates the cycling perf orm ance at C/1 0 (running with CC) of both PBuPy and PBuPy- M AA in high-loading anode as area capacity (mAh/SVG …
FIG. 3A illustrates the cycling performance at C/3 (running with CC) of both PBuPy and PBuPy-MAA in h i gh-l oa ding ano de as area cap aci ty (mAh/SVG …
FIG. 4 illustrates the cycling performance at C/3 (running with CCCV at each step, cut off at C/SO) of both polymerbinders, PBuPy and PBuPy- MAA, in …
FIG. 5 illustrates the cycling performance at C/3 (running with CCCV at each step, cut off at 1 hour) of both polymerbinders, PBuPy and PBuPy-MAA, in …
FIG. 6A illustrates the cycling performance at C/1 0 (running with CC) of PBuPy-MAA with Si in high- l oading anode as area capacity (m Ah/SVG …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A composite electrode for use in a lithium-ion battery, the composite electrode comprising: a silicon-graphene active material with a specific capacity between 500 and 3500 mAh/g; and a conductive polymer binder, wherein the conductive polymer binder has a polymeric composition with repeating units of the formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.1.svg 3.48 3.46 Black and white SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.2.svg 0.16 5.07 Black and white Original
The composite electrode of claim 1, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of silicon-graphene active material. Original
The composite electrode of claim 1, wherein the silicon-graphene active material contains about 10 to 99 wt % of Si and about 1 to 90 wt % of C. Original
The composite electrode of claim 1, wherein the electrode further comprises a graphene additive. Original
The composite electrode of claim I, wherein the n/m ratio is 7/3. Original
The composite electrode of claim I, wherein the conductive polymer binder is a copolymer of 1-pyrenebutyl methacrylate and methacrylic acid. Original
The composite electrode of claim 3, wherein the methacrylic acid present in the copolymer is in an amount from about 30 to 78 mol% and the 1-pyrenebutyl methacrylate present in the copolymer is in an amount from about 22 to 70 mo l%. Original
The composite electrode of claim 3, wherein the methacrylic acid present in the copolymer is in an amount from about 10 to 51 wt % and the 1-pyrenebutyl methacrylate present in the copolymer is in an amount from about 49 to 90 wt %. Original
A composite electrode for use in a lithium-ion battery, the composite electrode comprising: a silicon-graphene active material with a specific capacity between 500 and 3500 mAh/g; and a conductive polymer binder, wherein the conductive polymer binder is poly (1- pyrenebutyl methacrylate) having the following formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.3.svg 3.48 2.39 Black and white wherein n is between 10 and up to 10 million. Original
The composite electrode of claim 10, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of silicon-graphene active material. Original
The composite electrode of claim 10, wherein the electrode further comprises a graphene additive. Original
A method for making a composite electrode for use in a lithium ion battery, the method comprising the steps of: forming a solution of a solvent and a conductive polymer binder; adding a silicon-graphene active material to the solution to form a slurry; mixing the slurry to form a homogeneous mixture; depositing a thin film of said thus obtained mixture over top of a substrate; and drying the resulting composite to form said electrode, wherein the conductive polymer binder has a polymeric composition with repeating units of the formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.4.svg 3.52 3.5 Black and white wherein n+m is between 10 and up to 10 million; n/m ratio is 9/1 to 1/9. Currently amended
The method of claim 13 4 4, wherein the n/m ratio is 7/3. Currently amended
The method of claim 13 4 4, wherein the conductive polymer binder is a copolymer of 1-pyrenebutyl methacrylate and methacrylic acid. Currently amended
The method of claim 13, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of sil i con-graphene active material. Original
The method of claim 13, wherein the electrode further comprises a graphene additive. Original
. Canceled
A method for making a composite electrode for use in a lithium ion battery, the method comprising the steps of: forming a solution of a solvent and a conductive polymer binder, adding a silicon-graphene active material to the solution to form a slurry; mixing the slurry to form a homogeneous mixture; depositing a thin film of said thus obtained mixture over top of a substrate; and drying the resulting composite to form said electrode, wherein the conductive polymer binder is poly (1-pyrenebutyl methacrylate) having the following formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.5.svg 3.48 2.39 Black and white wherein n is between 10 and up to 10 million. Currently amended
Embodiments described in the patent, grouped by the materials and process steps they use.
4 materials
Starting chemicals for conductive polymer synthesis purchased from Sigma-Aldrich. Electrolytes (LiPF₆ in EC/DEC/FEC) from Novolyte Technologies/BASF. Celgard 3501 separator used. Silicon-graphene active material obtained from XG Sciences, Inc. Electrode laminates made with conductive polymer binders and active anode materials in NMP-based slurry.
4 materials1 process step
0.1 g of PBuPy-MAA binder added to 1 g NMP, ultrasonicated 10-15 min to form homogeneous solution. Then 0.8 g silicon-graphene composite (48% Si, 52% C, Gen 1.5 from XG Sciences) and 0.1 g graphene added, followed by 1.2 g remaining NMP. Mixed by homogenizer at 2500 rpm for 1 hour.
1 material1 process step
1-Pyrenebutanol (6 g) dissolved in anhydrous CH₂Cl₂ (120 mL). Triethylamine (12 mL) and pyridine (5 mL) added; cooled to 0°C. Methacryloyl chloride (8.8 g) added dropwise. Stirred 1 hour, worked up with aqueous HCl (1M), NaHCO₃ (5%), brine. Solvent removed and crude recrystallized from methanol to give white powder (4.8 g, 64%). Confirmed by 1H NMR and MALDI-TOF MS (calc. 342.44, found 342.07).
1 material1 process step
1-Pyrenebutyl methacrylate (1 g) dissolved in freshly distilled THF (10 mL). AIBN (9.7 mg) added. Degassed by three freeze-evacuate-thaw cycles, heated to 60°C for 24 hours. Purified by precipitation with diethyl ether (0.9 g product). Mn = 7.3 kDa, PDI = 2.9 by GPC (CHCl3, polystyrene standards).
1 material1 process step
Copolymerization of 1-pyrenebutyl methacrylate and methacrylic acid to yield PBuPy-MAA conductive polymer binder, as referenced to US Patent No. 9,153,353.
Layer stacks claimed or described, ordered top of device to substrate.
silicon-graphene composite anode for lithium-ion battery
Materials described outside the worked examples.
methacrylic acid
C₄H₆O₂
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 C and 1 D. Based o n these SEM images, it has shown that with both polymer binders, the PBuPy homopolymer and the PBuPy-MAA c opolymer, which …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Specific Capacity | 500–3500 mAh/g | silicon-graphene active material |
Molecular Weight Mn | 7.3 kDa |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,403,897Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 C and 1 D. Based o n these SEM images, it has shown that with both polymer binders, the PBuPy homopolymer and the PBuPy-MAA c opolymer, which …
FIG. 2A illustrates the cycling perf orm ance at C/1 0 (running with CC) of both PBuPy and PBuPy- M AA in high-loading anode as area capacity (mAh/SVG …
FIG. 3A illustrates the cycling performance at C/3 (running with CC) of both PBuPy and PBuPy-MAA in h i gh-l oa ding ano de as area cap aci ty (mAh/SVG …
FIG. 4 illustrates the cycling performance at C/3 (running with CCCV at each step, cut off at C/SO) of both polymerbinders, PBuPy and PBuPy- MAA, in …
FIG. 5 illustrates the cycling performance at C/3 (running with CCCV at each step, cut off at 1 hour) of both polymerbinders, PBuPy and PBuPy-MAA, in …
FIG. 6A illustrates the cycling performance at C/1 0 (running with CC) of PBuPy-MAA with Si in high- l oading anode as area capacity (m Ah/SVG …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A composite electrode for use in a lithium-ion battery, the composite electrode comprising: a silicon-graphene active material with a specific capacity between 500 and 3500 mAh/g; and a conductive polymer binder, wherein the conductive polymer binder has a polymeric composition with repeating units of the formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.1.svg 3.48 3.46 Black and white SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.2.svg 0.16 5.07 Black and white Original
The composite electrode of claim 1, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of silicon-graphene active material. Original
The composite electrode of claim 1, wherein the silicon-graphene active material contains about 10 to 99 wt % of Si and about 1 to 90 wt % of C. Original
The composite electrode of claim 1, wherein the electrode further comprises a graphene additive. Original
The composite electrode of claim I, wherein the n/m ratio is 7/3. Original
The composite electrode of claim I, wherein the conductive polymer binder is a copolymer of 1-pyrenebutyl methacrylate and methacrylic acid. Original
The composite electrode of claim 3, wherein the methacrylic acid present in the copolymer is in an amount from about 30 to 78 mol% and the 1-pyrenebutyl methacrylate present in the copolymer is in an amount from about 22 to 70 mo l%. Original
The composite electrode of claim 3, wherein the methacrylic acid present in the copolymer is in an amount from about 10 to 51 wt % and the 1-pyrenebutyl methacrylate present in the copolymer is in an amount from about 49 to 90 wt %. Original
A composite electrode for use in a lithium-ion battery, the composite electrode comprising: a silicon-graphene active material with a specific capacity between 500 and 3500 mAh/g; and a conductive polymer binder, wherein the conductive polymer binder is poly (1- pyrenebutyl methacrylate) having the following formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.3.svg 3.48 2.39 Black and white wherein n is between 10 and up to 10 million. Original
The composite electrode of claim 10, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of silicon-graphene active material. Original
The composite electrode of claim 10, wherein the electrode further comprises a graphene additive. Original
A method for making a composite electrode for use in a lithium ion battery, the method comprising the steps of: forming a solution of a solvent and a conductive polymer binder; adding a silicon-graphene active material to the solution to form a slurry; mixing the slurry to form a homogeneous mixture; depositing a thin film of said thus obtained mixture over top of a substrate; and drying the resulting composite to form said electrode, wherein the conductive polymer binder has a polymeric composition with repeating units of the formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.4.svg 3.52 3.5 Black and white wherein n+m is between 10 and up to 10 million; n/m ratio is 9/1 to 1/9. Currently amended
The method of claim 13 4 4, wherein the n/m ratio is 7/3. Currently amended
The method of claim 13 4 4, wherein the conductive polymer binder is a copolymer of 1-pyrenebutyl methacrylate and methacrylic acid. Currently amended
The method of claim 13, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of sil i con-graphene active material. Original
The method of claim 13, wherein the electrode further comprises a graphene additive. Original
. Canceled
A method for making a composite electrode for use in a lithium ion battery, the method comprising the steps of: forming a solution of a solvent and a conductive polymer binder, adding a silicon-graphene active material to the solution to form a slurry; mixing the slurry to form a homogeneous mixture; depositing a thin film of said thus obtained mixture over top of a substrate; and drying the resulting composite to form said electrode, wherein the conductive polymer binder is poly (1-pyrenebutyl methacrylate) having the following formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.5.svg 3.48 2.39 Black and white wherein n is between 10 and up to 10 million. Currently amended
Embodiments described in the patent, grouped by the materials and process steps they use.
4 materials
Starting chemicals for conductive polymer synthesis purchased from Sigma-Aldrich. Electrolytes (LiPF₆ in EC/DEC/FEC) from Novolyte Technologies/BASF. Celgard 3501 separator used. Silicon-graphene active material obtained from XG Sciences, Inc. Electrode laminates made with conductive polymer binders and active anode materials in NMP-based slurry.
4 materials1 process step
0.1 g of PBuPy-MAA binder added to 1 g NMP, ultrasonicated 10-15 min to form homogeneous solution. Then 0.8 g silicon-graphene composite (48% Si, 52% C, Gen 1.5 from XG Sciences) and 0.1 g graphene added, followed by 1.2 g remaining NMP. Mixed by homogenizer at 2500 rpm for 1 hour.
1 material1 process step
1-Pyrenebutanol (6 g) dissolved in anhydrous CH₂Cl₂ (120 mL). Triethylamine (12 mL) and pyridine (5 mL) added; cooled to 0°C. Methacryloyl chloride (8.8 g) added dropwise. Stirred 1 hour, worked up with aqueous HCl (1M), NaHCO₃ (5%), brine. Solvent removed and crude recrystallized from methanol to give white powder (4.8 g, 64%). Confirmed by 1H NMR and MALDI-TOF MS (calc. 342.44, found 342.07).
1 material1 process step
1-Pyrenebutyl methacrylate (1 g) dissolved in freshly distilled THF (10 mL). AIBN (9.7 mg) added. Degassed by three freeze-evacuate-thaw cycles, heated to 60°C for 24 hours. Purified by precipitation with diethyl ether (0.9 g product). Mn = 7.3 kDa, PDI = 2.9 by GPC (CHCl3, polystyrene standards).
1 material1 process step
Copolymerization of 1-pyrenebutyl methacrylate and methacrylic acid to yield PBuPy-MAA conductive polymer binder, as referenced to US Patent No. 9,153,353.
Layer stacks claimed or described, ordered top of device to substrate.
silicon-graphene composite anode for lithium-ion battery
Materials described outside the worked examples.
methacrylic acid
C₄H₆O₂
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 C and 1 D. Based o n these SEM images, it has shown that with both polymer binders, the PBuPy homopolymer and the PBuPy-MAA c opolymer, which …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Specific Capacity | 500–3500 mAh/g | silicon-graphene active material |
Molecular Weight Mn | 7.3 kDa |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,403,897Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 C and 1 D. Based o n these SEM images, it has shown that with both polymer binders, the PBuPy homopolymer and the PBuPy-MAA c opolymer, which …
FIG. 2A illustrates the cycling perf orm ance at C/1 0 (running with CC) of both PBuPy and PBuPy- M AA in high-loading anode as area capacity (mAh/SVG …
FIG. 3A illustrates the cycling performance at C/3 (running with CC) of both PBuPy and PBuPy-MAA in h i gh-l oa ding ano de as area cap aci ty (mAh/SVG …
FIG. 4 illustrates the cycling performance at C/3 (running with CCCV at each step, cut off at C/SO) of both polymerbinders, PBuPy and PBuPy- MAA, in …
FIG. 5 illustrates the cycling performance at C/3 (running with CCCV at each step, cut off at 1 hour) of both polymerbinders, PBuPy and PBuPy-MAA, in …
FIG. 6A illustrates the cycling performance at C/1 0 (running with CC) of PBuPy-MAA with Si in high- l oading anode as area capacity (m Ah/SVG …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A composite electrode for use in a lithium-ion battery, the composite electrode comprising: a silicon-graphene active material with a specific capacity between 500 and 3500 mAh/g; and a conductive polymer binder, wherein the conductive polymer binder has a polymeric composition with repeating units of the formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.1.svg 3.48 3.46 Black and white SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.2.svg 0.16 5.07 Black and white Original
The composite electrode of claim 1, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of silicon-graphene active material. Original
The composite electrode of claim 1, wherein the silicon-graphene active material contains about 10 to 99 wt % of Si and about 1 to 90 wt % of C. Original
The composite electrode of claim 1, wherein the electrode further comprises a graphene additive. Original
The composite electrode of claim I, wherein the n/m ratio is 7/3. Original
The composite electrode of claim I, wherein the conductive polymer binder is a copolymer of 1-pyrenebutyl methacrylate and methacrylic acid. Original
The composite electrode of claim 3, wherein the methacrylic acid present in the copolymer is in an amount from about 30 to 78 mol% and the 1-pyrenebutyl methacrylate present in the copolymer is in an amount from about 22 to 70 mo l%. Original
The composite electrode of claim 3, wherein the methacrylic acid present in the copolymer is in an amount from about 10 to 51 wt % and the 1-pyrenebutyl methacrylate present in the copolymer is in an amount from about 49 to 90 wt %. Original
A composite electrode for use in a lithium-ion battery, the composite electrode comprising: a silicon-graphene active material with a specific capacity between 500 and 3500 mAh/g; and a conductive polymer binder, wherein the conductive polymer binder is poly (1- pyrenebutyl methacrylate) having the following formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.3.svg 3.48 2.39 Black and white wherein n is between 10 and up to 10 million. Original
The composite electrode of claim 10, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of silicon-graphene active material. Original
The composite electrode of claim 10, wherein the electrode further comprises a graphene additive. Original
A method for making a composite electrode for use in a lithium ion battery, the method comprising the steps of: forming a solution of a solvent and a conductive polymer binder; adding a silicon-graphene active material to the solution to form a slurry; mixing the slurry to form a homogeneous mixture; depositing a thin film of said thus obtained mixture over top of a substrate; and drying the resulting composite to form said electrode, wherein the conductive polymer binder has a polymeric composition with repeating units of the formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.4.svg 3.52 3.5 Black and white wherein n+m is between 10 and up to 10 million; n/m ratio is 9/1 to 1/9. Currently amended
The method of claim 13 4 4, wherein the n/m ratio is 7/3. Currently amended
The method of claim 13 4 4, wherein the conductive polymer binder is a copolymer of 1-pyrenebutyl methacrylate and methacrylic acid. Currently amended
The method of claim 13, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of sil i con-graphene active material. Original
The method of claim 13, wherein the electrode further comprises a graphene additive. Original
. Canceled
A method for making a composite electrode for use in a lithium ion battery, the method comprising the steps of: forming a solution of a solvent and a conductive polymer binder, adding a silicon-graphene active material to the solution to form a slurry; mixing the slurry to form a homogeneous mixture; depositing a thin film of said thus obtained mixture over top of a substrate; and drying the resulting composite to form said electrode, wherein the conductive polymer binder is poly (1-pyrenebutyl methacrylate) having the following formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.5.svg 3.48 2.39 Black and white wherein n is between 10 and up to 10 million. Currently amended
Embodiments described in the patent, grouped by the materials and process steps they use.
4 materials
Starting chemicals for conductive polymer synthesis purchased from Sigma-Aldrich. Electrolytes (LiPF₆ in EC/DEC/FEC) from Novolyte Technologies/BASF. Celgard 3501 separator used. Silicon-graphene active material obtained from XG Sciences, Inc. Electrode laminates made with conductive polymer binders and active anode materials in NMP-based slurry.
4 materials1 process step
0.1 g of PBuPy-MAA binder added to 1 g NMP, ultrasonicated 10-15 min to form homogeneous solution. Then 0.8 g silicon-graphene composite (48% Si, 52% C, Gen 1.5 from XG Sciences) and 0.1 g graphene added, followed by 1.2 g remaining NMP. Mixed by homogenizer at 2500 rpm for 1 hour.
1 material1 process step
1-Pyrenebutanol (6 g) dissolved in anhydrous CH₂Cl₂ (120 mL). Triethylamine (12 mL) and pyridine (5 mL) added; cooled to 0°C. Methacryloyl chloride (8.8 g) added dropwise. Stirred 1 hour, worked up with aqueous HCl (1M), NaHCO₃ (5%), brine. Solvent removed and crude recrystallized from methanol to give white powder (4.8 g, 64%). Confirmed by 1H NMR and MALDI-TOF MS (calc. 342.44, found 342.07).
1 material1 process step
1-Pyrenebutyl methacrylate (1 g) dissolved in freshly distilled THF (10 mL). AIBN (9.7 mg) added. Degassed by three freeze-evacuate-thaw cycles, heated to 60°C for 24 hours. Purified by precipitation with diethyl ether (0.9 g product). Mn = 7.3 kDa, PDI = 2.9 by GPC (CHCl3, polystyrene standards).
1 material1 process step
Copolymerization of 1-pyrenebutyl methacrylate and methacrylic acid to yield PBuPy-MAA conductive polymer binder, as referenced to US Patent No. 9,153,353.
Layer stacks claimed or described, ordered top of device to substrate.
silicon-graphene composite anode for lithium-ion battery
Materials described outside the worked examples.
methacrylic acid
C₄H₆O₂
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 C and 1 D. Based o n these SEM images, it has shown that with both polymer binders, the PBuPy homopolymer and the PBuPy-MAA c opolymer, which …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Specific Capacity | 500–3500 mAh/g | silicon-graphene active material |
Molecular Weight Mn | 7.3 kDa |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,403,897Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 C and 1 D. Based o n these SEM images, it has shown that with both polymer binders, the PBuPy homopolymer and the PBuPy-MAA c opolymer, which …
FIG. 2A illustrates the cycling perf orm ance at C/1 0 (running with CC) of both PBuPy and PBuPy- M AA in high-loading anode as area capacity (mAh/SVG …
FIG. 3A illustrates the cycling performance at C/3 (running with CC) of both PBuPy and PBuPy-MAA in h i gh-l oa ding ano de as area cap aci ty (mAh/SVG …
FIG. 4 illustrates the cycling performance at C/3 (running with CCCV at each step, cut off at C/SO) of both polymerbinders, PBuPy and PBuPy- MAA, in …
FIG. 5 illustrates the cycling performance at C/3 (running with CCCV at each step, cut off at 1 hour) of both polymerbinders, PBuPy and PBuPy-MAA, in …
FIG. 6A illustrates the cycling performance at C/1 0 (running with CC) of PBuPy-MAA with Si in high- l oading anode as area capacity (m Ah/SVG …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A composite electrode for use in a lithium-ion battery, the composite electrode comprising: a silicon-graphene active material with a specific capacity between 500 and 3500 mAh/g; and a conductive polymer binder, wherein the conductive polymer binder has a polymeric composition with repeating units of the formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.1.svg 3.48 3.46 Black and white SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.2.svg 0.16 5.07 Black and white Original
The composite electrode of claim 1, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of silicon-graphene active material. Original
The composite electrode of claim 1, wherein the silicon-graphene active material contains about 10 to 99 wt % of Si and about 1 to 90 wt % of C. Original
The composite electrode of claim 1, wherein the electrode further comprises a graphene additive. Original
The composite electrode of claim I, wherein the n/m ratio is 7/3. Original
The composite electrode of claim I, wherein the conductive polymer binder is a copolymer of 1-pyrenebutyl methacrylate and methacrylic acid. Original
The composite electrode of claim 3, wherein the methacrylic acid present in the copolymer is in an amount from about 30 to 78 mol% and the 1-pyrenebutyl methacrylate present in the copolymer is in an amount from about 22 to 70 mo l%. Original
The composite electrode of claim 3, wherein the methacrylic acid present in the copolymer is in an amount from about 10 to 51 wt % and the 1-pyrenebutyl methacrylate present in the copolymer is in an amount from about 49 to 90 wt %. Original
A composite electrode for use in a lithium-ion battery, the composite electrode comprising: a silicon-graphene active material with a specific capacity between 500 and 3500 mAh/g; and a conductive polymer binder, wherein the conductive polymer binder is poly (1- pyrenebutyl methacrylate) having the following formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.3.svg 3.48 2.39 Black and white wherein n is between 10 and up to 10 million. Original
The composite electrode of claim 10, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of silicon-graphene active material. Original
The composite electrode of claim 10, wherein the electrode further comprises a graphene additive. Original
A method for making a composite electrode for use in a lithium ion battery, the method comprising the steps of: forming a solution of a solvent and a conductive polymer binder; adding a silicon-graphene active material to the solution to form a slurry; mixing the slurry to form a homogeneous mixture; depositing a thin film of said thus obtained mixture over top of a substrate; and drying the resulting composite to form said electrode, wherein the conductive polymer binder has a polymeric composition with repeating units of the formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.4.svg 3.52 3.5 Black and white wherein n+m is between 10 and up to 10 million; n/m ratio is 9/1 to 1/9. Currently amended
The method of claim 13 4 4, wherein the n/m ratio is 7/3. Currently amended
The method of claim 13 4 4, wherein the conductive polymer binder is a copolymer of 1-pyrenebutyl methacrylate and methacrylic acid. Currently amended
The method of claim 13, wherein the electrode is comprised of about 1 to 20 wt % of polymer binder and about 80 to 99 wt % of sil i con-graphene active material. Original
The method of claim 13, wherein the electrode further comprises a graphene additive. Original
. Canceled
A method for making a composite electrode for use in a lithium ion battery, the method comprising the steps of: forming a solution of a solvent and a conductive polymer binder, adding a silicon-graphene active material to the solution to form a slurry; mixing the slurry to form a homogeneous mixture; depositing a thin film of said thus obtained mixture over top of a substrate; and drying the resulting composite to form said electrode, wherein the conductive polymer binder is poly (1-pyrenebutyl methacrylate) having the following formula: SVG 15600071.05-06-2019.JVCKMHBRRXEAPX4.CLM.5.svg 3.48 2.39 Black and white wherein n is between 10 and up to 10 million. Currently amended
Embodiments described in the patent, grouped by the materials and process steps they use.
4 materials
Starting chemicals for conductive polymer synthesis purchased from Sigma-Aldrich. Electrolytes (LiPF₆ in EC/DEC/FEC) from Novolyte Technologies/BASF. Celgard 3501 separator used. Silicon-graphene active material obtained from XG Sciences, Inc. Electrode laminates made with conductive polymer binders and active anode materials in NMP-based slurry.
4 materials1 process step
0.1 g of PBuPy-MAA binder added to 1 g NMP, ultrasonicated 10-15 min to form homogeneous solution. Then 0.8 g silicon-graphene composite (48% Si, 52% C, Gen 1.5 from XG Sciences) and 0.1 g graphene added, followed by 1.2 g remaining NMP. Mixed by homogenizer at 2500 rpm for 1 hour.
1 material1 process step
1-Pyrenebutanol (6 g) dissolved in anhydrous CH₂Cl₂ (120 mL). Triethylamine (12 mL) and pyridine (5 mL) added; cooled to 0°C. Methacryloyl chloride (8.8 g) added dropwise. Stirred 1 hour, worked up with aqueous HCl (1M), NaHCO₃ (5%), brine. Solvent removed and crude recrystallized from methanol to give white powder (4.8 g, 64%). Confirmed by 1H NMR and MALDI-TOF MS (calc. 342.44, found 342.07).
1 material1 process step
1-Pyrenebutyl methacrylate (1 g) dissolved in freshly distilled THF (10 mL). AIBN (9.7 mg) added. Degassed by three freeze-evacuate-thaw cycles, heated to 60°C for 24 hours. Purified by precipitation with diethyl ether (0.9 g product). Mn = 7.3 kDa, PDI = 2.9 by GPC (CHCl3, polystyrene standards).
1 material1 process step
Copolymerization of 1-pyrenebutyl methacrylate and methacrylic acid to yield PBuPy-MAA conductive polymer binder, as referenced to US Patent No. 9,153,353.
Layer stacks claimed or described, ordered top of device to substrate.
silicon-graphene composite anode for lithium-ion battery
Materials described outside the worked examples.
methacrylic acid
C₄H₆O₂
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 C and 1 D. Based o n these SEM images, it has shown that with both polymer binders, the PBuPy homopolymer and the PBuPy-MAA c opolymer, which …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Specific Capacity | 500–3500 mAh/g | silicon-graphene active material |
Molecular Weight Mn | 7.3 kDa |
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