Storage battery electrode, manufacturing method thereof, storage battery, electronic device, and graphene

Patent metadata

Field	Value
Publication number	US-11961994-B2
Application number	US-202217588556-A
Country	US
Kind code	B2
Filing date	Jan 31, 2022
Priority date	Aug 27, 2014
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

To provide graphene oxide that has high dispersibility and is easily reduced. To provide graphene with high electron conductivity. To provide a storage battery electrode including an active material layer with high electric conductivity and a manufacturing method thereof. To provide a storage battery with increased discharge capacity. A method for manufacturing a storage battery electrode that is to be provided includes a step of dispersing graphene oxide into a solution containing alcohol or acid, a step of heating the graphene oxide dispersed into the solution, and a step or reducing the graphene oxide.

First claim

What is claimed is:

1. A method for manufacturing a storage battery electrode, comprising the steps of:
dispersing graphene oxide into a solution, the solution containing acid;
heating the graphene oxide in the solution so that an alkyl group is supported by an ether bond in the graphene oxide;
vaporizing a solvent in the solution at a temperature higher than or equal to 60° C. and lower than or equal to 170° C. after heating the graphene oxide; and
forming graphene by reducing the graphene oxide after vaporizing the solvent,
wherein the reducing the graphene oxide is performed by heating the graphene oxide at a temperature higher than or equal to 60° C. and lower than or equal to 170° C.

2. The method for manufacturing a storage battery electrode according to claim 1 ,
wherein the storage battery electrode comprises a current collector and an active material layer, and
wherein the active material layer comprises an active material, the graphene, and a binder.

3. The method for manufacturing a storage battery electrode according to claim 1 ,
wherein the reducing the graphene oxide is performed by heating the graphene oxide for a time period longer than or equal to an hour and shorter than or equal to 30 hours.

4. The method for manufacturing a storage battery electrode according to claim 1 , wherein the acid is carboxylic acid.

5. A method for manufacturing a storage battery electrode, comprising the steps of:
dispersing graphene oxide into a solution, the solution containing alcohol;
heating the graphene oxide in the solution so that an alkyl group is supported by an ether bond in the graphene oxide;
vaporizing a solvent in the solution at a temperature higher than or equal to 60° C. and lower than or equal to 170° C. after heating the graphene oxide; and
forming graphene by reducing the graphene oxide after vaporizing the solvent,
wherein the reducing the graphene oxide is performed by heating the graphene oxide at a temperature higher than or equal to 60° C. and lower than or equal to 170° C.

6. The method for manufacturing a storage battery electrode according to claim 5 ,
wherein the storage battery electrode comprises a current collector and an active material layer, and
wherein the active material layer comprises an active material, the graphene, and a binder.

7. The method for manufacturing a storage battery electrode according to claim 5 ,
wherein the reducing the graphene oxide is performed by heating the graphene oxide for a time period longer than or equal to an hour and shorter than or equal to 30 hours.

8. The method for manufacturing a storage battery electrode according to claim 5 , wherein the alcohol is 1-propanol or 2-propanol.

9. A method for manufacturing a storage battery electrode, comprising the steps of:
dispersing graphene oxide into a solution, the solution containing acid;
heating the graphene oxide in the solution so that an alkyl group is supported by an ester bond in the graphene oxide;
vaporizing a solvent in the solution at a temperature higher than or equal to 60° C. and lower than or equal to 170° C. after heating the graphene oxide; and
forming graphene by reducing the graphene oxide after vaporizing the solvent,
wherein the reducing the graphene oxide is performed by heating the graphene oxide at a temperature higher than or equal to 60° C. and lower than or equal to 170° C.

10. The method for manufacturing a storage battery electrode according to claim 9 ,
wherein the storage battery electrode comprises a current collector and an active material layer, and
wherein the active material layer comprises an active material, the graphene, and a binder.

11. The method for manufacturing a storage battery electrode according to claim 9 ,
wherein the reducing the graphene oxide is performed by heating the graphene oxide for a time period longer than or equal to an hour and shorter than or equal to 30 hours.

12. The method for manufacturing a storage battery electrode according to claim 9 , wherein the acid is carboxylic acid.

13. A method for manufacturing a storage battery electrode, comprising the steps of:
dispersing graphene oxide into a solution, the solution containing alcohol;
heating the graphene oxide in the solution so that an alkyl group is supported by an ester bond in the graphene oxide;
vaporizing a solvent in the solution at a temperature higher than or equal to 60° C. and lower than or equal to 170° C. after heating the graphene oxide; and
forming graphene by reducing the graphene oxide after vaporizing the solvent,
wherein the reducing the graphene oxide is performed by heating the graphene oxide at a temperature higher than or equal to 60° C. and lower than or equal to 170° C.

14. The method for manufacturing a storage battery electrode according to claim 13 ,
wherein the storage battery electrode comprises a current collector and an active material layer, and
wherein the active material layer comprises an active material, the graphene, and a binder.

15. The method for manufacturing a storage battery electrode according to claim 13 ,
wherein the reducing the graphene oxide is performed by heating the graphene oxide for a time period longer than or equal to an hour and shorter than or equal to 30 hours.

16. The method for manufacturing a storage battery electrode according to claim 13 , wherein the alcohol is 1-propanol or 2-propanol.

Assignees

• Semiconductor Energy Lab

Inventors

• Ikenuma Tatsuya
• Yoneda Yumiko

Classifications

• H01M4/133 Primary

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• C01B32/184

  Preparation · CPC title

• H01M4/0416

  involving impregnation with a solution, dispersion, paste or dry powder (H01M4/0438 takes precedence) · CPC title

• H01M4/049

  Manufacturing of an active layer by chemical means · CPC title

• H01M4/1393

  of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title