Method for forming electrode, electrode, storage battery, and electric device

Patent metadata

Field	Value
Publication number	US-2022045330-A1
Application number	US-202117511108-A
Country	US
Kind code	A1
Filing date	Oct 26, 2021
Priority date	May 29, 2014
Publication date	Feb 10, 2022
Grant date	—

Abstract

An electrode improved for achieving a storage battery having both a high electrode strength and favorable electrode conductivity is provided. The electrode includes graphene and a modified polymer in an active material layer or includes a layer substantially formed of carbon particles and an active material layer including a modified polymer over a current collector. The modified polymer has a poly(vinylidene fluoride) structure and partly has a polyene structure or an aromatic ring structure. The polyene structure or the aromatic ring structure is sandwiched between poly(vinylidene fluoride) structures.

First claim

What is claimed is:

1 . A method for forming an electrode comprising:
forming a mixture comprising an active material particle, graphene oxide, and a poly(vinylidene fluoride); providing the mixture over a current collector; and dehydrofluorinating the poly(vinylidene fluoride) by treating the mixture in a solution comprising a polar solvent and a reducing agent.

2 . The method for forming an electrode according to claim 1 , wherein the polar solvent comprises at least one of water, methanol, ethanol, acetone, tetrahydrofuran, dimethylformamide, 1-methyl-2-pyrrolidone and dimethyl sulfoxide.

3 . The method for forming an electrode according to claim 1 , wherein the reducing agent is a material having a LUMO level of higher than or equal to −5.0 eV and lower than or equal to −3.8 eV.

4 . The method for forming an electrode according to claim 1 , wherein the reducing agent comprises at least one of ascorbic acid, hydrazine, dimethyl hydrazine, hydroquinone, tetra-butyl ammonium bromide, NaBH 4 and N,N-diethylhydroxylamine.

5 . The method for forming an electrode according to claim 1 ,
wherein a polyene structure or an aromatic ring structure is formed in the poly(vinylidene fluoride) by the dehydrofluorination.

6 . A method for forming an electrode comprising:
forming a layer over a metal layer, the layer comprising a carbon particle;
forming a mixture comprising an active material particle and a poly(vinylidene fluoride);
providing the mixture over the layer; and
dehydrofluorinating the poly(vinylidene fluoride) by treating the mixture in a solution comprising a polar solvent and a reducing agent.

7 . The method for forming an electrode according to claim 6 , wherein the polar solvent comprises at least one of water, methanol, ethanol, acetone, tetrahydrofuran, dimethylformamide, 1-methyl-2-pyrrolidone and dimethyl sulfoxide.

8 . The method for forming an electrode according to claim 6 , wherein the reducing agent is a material having a LUMO level of higher than or equal to −5.0 eV and lower than or equal to −3.8 eV.

9 . The method for forming an electrode according to claim 6 , wherein the reducing agent comprises at least one of ascorbic acid, hydrazine, dimethyl hydrazine, hydroquinone, tetra-butyl ammonium bromide, NaBH 4 and N,N-diethylhydroxylamine.

10 . The method for forming an electrode according to claim 6 ,
wherein a polyene structure or an aromatic ring structure is formed in the poly(vinylidene fluoride) by the dehydrofluorination.

Assignees

• Semiconductor Energy Lab

Inventors

• Ikenuma Tatsuya

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title

• H01M4/133

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

• H01M4/623 Primary

  fluorinated polymers · CPC title

• H01M4/04

  Processes of manufacture in general · CPC title