Slurry composition, and electrode using slurry composition

Patent metadata

Field	Value
Publication number	US-2021194005-A1
Application number	US-201816757934-A
Country	US
Kind code	A1
Filing date	Oct 30, 2018
Priority date	Oct 31, 2017
Publication date	Jun 24, 2021
Grant date	—

Abstract

An organosulfur compound-containing slurry composition for making an electrode. The slurry composition forms an electrode mixture layer that exhibits high adhesion to a current collector even when combined with inexpensive aluminum foil current collector and therefore achieves sufficient capacity. The slurry composition contains an organosulfur compound, a binder, an electroconductive agent, and a solvent and has a pH of 4.0 to 9.0. The slurry composition preferably contains a basic compound. The organosulfur compound is preferably at least one of sulfur-modified elastomer compounds, sulfur-modified polynuclear aromatic compounds, sulfur-modified pitch compounds, sulfur-modified aliphatic hydrocarbon oxides, sulfur-modified polyether compounds, polythienoacene compounds, carbon polysulfide compounds, sulfur-modified polyamide compounds, and sulfur-modified polyacrylonitrile compounds.

First claim

1 . A slurry composition comprising an organosulfur compound, a binder, an electroconductive agent, and a solvent, and having a pH of 4.0 to 9.0.

2 . The slurry composition according to claim 1 , further comprising a basic compound.

3 . The slurry composition according to claim 2 , wherein the basic compound is at least one member selected from the group consisting of ammonia, alkylamine compounds, ethanolamine compounds, polyamine compounds, aromatic amine compounds, alkali metal hydroxides, carbonic salt compounds, carboxylic salt compounds, and phosphoric salt compounds.

4 . The slurry composition according to claim 1 , wherein the organosulfur compound is at least one member selected from the group consisting of sulfur-modified elastomer compounds, sulfur-modified polynuclear aromatic compounds, sulfur-modified pitch compounds, sulfur-modified aliphatic hydrocarbon oxides, sulfur-modified polyether compounds, polythienoacene compounds, carbon polysulfide compounds, sulfur-modified polyamide compounds, and sulfur-modified polyacrylonitrile compounds.

5 . The slurry composition according to claim 1 , wherein the binder and the electroconductive agent are present in amounts of 1 to 30 parts and 0.1 to 50 parts, respectively, by mass per 100 parts by mass of the organosulfur compound.

6 . An electrode comprising a current collector and an electrode mixture layer formed on the current collector, the electrode mixture layer being formed of the slurry composition according to claim 1 .

7 . The electrode according to claim 6 , wherein the current collector is aluminum foil.

8 . The electrode according to claim 6 , being for lithium ion secondary batteries.

9 . The slurry composition according to claim 2 , wherein the organosulfur compound is at least one member selected from the group consisting of sulfur-modified elastomer compounds, sulfur-modified polynuclear aromatic compounds, sulfur-modified pitch compounds, sulfur-modified aliphatic hydrocarbon oxides, sulfur-modified polyether compounds, polythienoacene compounds, carbon polysulfide compounds, sulfur-modified polyamide compounds, and sulfur-modified polyacrylonitrile compounds.

10 . The slurry composition according to claim 3 , wherein the organosulfur compound is at least one member selected from the group consisting of sulfur-modified elastomer compounds, sulfur-modified polynuclear aromatic compounds, sulfur-modified pitch compounds, sulfur-modified aliphatic hydrocarbon oxides, sulfur-modified polyether compounds, polythienoacene compounds, carbon polysulfide compounds, sulfur-modified polyamide compounds, and sulfur-modified polyacrylonitrile compounds.

11 . The slurry composition according to claim 2 , wherein the binder and the electroconductive agent are present in amounts of 1 to 30 parts and 0.1 to 50 parts, respectively, by mass per 100 parts by mass of the organosulfur compound.

12 . The slurry composition according to claim 3 , wherein the binder and the electroconductive agent are present in amounts of 1 to 30 parts and 0.1 to 50 parts, respectively, by mass per 100 parts by mass of the organosulfur compound.

13 . The slurry composition according to claim 4 , wherein the binder and the electroconductive agent are present in amounts of 1 to 30 parts and 0.1 to 50 parts, respectively, by mass per 100 parts by mass of the organosulfur compound.

14 . An electrode comprising a current collector and an electrode mixture layer formed on the current collector, the electrode mixture layer being formed of the slurry composition according to claim 2 .

15 . An electrode comprising a current collector and an electrode mixture layer formed on the current collector, the electrode mixture layer being formed of the slurry composition according to claim 3 .

16 . An electrode comprising a current collector and an electrode mixture layer formed on the current collector, the electrode mixture layer being formed of the slurry composition according to claim 4 .

17 . An electrode comprising a current collector and an electrode mixture layer formed on the current collector, the electrode mixture layer being formed of the slurry composition according to claim 5 .

18 . The electrode according to claim 7 , being for lithium ion secondary batteries.

19 . The slurry composition according to claim 9 , wherein the binder and the electroconductive agent are present in amounts of 1 to 30 parts and 0.1 to 50 parts, respectively, by mass per 100 parts by mass of the organosulfur compound.

20 . The slurry composition according to claim 10 , wherein the binder and the electroconductive agent are present in amounts of 1 to 30 parts and 0.1 to 50 parts, respectively, by mass per 100 parts by mass of the organosulfur compound.

Assignees

• Adeka Corp

Inventors

• Kakiage Kenji
• Takenouchi Hiromi
• Hamasaki Yuki

Classifications

• H01M4/0404

  by coating on electrode collectors · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/5815

  Sulfides · CPC title

• H01M4/622

  being polymers · CPC title

• H01M4/137 Primary

  Electrodes based on electro-active polymers · CPC title