Polythiophene derivative, method for producing same, positive electrode active material for secondary batteries, and secondary battery

Patent metadata

Field	Value
Publication number	US-9991518-B2
Application number	US-201515106562-A
Country	US
Kind code	B2
Filing date	Jan 13, 2015
Priority date	Jan 28, 2014
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A polythiophene derivative including
a repeating unit represented by General Formula (1) below:

where R 1 and R 2 each independently denote a group having from 2 through 9 carbon atoms represented by —(R 3 —S) p —R 4 (where R 3 denotes an alkylene group having from 1 through 4 carbon atoms, R 4 denotes an alkyl group having from 1 through 6 carbon atoms or an aromatic group having from 5 through 6 carbon atoms, and p denotes an integer of 1 or 2), Ar denotes an optionally substituted divalent or monovalent aromatic ring moiety or aromatic heterocyclic moiety, m denotes a natural number of 2 or more, and n denotes a natural number of 0 or 2 or more.

First claim

The invention claimed is:

1. A polythiophene derivative comprising
a repeating unit represented by General Formula (1) below:

where R 1 and R 2 each independently denote a group having from 2 through 9 carbon atoms represented by —(R 3 —S) p —R 4 (where R 3 denotes an alkylene group having from 1 through 4 carbon atoms, R 4 denotes an alkyl group having from 1 through 6 carbon atoms or an aromatic group having from 5 through 6 carbon atoms, and p denotes an integer of 1 or 2), Ar denotes an optionally substituted divalent or monovalent aromatic ring moiety or aromatic heterocyclic moiety, m denotes a natural number of 2 or more, and n denotes a natural number of 0 or 2 or more.

2. The polythiophene derivative according to claim 1 , wherein the Ar is a thiophene derivative moiety.

3. A method for producing a polythiophene derivative, the method comprising
polymerizing raw material monomers with an oxidizing agent to produce the polythiophene derivative according to claim 1 .

4. A cathode active material for a secondary battery, the cathode active material comprising
the polythiophene derivative according to claim 1 .

5. A secondary battery comprising
the cathode active material for a secondary battery according to claim 4 .

Assignees

• Nomura Masayoshi
• Ricoh Co Ltd

Inventors

• Nomura Masayoshi

Classifications

• C08G2261/43

  Chemical oxidative coupling reactions, e.g. with FeCl3 · CPC title

• C08G2261/312

  Non-condensed aromatic systems, e.g. benzene · CPC title

• C08G2261/3223

  containing one or more sulfur atoms as the only heteroatom, e.g. thiophene · CPC title

• C08G2261/514

  Electron transport · CPC title

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title