Secondary cell

Patent metadata

Field	Value
Publication number	US-10320001-B2
Application number	US-201615289502-A
Country	US
Kind code	B2
Filing date	Oct 10, 2016
Priority date	Oct 20, 2015
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

To provide a secondary cell including an electrode active material that is a compound represented by General Formula (1) below:

where n is a natural number of from 4 through 8, a is a natural number of from 1 through 4, R 1 and R 2 may be identical to or different from each other and are each a hydrogen atom, an alkyl group, or an aromatic hydrocarbon group that may have a substituent, Y is a substituent, and b is an integer of from 0 through 3 and a+b is 4 or less in General Formula (1).

First claim

What is claimed is:

1. A secondary cell comprising:
an electrode active material that is a compound represented by General Formula (1) below:

where n is a natural number of from 4 through 8, a is a natural number of from 1 through 4, R 1 and R 2 may be identical to or different from each other and are each a hydrogen atom, an alkyl group, or an aromatic hydrocarbon group that may have a substituent, Y is a substituent, and b is an integer of from 0 through 3 and a+b is 4 or less in General Formula (1),
wherein when n ranges from 4 to 6:
b is at least 1 and at least one Y in General Formula (1) is a substituent selected from the group consisting of a halogen atom, an alkoxy group, an aryl group, —SO 3 X where X is a hydrogen atom or an alkali metal, a sulfonic acid ester group, a carbamoyl group, a formyl group, a carboxyl group, and a carboxylic acid ester group; or
at least one of R 1 and R 2 within General Formula (1) is an alkyl group, or an aromatic hydrocarbon group that may have a substituent.

2. The secondary cell according to claim 1 , wherein at least one of R 1 and R 2 in General Formula (1) are hydrogen atoms.

3. The secondary cell according to claim 1 , wherein Y in General Formula (1) is a hydrogen atom, an alkyl group, an alkoxy group, —SO 3 X, a formyl group, a carboxyl group, or a carboxylic acid ester group, where X in —SO 3 X is a hydrogen atom or an alkali metal.

4. The secondary cell according to claim 1 , wherein Y in General Formula (1) is a hydrogen atom, —SO 3 X, a formyl group, a carboxyl group, or a carboxylic acid ester group, where X in —SO 3 X is a hydrogen atom or an alkali metal.

5. The secondary cell according to claim 1 , wherein b in General Formula (1) is 0.

6. The secondary cell according to claim 1 , wherein n in General Formula (1) is 6 or 8.

7. The secondary cell according to claim 1 , wherein the compound represented by General Formula (1) is at least one selected from the group consisting of compounds represented by structural formulae below:

8. The secondary cell according to claim 1 , wherein the compound represented by General Formula (1) is a cathode active material.

9. The secondary cell according to claim 1 , wherein the compound represented by General Formula (1) undergoes a redox reaction during at least one of a charging process and a discharging process.

10. The secondary cell according to claim 1 , further comprising:
a cathode;
an anode; and
an electrolyte.

11. The secondary cell according to claim 1 , wherein the secondary cell is a lithium ion secondary cell.

Assignees

• Nomura Masayoshi
• Ricoh Co Ltd

Inventors

• Nomura Masayoshi

Classifications

• H01M4/606 Primary

  containing aromatic main chain polymers · CPC title

• H01M10/0525

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

• Y02E60/10

  Energy storage using batteries · CPC title