Particulate active material, power storage device positive electrode, power storage device, and production method for particulate active material

Patent metadata

Field	Value
Publication number	US-10734645-B2
Application number	US-201715841783-A
Country	US
Kind code	B2
Filing date	Dec 14, 2017
Priority date	Nov 13, 2012
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A particulate active material for a power storage device positive electrode having a higher energy density is provided, which includes particles of an electrically conductive polymer and a conductive agent, wherein the electrically conductive polymer particles each have a surface coated with the conductive agent.

First claim

The invention claimed is:

1. A particulate active material for a power storage device positive electrode, the particulate active material consisting of:
particles of an electrically conductive polymer; and
a conductive agent;
wherein the electrically conductive polymer is a polymer containing inorganic acid anion as a dopant; and
wherein the particles of the electrically conductive polymer each have a surface coated with the conductive agent;
wherein the conductive agent is present in a proportion of 1 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer.

2. The particulate active material according to claim 1 , wherein the electrically conductive polymer is a polyaniline or a polyaniline derivative.

3. The particulate active material according to claim 1 , wherein the conductive agent is present in a proportion of 13 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer.

4. A power storage device positive electrode comprising the particulate active material according to claim 1 .

5. The power storage device positive electrode according to claim 4 , wherein the conductive agent is present in a proportion of 1 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer in the active material.

6. The power storage device positive electrode according to claim 4 , wherein the electrically conductive polymer is a polyaniline or a polyaniline derivative.

7. The power storage device positive electrode according to claim 4 , wherein the conductive agent is present in a proportion of 13 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer.

8. A power storage device comprising:
an electrolyte layer; and
a positive electrode and a negative electrode provided in opposed relation with the electrolyte layer interposed therebetween;
wherein the positive electrode comprises the particulate active material according to claim 1 .

9. The power storage device according to claim 8 , wherein the conductive agent is present in a proportion of 1 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer in the active material.

10. The power storage device according to claim 8 , wherein the electrically conductive polymer is a polyaniline or a polyaniline derivative.

11. The power storage device according to claim 8 , wherein the conductive agent is present in a proportion of 13 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer.

12. A method for producing a particulate active material for a power storage device positive electrode, the particulate active material consisting of:
particles of an electrically conductive polymer; and
a conductive agent;
wherein the electrically conductive polymer a polymer containing inorganic acid anion as a dopant; and
wherein the particles of the electrically conductive polymer each have a surface coated with the conductive agent,
the method comprising the step of shearing the electrically conductive polymer particles and the conductive agent by means of a composite particle producing apparatus to coat surfaces of the electrically conductive polymer particles with the conductive agent;
wherein the conductive agent is present in a proportion of 1 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer.

13. The method according to claim 12 , wherein the electrically conductive polymer is a polyaniline or a polyaniline derivative.

14. The method according to claim 12 , wherein the conductive agent is present in a proportion of 13 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer.

Assignees

• Nitto Denko Corp

Inventors

• Ando Yohei
• Uetani Yoshihiro

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• C08L79/02

  Polyamines · CPC title

• H01M4/366 Primary

  as layered products · CPC title

• H01M4/622

  being polymers · CPC title