Electrochemical device

Patent metadata

Field	Value
Publication number	US-10867754-B2
Application number	US-201716334979-A
Country	US
Kind code	B2
Filing date	Sep 28, 2017
Priority date	Sep 30, 2016
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

According to the present invention, an electrochemical device includes: a positive electrode containing, as a positive electrode active material, a conductive polymer that is to be doped and dedoped with anions, a negative electrode containing a negative electrode active material that occludes and releases lithium ions, and an electrolytic solution containing anions and lithium ions. In a charged state of the electrochemical device, an amount A (mol) of anions that are doped into the conductive polymer and are contained in the positive electrode and an amount B (mol) of the anions contained in the electrolytic solution satisfy a relational expression: 1.1≤B/A≤2.8.

First claim

The invention claimed is:

1. An electrochemical device comprising:
a positive electrode including, as a positive electrode active material, a conductive polymer that is to be doped and dedoped with anions;
a negative electrode including a negative electrode active material that occludes and releases lithium ions; and
an electrolytic solution containing anions and lithium ions,
wherein, in a charged state of the electrochemical device, a following relational expression is satisfied:
1.1≤ B/A≤ 2.8

wherein A is an amount (mol) of anions that are doped into the conductive polymer and are contained in the positive electrode, and
B is an amount (mol) of the anions contained in the electrolytic solution.

2. The electrochemical device according to claim 1 , wherein the conductive polymer is polyaniline.

3. The electrochemical device according to claim 1 , wherein the anions include PF 6 .

4. The electrochemical device according to claim 1 , wherein the electrolytic solution contains dimethyl carbonate and propylene carbonate as solvents.

5. An electrochemical device comprising:
a positive electrode including, as a positive electrode active material, a conductive polymer that is to be doped and dedoped with anions;
a negative electrode including a negative electrode active material that occludes and releases lithium ions; and
an electrolytic solution containing anions and lithium ions,
wherein a following relational expression is satisfied:
1.1≤ D /( C−D )≤2.8

wherein C is an amount (mol) of the anions contained in the electrolytic solution in a discharged state of the electrochemical device, and
D is an amount (mol) of the anions contained in the electrolytic solution in a charged state of the electrochemical device.

6. The electrochemical device according to claim 5 , wherein the conductive polymer is polyaniline.

7. The electrochemical device according to claim 5 , wherein the anions include PF 6 .

8. The electrochemical device according to claim 5 , wherein the electrolytic solution contains dimethyl carbonate and propylene carbonate as solvents.

9. An electrochemical device comprising:
a positive electrode including, as a positive electrode active material, a conductive polymer that is to be doped and dedoped with anions;
a negative electrode including a negative electrode active material that occludes and releases lithium ions; and
an electrolytic solution containing anions and lithium ions,
wherein a following relational expression is satisfied:
0.7≤ F/E≤ 1.3

wherein E is a total amount (mol) of monomer units that constitute the conductive polymer and are contained in the positive electrode, and
F is a total amount (mol) of anions contained in the electrochemical device.

10. The electrochemical device according to claim 9 , wherein the conductive polymer is polyaniline.

11. The electrochemical device according to claim 9 , wherein the anions include PF 6 .

12. The electrochemical device according to claim 9 , wherein the electrolytic solution contains dimethyl carbonate and propylene carbonate as solvents.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Hayashi Hiroki
• Nomoto Susumu

Classifications

• H01M4/0466

  Electrochemical polymerisation · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01G11/62

  characterised by the solute, e.g. salts, anions or cations therein · CPC title

• H01M2300/0051

  Carbonates · CPC title