Positive electrode with lead member for electrochemical devices, method for producing same and electrochemical device

Patent metadata

Field	Value
Publication number	US-2018375084-A1
Application number	US-201816120337-A
Country	US
Kind code	A1
Filing date	Sep 3, 2018
Priority date	Mar 22, 2016
Publication date	Dec 27, 2018
Grant date	—

Abstract

An electrochemical device positive electrode with a lead member includes a positive electrode and a lead member attached to the positive electrode. The positive electrode includes a positive current collector, a carbon layer, and an active layer. The carbon layer is disposed on a surface of the positive current collector, and contains a conductive carbon material. The active layer is supported by the positive current collector via the carbon layer disposed between the active layer and the positive current collector, and contains a conductive polymer. The lead member is in contact with the carbon layer.

First claim

What is claimed is:

1 . An electrochemical device positive electrode with a lead member, the electrochemical device positive electrode comprising:
a positive electrode; and a lead member attached to the positive electrode, wherein: the positive electrode includes:
a positive current collector;
a carbon layer that is disposed on a surface of the positive current collector, the carbon layer containing a conductive carbon material; and
an active layer that is supported by the positive current collector via the carbon layer disposed between the active layer and the positive current collector, the active layer containing a conductive polymer, and
the lead member is in contact with the carbon layer.

2 . The electrochemical device positive electrode with a lead member according to claim 1 , wherein:
the carbon layer includes a composite region of the conductive carbon material and the conductive polymer, and the lead member is in contact with the composite region.

3 . The electrochemical device positive electrode with a lead member according to claim 1 , wherein the carbon layer disposed between the lead member and the positive current collector has a thickness of less than or equal to 5 μm.

4 . An electrochemical device comprising:
the electrochemical device positive electrode with a lead member according to claim 1 ; a negative electrode; and a nonaqueous electrolytic solution.

5 . A method for producing an electrochemical device positive electrode with a lead member, the method comprising:
forming a first intermediate body by forming, on a surface of a positive current collector, a carbon layer containing a conductive carbon material; forming a second intermediate body by making the positive current collector support an active layer containing a conductive polymer via the carbon layer disposed between the positive current collector and the active layer; exposing part of the carbon layer by removing part of the active layer from the second intermediate body; and attaching a lead member so as to be in contact with the part of the carbon layer which is exposed.

6 . The method for producing the electrochemical device positive electrode with a lead member according to claim 5 , wherein the forming of the second intermediate body includes forming the active layer containing the conductive polymer by performing electrolytic polymerization of a raw material monomer contained in a reaction solution while the first intermediate body is immersed in the reaction solution.

7 . The method for producing the electrochemical device positive electrode with a lead member according to claim 5 , wherein the forming of the second intermediate body includes forming, in the carbon layer, a composite region of the conductive carbon material and the conductive polymer.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Furusawa Shigetaka
• Ito Yasuyuki
• Nomoto Susumu
• Matsumura Nao

Classifications

• H01G11/86 Primary

  specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34) · CPC title

• H01M50/536

  characterised by the method of fixing the leads to the electrodes, e.g. by welding · CPC title

• H01M50/533

  characterised by the shape of the leads or tabs · CPC title

• H01M50/534

  characterised by the material of the leads or tabs · CPC title

• H01G11/66

  Current collectors · CPC title