Method for manufacturing positive electrode including conductive polymer layer selectively formed on surface of carbon layer disposed on current collector for power storage device, and method for manufacturing power storage device

Patent metadata

Field	Value
Publication number	US-10923296-B2
Application number	US-201816115568-A
Country	US
Kind code	B2
Filing date	Aug 29, 2018
Priority date	Mar 10, 2016
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A method for manufacturing a positive electrode for a power storage device includes the steps of: preparing a current collector that includes a first region and a second region on a surface of the current collector, the first region having a carbon layer formed on the surface, the second region having the surface exposed; and forming a conductive polymer layer selectively on a surface of the carbon layer by immersing the current collector in an electrolytic solution containing a raw material monomer and then conducting electrolytic polymerization of the raw material monomer.

First claim

What is claimed is:

1. A method for manufacturing a positive electrode for a power storage device, the method comprising:
preparing a current collector having a sheet-shape, the current collector having a front surface and a back surface that is opposite to the front surface,
forming a carbon layer on a first region of the front surface while no carbon layer is formed in a second region of the front surface; and
forming a conductive polymer on the carbon layer by immersing the current collector in an electrolytic solution containing a raw material monomer of the conductive polymer and then conducting electrolytic polymerization of the raw material monomer.

2. The method according to claim 1 , wherein:
the second region extends across in a widthwise direction of the current collector and extends in at least one position in a lengthwise direction of the current collector.

3. The method according to claim 1 , wherein:
the current collector includes a base material made of at least one of aluminum or an aluminum alloy, and
the conductive polymer includes at least one of polyaniline or a derivative of polyaniline.

4. The method according to claim 1 , wherein:
the second region extends in a lengthwise direction of the current collector.

5. The method according to claim 4 , wherein:
the current collector includes a base material made of at least one of aluminum or an aluminum alloy, and
the conductive polymer includes at least one of polyaniline or a derivative of polyaniline.

6. The method according to claim 1 , further comprising attaching a lead member to the second region in which no carbon layer is present.

7. The method according to claim 6 , wherein:
the current collector includes a base material made of at least one of aluminum or an aluminum alloy, and
the conductive polymer includes at least one of polyaniline or a derivative of polyaniline.

8. The method according to claim 6 , wherein:
the second region extends across in a widthwise direction of the current collector and extends in at least one position in a lengthwise direction of the current collector.

9. The method according to claim 8 , wherein:
the current collector includes a base material made of at least one of aluminum or an aluminum alloy, and
the conductive polymer includes at least one of polyaniline or a derivative of polyaniline.

10. A method for manufacturing a power storage device, the method comprising:
forming a positive electrode by the method according to claim 1 ; and
stacking or winding the positive electrode, a negative electrode, and a separator, the separator being interposed between the positive electrode and the negative electrode.

11. A method for manufacturing a positive electrode for a power storage device, the method comprising:
preparing a current collector having a sheet-shape, the current collector having a front surface and a back surface that is opposite to the front surface,
forming a carbon layer in a first region of the front surface while no carbon layer is formed in a second region-of the front surface; and
forming a conductive polymer on the carbon layer by immersing the current collector in an electrolytic solution containing a raw material monomer of the conductive polymer and then conducting electrolytic polymerization of the raw material monomer, while no conductive polymer is formed on the second region.

12. The method according to claim 11 , wherein:
the second region extends across in a widthwise direction of the current collector and extends in at least one position in a lengthwise direction of the current collector.

13. The method according to claim 11 , wherein:
the current collector includes a base material made of at least one of aluminum or an aluminum alloy, and
the conductive polymer includes at least one of polyaniline or a derivative of polyaniline.

14. The method according to claim 11 , wherein:
the second region extends in a lengthwise direction of the current collector.

15. The method according to claim 14 , wherein:
the current collector includes a base material made of at least one of aluminum or an aluminum alloy, and
the conductive polymer includes at least one of polyaniline or a derivative of polyaniline.

16. The method according to claim 11 , further comprising attaching a lead member to the second region in which no carbon layer and no conductive polymer are present.

17. The method according to claim 16 , wherein:
the current collector includes a base material made of at least one of aluminum or an aluminum alloy, and
the conductive polymer includes at least one of polyaniline or a derivative of polyaniline.

18. The method according to claim 16 , wherein:
the second region extends across in a widthwise direction of the current collector and extends in at least one position in a lengthwise direction of the current collector.

19. The method according to claim 18 , wherein:
the current collector includes a base material made of at least one of aluminum or an aluminum alloy, and
the conductive polymer includes at least one of polyaniline or a derivative of polyaniline.

20. A method for manufacturing a power storage device, comprising:
forming a positive electrode by the method according to claim 11 ; and
stacking or winding the positive electrode, a negative electrode, and a separator, the separator being interposed between the positive electrode and the negative electrode.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Endou Tougo
• Ito Yasuyuki
• Nomoto Susumu
• Matsumura Nao
• Hayashi Hiroki
• Akutsu Makoto

Classifications

• H01M50/536

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

• H01M50/534

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

• H01M50/533 Primary

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

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M2004/028

  Positive electrodes · CPC title