Method of manufacturing an electrode for an energy storage device

Patent metadata

Field	Value
Publication number	US-10121606-B2
Application number	US-201615151088-A
Country	US
Kind code	B2
Filing date	May 10, 2016
Priority date	Jun 25, 2010
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

An electrode for an energy storage device including a Zn layer or Zn alloy layer, a Ni layer, and a Sn layer or Sn alloy layer formed by plating on a connecting terminal part of a positive electrode composed of Al so that the resistance value at the contacting point is reduced and the voltage of the energy storage device can be effectively supplied without any drop. Accordingly, this electrode can be soldered to a Cu negative electrode, which is composed of metal that is different species from Al, through a Sn layer or a Sn alloy layer so that jointing strength of the Al positive electrode and the Cu negative electrode can be enhanced. The contacting area is increased in comparison with the conventional jointing by spot-welding or conventional fastening by a bolt so that the resistance value at the contacting point is reduced.

First claim

The invention claimed is:

1. A method of manufacturing an electrode for an energy storage device, the method comprising:
degreasing a surface of a positive electrode containing Al by using an organic solvent;
thereafter, etching the surface of the positive electrode degreased in the step of degreasing, by using an etchant;
thereafter, forming a Zn plating on the surface of the positive electrode etched in the step of etching, by using a liquid zincate;
thereafter, forming a Ni plating on a surface of the Zn plating formed in the step of forming a Zn plating, by using a Ni plating solution; and
thereafter, forming a Sn plating on a surface of the Ni plating formed in the step of forming a Ni plating, by using a Sn plating solution.

2. The method of manufacturing an electrode for an energy storage device according to claim 1 wherein the step of forming a Zn plating on the surface of the positive electrode by using a liquid zincate is performed at least two times.

3. The method of manufacturing an electrode for an energy storage device according to claim 2 wherein the step of forming a Zn plating on the surface of the positive electrode by using a liquid zincate includes forming a layer of Zn or Zn alloy having a thickness of 0.05 through 0.1 μm.

4. The method of manufacturing an electrode for an energy storage device according to claim 1 wherein the step of forming a Zn plating on the surface of the positive electrode by using a liquid zincate includes forming a layer of Zn or Zn alloy having a thickness of 0.05 through 0.1 μm.

Assignees

• Senju Metal Industry Co

Inventors

• Nakamura Katsuji
• Tsuruta Kaichi
• Ozaki Yuji
• Watarai Shigeaki
• Takagi Hidenori
• Ohori Yutaka

Classifications

• H01M50/534

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

• C25D3/565

  containing more than 50% by weight of zinc · CPC title

• C25D3/12

  of nickel or cobalt · CPC title

• H01M2/202

  Electricity · mapped topic

• H01G11/24

  characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor · CPC title