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Tin and Tin-Zinc plated substrates to improve Ni-Zn cell performance

A technology for nickel-zinc batteries and substrates, applied in nickel batteries, battery electrodes, alkaline batteries, etc., can solve problems such as battery rupture and damage to conductive channels

Active Publication Date: 2009-05-27
ZINCFIVE POWER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While some of the evolved hydrogen can recombine with oxygen to form water, the remaining hydrogen can build up in the cell and cause the cell to rupture or damage the conductive pathways

Method used

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  • Tin and Tin-Zinc plated substrates to improve Ni-Zn cell performance
  • Tin and Tin-Zinc plated substrates to improve Ni-Zn cell performance
  • Tin and Tin-Zinc plated substrates to improve Ni-Zn cell performance

Examples

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Embodiment Construction

[0021] introduction

[0022] In the following detailed description of the invention, numerous specific embodiments are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details, or by using alternative parts or methods, while utilizing the spirit and scope of the invention. In other instances, well-known methods, procedures, and components have not been described in detail so as not to unnecessarily obscure aspects of the invention.

[0023] The invention relates to a method for manufacturing a nickel-zinc battery, especially a method for manufacturing a negative electrode. The negative electrode may have a metallic copper or brass based substrate current collector. During the manufacturing process, the substrate is electrolytically cleaned and plated with tin or both tin and zinc. The zinc oxide-based electrochemically active mater...

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PUM

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Abstract

An improved Ni-Zn cell with a negative electrode substrate plated with tin or tin and zinc during manufacturing has a reduced gassing rate. The copper or brass substrate is electrolytic cleaned, activated, electroplated with a matte surface to a defined thickness range, pasted with zinc oxide electrochemically active material, and baked. The defined plating thickness range of 40-80 muIn maximizes formation of an intermetallic compound Cu3Sn that helps to suppress the copper diffusion from under plating layer to the surface and eliminates formation of an intermetallic compound Cu6Sn5 during baking to provide adequate corrosion resistance during battery operation.

Description

technical field [0001] The present invention relates to rechargeable batteries, and more particularly to nickel zinc rechargeable batteries. More specifically, the present invention relates to compositions and current collector structures of negative-working pastes for use in zinc electrodes. Background technique [0002] Cylindrical batteries use alternating layers of electrodes and electrolytes. Each electrode may include a current collector substrate and one or more electrochemically active layers. Current collector design considerations are as follows: (a) high electrical conductivity; (b) resistance to corrosion by the electrolyte used; (c) resistance to electrochemical reactions so as not to be consumed too quickly; (d) to make it resistant to manufacturing operations (e.g. (e) low overall cost, including material cost and fabrication; and (f) a surface structure that provides excellent physical contact or "connectivity" with the electrochemically active layer ( For...

Claims

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Application Information

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IPC IPC(8): H01M4/26H01M4/28H01M4/24H01M4/66H01M10/24
CPCC25D3/30C25D5/50H01M4/667C25D3/60C25D7/0614H01M4/26H01M4/32H01M4/661Y02E60/124C25D5/48H01M4/244C25D5/34H01M10/30H01M10/24Y02E60/10H01M4/66
Inventor F·冯J·菲利普斯S·莫汗塔J·巴顿Z·M·蒙塔瑟
Owner ZINCFIVE POWER INC
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