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Method for manufacturing foam nickel electrode matrix

A technology of nickel foam and foam, which is applied in the field of production of nickel foam electrode substrates, can solve problems such as inability to ensure firm bonding of foam nickel, poor uniformity of foam nickel density, and firm bonding between difficult nickel powder and foam nickel. Achieve the effect of low cost, low equipment investment and high speed

Active Publication Date: 2008-02-13
SHANGHAI BYD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of this method is that the process is complicated, and it is difficult to coat evenly when coating or spraying nickel powder, resulting in poor uniformity of the foamed nickel densification position, and it is also difficult to ensure that the nickel powder and the foamed nickel are firmly bonded, and the cost is high; The nickel alloy wire is embedded in the nickel-plated polyurethane foam skeleton, and the nickel or nickel alloy wire cannot guarantee a firm bond with the foam nickel during sintering, and the cost is high

Method used

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  • Method for manufacturing foam nickel electrode matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take the foamed polyurethane strip after electroplating nickel (commercial product, pore distribution 110PPI, thickness 1.9mm) and cut it to a length of 400000mm and a width of 65mm; The strip is placed in the middle of the length direction of the belt, pressed to a total thickness of 1.3mm by a roller press, and then first treated in an oxidizing atmosphere at 400 ° C for 0.2 hours to make the polyurethane in it After firing and decarburization, the nickel oxidized therein was reduced by reduction at 900° C. for 0.6 hours in a hydrogen reducing atmosphere. Then, 2000 pieces of nickel foam substrates with a length of 200mm and a width of 65mm were made from the cut pieces, and the label is I.

Embodiment 2

[0038] Take the foamed polyurethane strip after electroplating (commercial product, 110PPI pore distribution, thickness 0.9mm) and cut it into a strip with a length of 400000mm and a width of 65mm; take the same material as above and cut a narrow strip with a length of 400000mm, a width of 5mm and a thickness of 0.2mm. The strip is placed at the edge of the belt in the length direction, pressed to a total thickness of 2.0 mm by a roller press, and then first treated in an oxidizing atmosphere at 500 ° C for 0.2 hours to make the polyurethane in it After burning off, the nickel oxidized therein was reduced by reduction at 950° C. for 0.6 hours in a hydrogen reducing atmosphere. Then, 2000 pieces of nickel foam substrates with a length of 200mm and a width of 65mm were made by cutting the pieces, and the number was III. The 2,000 substrates III were made into positive electrode sheets of the battery according to the method of Test Example 1. The number of broken and split pieces...

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Abstract

This invention provides a method for preparing a foam Ni-electrode matrix including preparing a foam polyurethane strip plated with Ni, optimizing the middle or edge positions on the surface of the strip and putting the nickel plated strip of 0.5-10nm wide and 0.05-1.0mm thick of the same material as the variable-density position to be rolled to the thickness needed by the battery pole, generally, 0.5-3mm, then to burn out the foam polyurethane and the rest foam nickel are adhered together to become density foam nickel reinforcement rib at the density position, namely the collecting strip.

Description

【Technical field】 [0001] The invention relates to a manufacturing method of nickel-hydrogen or nickel-cadmium battery electrodes, and more particularly to a manufacturing method of a foamed nickel electrode substrate. 【Background technique】 [0002] Alkaline batteries such as Ni / Cd and Ni / MH are assembled from positive electrode sheets, negative electrode sheets, electrolytes and separators in the battery steel shell. The positive and negative electrode sheets are generally made by coating a mixture of active materials, additives, binders, etc. on a conductive substrate. The conductive substrate is generally made of foamed nickel, perforated nickel-plated steel strip, perforated nickel strip and other materials. Due to the special three-dimensional network structure, large specific surface area, high porosity, excellent permeability and great fillability of nickel foam, it is preferred as a conductive matrix. However, the disadvantage of foamed nickel is that the strength ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/26H01M4/32H01M4/64
CPCY02E60/124Y02E60/10
Inventor 李维陈永阳刘涛檀世同
Owner SHANGHAI BYD