Porous copper strip for battery plate and production method thereof

A battery plate and porous copper technology, which is applied in the direction of electrode manufacturing, electrode carrier/current collector, etc., can solve the problems of uneven thickness distribution of active materials, difficult adhesion of active materials, and impact on battery quality, so as to facilitate adhesion, Increased effective specific surface area and good matching effect

Active Publication Date: 2013-01-02
CHANGDE LYRUN MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the ordinary porous copper strip used in the negative electrode matrix of nickel-zinc, zinc-silver and other power batteries has a planar surface structure. When the battery manufacturer uses this porous copper strip for slurry production, the active material is not easy to adhere to the surface of the electrode, sometimes causing One-time pulping cannot achieve the purpose, and multiple pulping must be carried out
Even if the slurry is pulled successfully once, the thickness distribution of the active material on the surface is uneven, which affects the quality of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Porous copper strips are used for battery pole plates in this embodiment. There is a pre-plated copper layer between the surface of the copper strip and the transition metal tin layer, and the thickness of the coating is 3 μm; the thickness of the tin-plated transition layer is 5 μm; The solid particles are evenly distributed in the coating, with 0.6-0.7 μm long embedded in the coating, and 0.3-0.4 μm long protruding from the coating, forming a three-dimensional structure.

[0015] Preparation: The porous copper strip that has undergone perforation, pretreatment, etc. 2+ Carry out electroplating in conventional copper sulfate plating solution system for 1.5min, the pH of the plating solution is 3.8, and the temperature is room temperature to obtain a pre-plated copper layer with a thickness of 3 μm; Sn 2+ Electroplating was carried out in a weakly acidic tin plating system for 3 minutes, the pH of the plating solution was 6.5, the temperature of the plating solution wa...

Embodiment 2

[0018] Porous copper strips are used for battery pole plates in this embodiment, and the thickness of the tin-plated transition layer on the surface of the copper strips is 3 μm; the thickness of the zinc particle layer is 3 μm, and the diameter of the zinc particles is 3 μm. In the coating, 1.0-1.5 μm long protrudes from the coating.

[0019] Preparation: Put the perforated and pretreated porous copper strip into 1.0mol / L Sn 2+ Perform electroplating in a weakly acidic tin plating system for 2 minutes, the pH of the plating solution is 4.5, and the temperature of the plating solution is room temperature to obtain a transitional tin plating layer with a thickness of 3 μm; Put the tin-plated copper strip obtained above transition layer into the composite electroplating solution, the composition and process conditions of the composite plating solution are: stannous sulfate 30g / L, gelatin 5g / L, potassium citrate 80g / L, sodium phenolsulfonate 10g / L zinc powder with a diameter of ...

Embodiment 3

[0022] Porous copper strips are used for battery pole plates in this embodiment. There is a pre-plated iron layer between the surface of the copper strip and the transition metal tin layer, and the thickness of the coating is 0.5 μm; the thickness of the tin-plated transition layer is 1 μm; The dicobalt particles have a diameter of 5 μm, and the dicobalt trioxide solid particles are evenly distributed in the coating, with a length of 3.0-3.5 μm embedded in the coating, and a length of 1.5-2.0 μm protruding from the coating.

[0023] Preparation: the perforated, pretreated porous copper strip containing 2.0mol / L Fe 2+ Perform electroplating in the conventional iron plating system for 2 minutes to obtain a pre-plated iron layer with a coating thickness of 0.5 μm; thermally spray tin on the porous copper strip of the above-mentioned obtained pre-nickel-plated layer to obtain a transition tin coating, and the thickness of the transition layer is 1 μm; The above-mentioned tin-plate...

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Abstract

The invention relates to a porous copper strip used for a battery plate and a preparation method thereof. The surface of the porous copper strip is coated by a metal tin transition layer and a particulate layer; the porous copper strip has a three-dimensional structure; and a particulate layer is coated on the surface of the copper strip in the method of adding particles into the tin plating solution. Owning to the three-dimensional structure, the porous copper strip increases the effective surface area of the tin-plated copper foil, thereby effectively increasing the adhesive area of the carrier material to the active substances of the battery and enhancing the binding force thereof. Moreover, the composite plating method is adopted instead of the mechanical method; therefore, no specialdie is required. Simultaneously, solid particles are added into the tin plating solution; the process and parameters can be easily controlled; and the preparation method has good capability of matching with the plating process and equipment widely used in the existing industry; and the transformation cost is low.

Description

technical field [0001] The invention relates to a battery pole plate material and a preparation method thereof, in particular to a porous copper strip material for a battery pole plate and a preparation method thereof. Background technique [0002] At present, the ordinary porous copper strip used in the negative electrode matrix of nickel-zinc, zinc-silver and other power batteries has a planar surface structure. When the battery manufacturer uses this porous copper strip for slurry production, the active material is not easy to adhere to the surface of the electrode, sometimes causing One-time pulping cannot achieve the purpose, and multiple pulping must be carried out. Even if the slurry is pulled successfully once, the thickness distribution of the active material on the surface is uneven, which affects the quality of the battery. Contents of the invention [0003] The invention aims to provide a porous copper strip for battery pole plates that can effectively improve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/64H01M4/04
CPCY02E60/12Y02E60/10
Inventor 谢红雨龙文贵夏健康陈红辉彭鹏辉肖腾彬朱济群段志明唐振武蒋素斌李星
Owner CHANGDE LYRUN MATERIAL
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