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Mercury-free button cell negative electrode cover material, and preparation method and application thereof

A button battery and negative electrode cover technology, which is applied in the field of electrochemical materials, can solve the problem of unsatisfactory anticorrosion, sealing, plasticity and strength properties of the negative electrode cover of alkaline mercury-free button batteries, and poor corrosion resistance, plasticity and strength properties of the negative electrode cover. Ideal and other issues, to achieve excellent one-piece stamping characteristics, small internal stress, and enhanced bonding strength

Active Publication Date: 2019-10-22
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a mercury-free button battery negative electrode cover material and its preparation method, to solve the problems of unsatisfactory corrosion resistance, plasticity and strength performance of the negative electrode cover of the existing alkaline mercury-free button battery technical problem
[0007] Another object of the present invention is to provide a mercury-free button battery negative electrode cover and a mercury-free button battery containing the mercury-free button battery negative electrode cover, to solve the problem of corrosion resistance, sealing performance, and corrosion resistance of the existing alkaline mercury-free button battery negative electrode cover. Technical problems with unsatisfactory plasticity and strength properties

Method used

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  • Mercury-free button cell negative electrode cover material, and preparation method and application thereof
  • Mercury-free button cell negative electrode cover material, and preparation method and application thereof
  • Mercury-free button cell negative electrode cover material, and preparation method and application thereof

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preparation example Construction

[0034] Correspondingly, the embodiment of the present invention also provides a preparation method of the above-mentioned negative electrode cover material of the mercury-free button battery. The process flow of the preparation method of the negative electrode cover material of the mercury-free button cell is as follows: figure 2 shown, combined with figure 1 , which includes the following steps:

[0035] S01: forming a nickel layer 20 on at least one surface of the metal base 10;

[0036] S02: forming a copper layer 30 on the outer surface of the nickel layer 20;

[0037] S03: electroplating an indium layer on the outer surface of the copper layer 30;

[0038] S04: Electroplating an indium-tin alloy layer on the outer surface of the indium layer;

[0039] S05: After the metal substrate 10 electroplated with the indium-tin alloy layer is rolled, thermal diffusion treatment is performed.

[0040] Wherein, the formation of the nickel layer 20 in the step S01 and the format...

Embodiment 1

[0060] This embodiment provides a mercury-free button cell negative electrode cover material and a preparation method thereof. The negative cover material of the mercury-free button cell is a multi-layer composite structure, and its structure is as follows: figure 1 As shown, the steel strip 10 is included, the nickel layers 20 on the opposite surfaces of the steel strip 10 are stacked, along the direction extending from the surface of the steel strip 10 to the nickel layer 20, on the surface of one of the nickel layers 20 The copper layer 30 , the indium diffusion layer 40 and the indium tin alloy diffusion layer 50 are sequentially stacked and combined. Wherein, the nickel layer 20 has an average thickness of 3 μm, the copper layer 30 has an average thickness of 3 μm, the indium diffusion layer 40 has an average thickness of 5 μm, and the indium-tin alloy diffusion layer 50 has an average thickness of 5 μm.

[0061] The preparation method of the negative electrode cover mat...

Embodiment 2

[0071] This embodiment provides a mercury-free button cell negative electrode cover material and a preparation method thereof. The negative cover material of the mercury-free button cell is a multi-layer composite structure, and its structure is as follows: figure 1 As shown, the steel strip 10 is included, the nickel layers 20 on the opposite surfaces of the steel strip 10 are stacked, along the direction extending from the surface of the steel strip 10 to the nickel layer 20, on the surface of one of the nickel layers 20 The copper layer 30 , the indium diffusion layer 40 and the indium tin alloy diffusion layer 50 are sequentially stacked and combined. Wherein, the nickel layer 20 has an average thickness of 1.5 μm, the copper layer 30 has an average thickness of 3 μm, the indium diffusion layer 40 has an average thickness of 1 μm, and the indium-tin alloy diffusion layer 50 has an average thickness of 10 μm.

[0072] The preparation method of the negative electrode cover ...

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Abstract

The invention discloses a mercury-free button cell negative electrode cover material, and a preparation method and application thereof. The mercury-free button cell negative electrode cover material comprises a metal substrate body, a nickel layer, a copper layer, an indium diffusion layer and an indium-tin alloy diffusion layer. The nickel layer is laminated and combined on at least one surface of the metal substrate body. The copper layer, the indium diffusion layer and the indium-tin alloy diffusion layer are sequentially laminated and combined in the extending direction from the surface ofthe metal substrate body to the nickel layer, and the copper layer and the nickel layer are laminated and combined. The mercury-free button cell negative electrode cover material is small in internalstress, excellent in plasticity and strength, and excellent in punching molding and has excellent corrosion resistance, especially the alkaline corrosion resistance. In addition, the conditions of the preparation method are easy to control, the prepared mercury-free button cell negative electrode cover material is stable in performance and high in efficiency, and the production cost is effectively reduced. The mercury-free button cell negative electrode cover material is used for preparing a mercury-free button cell negative electrode cover and a mercury-free button cell.

Description

technical field [0001] The invention belongs to the field of electrochemical materials, and in particular relates to a mercury-free button battery negative electrode cover material and a preparation method and application thereof. Background technique [0002] Batteries are popular because of their portability and practicability. Waste batteries contain a large amount of heavy metals and electrolyte solutions such as waste acids and alkalis. If discarded at will, corrupt batteries will destroy our water sources, erode the crops and land we depend on for survival, and our living environment is facing a huge threat. [0003] Among them, the alkaline manganese button battery occupies the main market of button batteries due to its low price, large output and wide application. In ordinary alkaline manganese batteries, the self-corrosion of zinc releases hydrogen gas and the self-corrosion of zinc is inevitable, which leads to the accumulation of a large amount of gas in the batt...

Claims

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Application Information

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IPC IPC(8): H01M2/04H01M2/08
CPCH01M50/155H01M50/183Y02E60/10
Inventor 符冬菊叶利强陈思颖田勇陈金岩陈建军
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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