Preparation method for zinc anode, zinc anode and battery

A zinc anode and battery technology, applied in negative electrodes, lead-acid batteries, alkaline batteries, etc., can solve the problems of potential safety hazards, battery bulging, battery performance deterioration, etc. The effect of avoiding battery bulging and inhibiting battery performance degradation

Active Publication Date: 2015-04-15
POSITEC POWER TOOLS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, at present, after the battery is used for a period of time, a large amount of gas will be generated inside the battery, which will easily cause the battery to bulge, resulting in a safety hazard in the use of the battery; at the same time, due to the generation of gas, the performance of the battery will also deteriorate

Method used

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  • Preparation method for zinc anode, zinc anode and battery
  • Preparation method for zinc anode, zinc anode and battery
  • Preparation method for zinc anode, zinc anode and battery

Examples

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preparation example Construction

[0029] A method for preparing a zinc negative electrode, the preparation method comprising the following steps of pretreating metal zinc, and then making the pretreated metal zinc into a zinc negative electrode; the pretreatment includes contacting the metal zinc with a treatment solution to make the metal zinc Surface modification: the treatment liquid is selected from one of hydrogen peroxide solution, permanganate solution, ferric ion solution and tetravalent cerium ion solution.

[0030] Wherein, the metallic zinc may be zinc powder or zinc flakes.

[0031] Before the metal zinc is treated with the treatment solution, the metal zinc needs to be pre-cleaned to remove the grease on the surface of the metal zinc.

[0032] Specifically, wash the metal zinc with a large amount of water, or soak it in a degreasing agent, and then rinse it with a large amount of water.

[0033] Use the treatment solution to pretreat the metal zinc to modify the surface of the metal zinc and chan...

Embodiment approach

[0042] In another preferred implementation method, the contacting is to expose one side of the zinc sheet to the treatment liquid.

[0043] Among them, the method of protective film can be used for one side of the zinc sheet to contact the treatment solution, specifically: attach a protective film to one side of the zinc sheet, then fully immerse the zinc sheet in the treatment solution, and place the side with the protective film on the surface of the protective film. Do not contact with the treatment solution under action; after soaking, remove the protective film.

[0044] The single-sided contact of the zinc sheet can also be a direct single-sided contact, specifically: the zinc sheet faces upwards and downwards, and the downward side contacts the liquid surface of the treatment liquid, while the upward side is located on the surface of the treatment liquid. Above the liquid level, not in contact with the treatment liquid.

[0045] In the present invention, it is preferre...

Embodiment approach

[0082]In a preferred embodiment, the battery containing the positive electrode collector can also be charged and discharged to achieve the purpose of passivating the positive electrode collector. The voltage is charged to 2.1-2.4V when charging, and the voltage is released to 1.35-2.4V when discharging. 1.45V, charge and discharge times not less than 1.

[0083] In a specific embodiment, when preparing the positive electrode, in addition to the positive electrode active material, depending on the actual situation, it may be necessary to add a positive electrode conductive agent and a positive electrode binder to improve the performance of the positive electrode.

[0084] The positive electrode conductive agent is selected from one or more of conductive polymers, activated carbon, graphene, carbon black, graphite, carbon fibers, metal fibers, metal powders, and metal flakes.

[0085] The positive electrode binder can be selected from polyethylene oxide, polypropylene oxide, pol...

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Abstract

The invention discloses a preparation method for a zinc anode. The preparation method comprises: pretreating a metal zinc, and preparing the anode from the pretreated metal zinc, wherein pretreatment comprises contacting the metal zinc with a processing liquid for modifying the metal zinc surface, and the processing liquid is one of a hydrogen peroxide solution, a permanganate solution, a trivalent ferric ion solution and a tetravalent cerium ion solution. The invention also provides the zinc anode obtained by employing the above preparation method and a battery containing the above zinc anode. By using the processing liquid for pretreating the metal zinc, the side reaction of the zinc anode is reduced, generation of a zinc anode gas is effectively inhibited, and thus cell inflation is avoided, the safety performance of the cell is improved, and cell performance attenuation is effectively inhibited.

Description

technical field [0001] The invention relates to a preparation method of a zinc negative electrode. [0002] The invention relates to a zinc negative electrode obtained by the above method. [0003] The invention relates to a battery containing the above-mentioned zinc negative electrode. Background technique [0004] Lead-acid batteries, which have been around for more than a hundred years, have mature battery technology and occupy an absolute market share in energy storage fields such as car starter batteries, electric bicycles, and UPS. Although the lead-acid battery has a low cycle life and a relatively low energy density, it has the advantages of very low price and high cost performance. Therefore, in recent years, nickel-metal hydride batteries, lithium-ion batteries, sodium-sulfur batteries, etc., cannot replace lead-acid batteries in the field of energy storage. [0005] A battery based on internal ion exchange has emerged. The working principle of the battery is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/26H01M10/28
CPCH01M4/14H01M4/16H01M10/12H01M2004/027Y02E60/10Y02P70/50
Inventor 刘洋陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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