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Lead-carbon battery negative plate and preparation method therefor

A technology of lead-carbon battery and negative plate, applied in the direction of lead-acid battery electrodes, battery electrodes, circuits, etc., to achieve good bonding effect, avoid softening and falling off, and improve cycle life

Inactive Publication Date: 2016-08-10
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0005] The purpose of the present invention is to provide a lead-carbon composite gradient negative plate, which can improve the cycle life of the lead-carbon battery, in view of the problem that the method of uniformly doping carbon materials in the current lead-carbon battery preparation process restricts the further improvement of the battery cycle life

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  • Lead-carbon battery negative plate and preparation method therefor

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Embodiment Construction

[0025] The following will be further described in detail in conjunction with specific embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] The additives used in the present invention include the following components in terms of mass fractions: 1-2 parts of barium sulfate, 0.5 parts of sodium lignosulfonate, 0.4-0.6 parts of humic acid and 0.1-0.15 parts of short fibers.

[0027] Utilize above-mentioned negative electrode additive to prepare negative electrode plate, preparation process is as follows:

[0028] (1) In the paste mixing machine, add lead powder and additives and stir for 5 minutes;

[0029] (2...

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Abstract

The invention provides a lead-carbon battery negative plate and a preparation method therefor. The negative plate comprises a plate grid and a negative electrode material for coating the plate grid, wherein the negative electrode material comprises an additive and more than one composite lead-carbon paste layer; and the carbon contents of the composite lead-carbon paste layers are gradually increased from the plate grid to the outer surface of the negative plate. According to the lead-carbon composite gradient negative plate obtained by the technical scheme of the invention, the corrosion layer formed between the plate grid and the lead paste is high in adhesion effect; a transmission channel with an excellent performance is established between the interior of the electrode and the external electrolyte, so that the migration rate of reaction ions is improved, and an effect of restraining negative electrode sulfation is achieved; the capability of charge acceptance of the prepared lead-carbon battery is improved by 1-2 times; the softening and falling off the negative electrode material in the cycle process are avoided; and the cycle life of the battery is prolonged.

Description

technical field [0001] The invention relates to a negative plate, in particular to a lead-carbon battery negative plate and a preparation method thereof. Background technique [0002] Lead-acid battery negative charge and discharge reaction formula: Pb+HSO 4 － =PbSO 4 +2e － +H + . HSO 4 － The diffusion rate is much smaller than the reaction consumes HSO 4 － During the discharge process, lead sulfate is preferentially deposited on the surface of the negative plate, forming coarse-grained PbSO 4 . After many cycles, PbSO 4 The grains grow further in the negative plate, and finally the negative plate is covered with a layer of lead sulfate layer, which hinders HSO 4 ˉDiffusion inside the negative plate, eventually leading to battery failure. Under the working condition of HRPSoC, the deposition rate of lead sulfate gradually decreases from the outside to the inside of the negative plate during the discharge process. Therefore, the growth rate of lead sulfate grains...

Claims

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Application Information

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IPC IPC(8): H01M4/14H01M4/583H01M4/16
CPCH01M4/14H01M4/16H01M4/583Y02E60/10
Inventor 胡晨杨凯高飞刘皓金翼刘道坦惠东来小康
Owner CHINA ELECTRIC POWER RES INST
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