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Carbon cream, carbon negative electrode of battery, preparation method thereof and super lead-acid battery

A super lead-acid battery, negative electrode technology, applied in battery electrodes, lead-acid battery electrodes, circuits, etc., to achieve the effect of improving cycle life, good electrical conductivity, and inhibiting hydrogen evolution

Active Publication Date: 2012-08-15
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problems to be solved by the present invention include, aiming at the problem of hydrogen evolution at the negative electrode of the super lead-acid battery in the prior art, providing a carbon paste for the carbon negative electrode of the super lead-acid battery that can suppress the hydrogen evolution at the negative electrode

Method used

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  • Carbon cream, carbon negative electrode of battery, preparation method thereof and super lead-acid battery
  • Carbon cream, carbon negative electrode of battery, preparation method thereof and super lead-acid battery
  • Carbon cream, carbon negative electrode of battery, preparation method thereof and super lead-acid battery

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Embodiment 1

[0044] This embodiment provides a carbon paste for a carbon negative electrode of a super lead-acid battery, which is formed by mixing a solid component and a liquid component, and the solid component contains:

[0045]A hydrogen evolution inhibitor with a content of 0.01% to 30%, whose general formula is M x N y o z , where M represents any one of Sr, Ba, Zn, and Cd, and N represents any one of Zr, Sn, and Pb, 0.5≤x≤1, 0.5≤y≤1, 2≤z≤3; among them, The content of hydrogen evolution inhibitor is the mass percentage relative to the total amount of solid components; that is to say, 0.01-30 mass parts of hydrogen evolution inhibitor is contained in 100 mass parts of solid components.

[0046] According to the above general formula, the hydrogen evolution inhibitor can be ZnPbO 3 , CdPbO 3 , BaPbO 3 , ZnSnO 3 , CdSnO 3 , CdZr 0.5 o 2 , SrPb 0.5 o 2 、Ba 0.5 Pb 0.5 o 2 、Cd 0.5 PbO 2.5 and other substances; preferably, N represents Pb, x=1, z=3, that is, the hydrogen ev...

Embodiment 2

[0059] The present embodiment provides a kind of preparation method of carbon paste for super lead-acid battery carbon negative electrode, it comprises the following steps:

[0060] 1) Weigh the specific surface area as 1800m 2 / g of activated carbon 800g, the specific surface area is 800m 2 15g of conductive carbon black per gram, 5g of nylon fibers with a length of 3mm, 100g of lead powder with a degree of oxidation of 75%, BaPbO as a hydrogen evolution inhibitor 3 80g, they were added in the agate mortar, dry mixed and dispersed for 5min to obtain the first mixture;

[0061] 2) Add 920g deionized water to the first mixture, grind for 10min to obtain the second mixture;

[0062] 3) Add 300 mg of sulfuric acid solution with a density of 1.4 g / ml (at 25° C.) to the second mixture, and continue grinding for 15 minutes to form the third mixture;

[0063] 4) 95 g of 10% polyvinylidene fluoride solution (as a binder) was evenly added dropwise into the third mixture, and ground ...

Embodiment 3

[0072] The present embodiment provides a kind of preparation method of carbon paste for super lead-acid battery carbon negative electrode, it comprises the following steps:

[0073] 1) Weigh the specific surface area as 1800m 2 / g of activated carbon 750g, the specific surface area is 800m 2 60g of conductive carbon black per gram, 5g of long 3mm nylon fiber, 125g of lead powder with 80% degree of oxidation, ZnPbO as hydrogen evolution inhibitor 3 60g, they were added in a stirring vessel, dry-mixed and dispersed for 5min to obtain the first mixture;

[0074] 2) Add 1000g of deionized water to the first mixture, stir for 10min to obtain the second mixture;

[0075] 3) Add 1800 mg of sulfuric acid solution with a density of 1.1 g / ml (at 25° C.) to the second mixture, and continue stirring for 15 minutes to form the third mixture;

[0076] 4) 100 g of a 10% polytetrafluoroethylene solution (as a binder) was evenly added dropwise into the third mixture, and stirred for 15 minu...

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Abstract

The invention provides a carbon cream, a carbon negative electrode of a battery, a preparation method of the carbon cream and the carbon negative electrode of the battery, and a super lead-acid battery, which all belong to the technical field of lead-acid batteries and solve the problem of hydrogen evolution of a negative electrode of the traditional super lead-acid battery in the prior art. The carbon cream disclosed by the invention is mixed by solid components and liquid components, wherein the solid components comprise the following components by weight: 0.01%-30% of hydrogen evolution inhibitor of which the general formula is MxNyOz, wherein M represents any one of Sr, Ba, Zn and Cd, N represents any one of Zr, Sn and Pb, x is more than or equal to 0.5 and is less than or equal to 1, y is more than or equal to 0.5 and less than or equal to 1, and z is more than or equal to 2 and is less than or equal to 3. The preparation method of the carbon cream comprises the following steps of successively mixing the raw materials. The negative electrode of the super lead-acid battery is prepared from the above carbon cream. The preparation method of the negative electrode of the super lead-acid battery comprises the following steps of coating and drying the carbon cream. The super lead-acid battery disclosed by the invention comprises the above carbon negative electrode. The carbon cream can be used for the super lead-acid battery of a hybrid electric vehicle.

Description

technical field [0001] The invention belongs to the technical field of lead-acid batteries, and in particular relates to a carbon paste, a battery carbon negative electrode, a preparation method thereof, and a super lead-acid battery. Background technique [0002] In order to ensure high output power and high charging efficiency, lead-acid batteries for hybrid electric vehicles (HEV) require the state of charge to be maintained at 30% to 70%, and in this operating mode to charge and discharge at a high rate, and the discharge rate can reach 15C. The magnification can reach 8C. However, at high rate discharge, PbSO 4 A dense crystal layer will be formed on the surface of the electrode, and it is difficult for the crystal layer to be fully converted into active substances during charging, so a large irreversible PbSO will be formed after multiple charge-discharge cycles. 4 Particles reduce the effective reaction area, increase electrode polarization, and cause side reactions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/14H01M4/16
CPCY02E60/10
Inventor 陈大华熊建民
Owner CHERY AUTOMOBILE CO LTD
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