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Lead paste additive for lead-carbon battery and lead-carbon battery

A lead-carbon battery and additive technology, applied in battery electrodes, lead-acid batteries, secondary batteries, etc., can solve the problems of weakened bonding strength between active materials, large structural differences, large volume changes, etc., to improve charge acceptance , The effect of reducing the softening rate and improving the strength of the plate

Active Publication Date: 2022-02-25
广东奥克莱集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The active material of the positive electrode is lead dioxide. During the use of the battery (charge and discharge), lead dioxide and lead sulfate are transformed into each other. The structure of the two is very different, resulting in a large volume change during the transformation process. In addition, The characteristics of lead dioxide itself-the binding force between them is poor. With the increase of the number of use cycles, the binding strength between the active materials gradually weakens, and then softens and fails.

Method used

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  • Lead paste additive for lead-carbon battery and lead-carbon battery
  • Lead paste additive for lead-carbon battery and lead-carbon battery

Examples

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Effect test

Embodiment 1

[0029] A lead paste additive for a lead-carbon battery, comprising a positive lead paste additive and a negative lead paste additive; the positive lead paste additive comprises, in parts by weight: 10 parts of graphene, 25 parts of modified diatomite, 65 parts of conductive glue.

[0030] Adopting the above-mentioned positive electrode paste additive can effectively improve the cycle life and reduce the amount of gas evolution. The above-mentioned positive electrode paste additive can be strongly adsorbed on the active material of the positive plate, so that a conductive network is formed between the fine active materials, not only Greatly enhance the conductivity between the active materials, and at the same time enhance the connection strength between the active materials, so that the softening rate of the active materials of the positive plate is greatly reduced, effectively improve the strength of the plate, and improve the charge acceptance of the battery And reduce the p...

Embodiment 2

[0042] A lead paste additive for lead-carbon batteries, including a positive lead paste additive and a negative lead paste additive;

[0043] The positive electrode paste additive includes, in parts by weight: 6 parts of graphene, 30 parts of modified diatomaceous earth, and 64 parts of conductive glue.

[0044] The conductive adhesive is prepared from 30 parts by weight of N-methylpyrrolidone, 4 parts by weight of polyvinylidene fluoride, and 1 part by weight of conductive carbon black.

[0045] The preparation method of described modified diatomite is:

[0046] S1. Add 6 parts by weight of diatomite and 0.5 parts by weight of humic acid to 30 parts by weight of citric acid aqueous solution with a mass fraction of 10%, stir at 200 rpm for 20 minutes, filter, and dry to obtain pretreated diatomite;

[0047] S2. Add 6 parts by weight of triethylamine and 6 parts by weight of bromoalkyldiphenylphosphine oxide to 30 parts by weight of tetrahydrofuran, stir at 80°C at 200rpm for ...

Embodiment 3

[0051] A lead paste additive for lead-carbon batteries, including a positive lead paste additive and a negative lead paste additive;

[0052] The positive electrode paste additive includes, by weight, 15 parts of graphene, 15 parts of modified diatomite, and 70 parts of conductive glue.

[0053] The conductive adhesive is prepared from 50 parts by weight of N-methylpyrrolidone, 1 part by weight of polyvinylidene fluoride, and 5 parts by weight of conductive carbon black.

[0054] The preparation method of described modified diatomite is:

[0055] S1. Add 12 parts by weight of diatomite and 2 parts by weight of humic acid to 50 parts by weight of an 8% citric acid aqueous solution, stir at 400 rpm for 18 minutes, filter, and dry to obtain pretreated diatomite;

[0056] S2. Add 4 parts by weight of triethylamine and 4 parts by weight of bromoalkyldiphenylphosphine oxide to 50 parts by weight of tetrahydrofuran, stir at 80°C at 600rpm for 2h, and at 75°C under a pressure of 0.1P...

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Abstract

The invention belongs to the technical field of lead-acid storage batteries, and particularly discloses a lead paste additive for a lead-carbon battery and the lead-carbon battery. The lead paste additive for the lead-carbon battery comprises a positive electrode lead paste additive and a negative electrode lead paste additive; the positive electrode lead paste additive comprises graphene, modified diatomite and a conductive adhesive. By adopting the positive electrode lead paste additive, the cycle life can be effectively prolonged, the gas precipitation amount can be effectively reduced, the positive electrode lead paste additive can be strongly adsorbed on active substances of a positive plate, so that a conductive network is formed among the fine active substances, the conductive performance among the active substances is greatly enhanced, and meanwhile, the connection strength between the active substances is enhanced, so that the softening rate of the active substances of the positive plate is greatly reduced, the strength of the positive plate is effectively improved, the charging acceptance of the battery is improved, the problem of water loss is reduced, the cycle life is prolonged, and the gas precipitation amount is reduced.

Description

technical field [0001] The invention relates to the technical field of lead-carbon batteries, in particular to a lead paste additive for lead-carbon batteries and a lead-carbon battery. Background technique [0002] In the past ten years, lead-carbon batteries have been developed as a capacitive lead-acid battery in China. It is a technology evolved from traditional lead-acid batteries. Unshaped carbon materials (such as activated carbon, activated carbon fiber, carbon aerogel or carbon nanotubes, etc.), which exert the high conductivity of carbon materials with high specific surface area and high dispersion of lead-based active materials, prevent the negative electrode from sulfate It improves the utilization rate of positive and negative active materials; forms many micro-capacitors on the positive and negative electrodes, and utilizes the advantages of high-current charging of capacitors and the specific energy of lead-acid batteries. The combination of the two achieves t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/57H01M10/06H01M10/42
CPCH01M4/57H01M4/625H01M10/06H01M10/4235Y02E60/10
Inventor 梅彦双邵双喜
Owner 广东奥克莱集团有限公司
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