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A preparation method of high-performance battery small crystal size 4bs additive

A technology of additive preparation and crystal size, which is applied in battery electrodes, lead-acid batteries, circuits, etc., can solve the problems of 4BS crystal size, difficulty in controlling purity, difficulty in industrialized production, and complicated preparation process, and achieve high product application value, Simple and easy to operate, the effect of improving porosity

Active Publication Date: 2020-09-25
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the above method is complicated, the production cost is high, and the operation is difficult, and the prepared 4BS is difficult to control in terms of crystal size and purity, and it is difficult to realize industrial production.

Method used

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  • A preparation method of high-performance battery small crystal size 4bs additive
  • A preparation method of high-performance battery small crystal size 4bs additive
  • A preparation method of high-performance battery small crystal size 4bs additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] β-PbO and sulfuric acid aqueous solution are used as reactants, and the amount of reactants is proportioned according to the molar ratio of the total lead element and sulfate radical in the two raw materials being 5:1.

[0037]Step 1: Add 40g of β-PbO to 100mL of water, and then add sulfuric acid aqueous solution in the first and second stages. The first stage is to add 11.48 mL of sulfuric acid aqueous solution with a concentration of 2.5 mol / L within 6 minutes, under the conditions of ultrasonic power of 800 W and ultrasonic frequency of 40 kHz, the temperature is controlled at 60-80 ° C, and ultrasonic is 90 min; The second stage is to add 2.87ml, 2.5mol / L sulfuric acid aqueous solution and 0.05% fumed silica in the total mass of the reaction system within 12min, and ultrasonicate for 30min under the conditions of ultrasonic power 400W and ultrasonic frequency 60kHz. , the temperature is controlled at 20-40°C; a suspension is obtained;

[0038] Step 2: Centrifuge th...

Embodiment 2

[0041] β-PbO and lead sulfate are used as reactants, and the amount of reactants is proportioned according to the molar ratio of the total lead element in the two raw materials to the sulfate radical is 5:1, and the amount of the total lead element in the two raw materials is the same as in the example 1. That is, the raw materials are 32g β-PbO and 10.88g lead sulfate, and the other steps and processes are the same as in Example 1. The solid powder is tested by XRD, and the 4BS content is 98.0%, and the SEM test shows that the crystal length is less than 5 μm.

Embodiment 3

[0043] β-PbO and tribasic lead sulfate are used as reactants, and the amount of reactants is proportioned according to the molar ratio of the total lead element in the two raw materials to the sulfate radical at 5:1. The amount of the total lead element in the two raw materials With embodiment 1. That is, the raw materials are 32gβ-PbO and 34.9g tribasic lead sulfate, and the remaining steps and processes are the same as in Example 1. The 4BS content in the solid powder is 99.0%, and the SEM test shows that the crystal length is less than 5 μm.

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Abstract

The invention discloses a high-performance battery small-crystal-size 4BS additive preparation method which includes the steps: adding lead-bearing reaction raw materials into water, adding raw materials containing sulfate radicals at a first stage and a second stage and performing reaction under ultrasonic conditions to obtain turbid liquid; centrifugally separating the turbid liquid to obtain solid precipitates; calcining the solid precipitates, cooling products to room temperature and grinding and sieving the products to obtain solid powder; dispersing the solid powder into mixed solvents of ethyl alcohol and the water, performing ultrasonic treatment for a period of time, performing suction filtration on the turbid liquid, drying filter cakes and then grinding and sieving the filter cakes to obtain small-crystal-size 4BS. The method is simple in operation and low in cost, the prepared 4BS is high in purity and small in crystal-size, can serve as a lead-acid battery electrode plateadditive and has high product application values, and the service life of an electrode plate can be prolonged.

Description

technical field [0001] The invention relates to the field of lead-acid batteries, in particular to a method for preparing a high-performance battery small crystal size 4BS additive. Background technique [0002] With the development of lead-acid batteries today, various manufacturing technologies are more mature than other types of batteries, but there are still many areas to be improved, and the problem of positive active material falling off is one of the main problems that limit the application prospects of lead-acid batteries. Since the 1960s, researchers have studied and proved that the increase of tetrabasic lead sulfate (4PbO·PbSO 4 , hereinafter referred to as 4BS) content is an effective way to solve the problem of positive active material shedding, but it has been shelved because of the thick 4BS crystals, long formation time, low initial discharge capacity, and low economic benefits. [0003] After entering the 1990s, researchers have strengthened the research on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G21/20C01G21/06H01M4/62H01M10/06
CPCC01G21/06C01G21/20C01P2002/72C01P2004/03C01P2006/80H01M4/628H01M10/06Y02E60/10
Inventor 高云芳吴宝亮徐新
Owner ZHEJIANG UNIV OF TECH