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High-performance battery small-crystal-size 4BS additive preparation method

A technology of additive preparation and crystal size, applied in battery electrodes, lead-acid batteries, circuits, etc., can solve the problems of 4BS crystal size, difficult to control purity, difficult to realize industrial production, complex preparation process, etc., to achieve high product application value, Simple and easy operation, the effect of improving porosity

Active Publication Date: 2019-01-04
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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  • High-performance battery small-crystal-size 4BS additive preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

Embodiment 2

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

Embodiment 3

[0043] Using β-PbO and tribasic lead sulfate as reactants, the amount of reactants is proportioned according to the molar ratio of total lead element to sulfate radical in the two raw materials of 5:1, and the total amount of lead element in the two raw materials The same as in Example 1. That is, the raw materials are 32 g β-PbO and 34.9 g tribasic lead sulfate. 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 size 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 4BS additives with small crystal sizes for high-performance batteries. Background technique [0002] Lead-acid batteries have developed to today, and 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 shedding is one of the main problems that limit the application prospects of lead-acid batteries. Since the 1960s, researchers have 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 because of the coarse 4BS crystal, long formation time, low initial discharge capacity, and low economic benefits, it is shelved. [0003] After entering the 1990s, researchers have intensified their research on methods for contr...

Claims

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Application Information

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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
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