Layered silicate-containing colloidal electrolyte for storage batteries and preparation method thereof

A colloidal electrolyte and layered silicate technology, applied in the field of electrolytes, can solve problems such as low glue filling efficiency, poor battery performance, and difficult glue filling, and achieve the effects of increasing glue filling speed, improving fluency, and improving wettability

Inactive Publication Date: 2011-05-04
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of difficult glue pouring, low glue pouring efficiency, poor battery performance and short service life caused by poor glue pouring fluidity of the existing battery colloidal electrolyte, and the battery gel electrolyte of the present invention is provided for this purpose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Mix 2.0g with a specific surface area of ​​500m under constant stirring 2 / g gas phase nano-SiO 2 Gradually added to 92.95g of dilute sulfuric acid solution with a concentration of 35%, heated up to 50°C and stirred vigorously for 2 hours to obtain dispersion A; under constant stirring, 0.05g of montmorillonite with a size of 0.1 micron was added to dispersion A , continue vigorously stirring at 50°C for 12 hours, lower to room temperature, and obtain dispersion B; under stirring conditions, dissolve 1 g of polyvinyl alcohol 1799, 0.5 g of sodium sulfate, and 3.5 g of phosphoric acid into dispersion B, and continue stirring for 2 hours, a colloidal electrolyte with good thixotropic fluidity and gel stability was obtained. The viscosity of the control colloid without montmorillonite is 1073mPa.s, and the viscosity of the colloid after adding montmorillonite is 219mPa.s.

Embodiment 2

[0025] Mix 10g with a specific surface area of ​​200mm under constant stirring 2 / g gas phase nano-SiO 2 Gradually added to 78.37g of dilute sulfuric acid solution with a concentration of 40%, heated to 50°C and stirred vigorously for 4 hours to obtain dispersion A; under constant stirring, 0.5g of montmorillonite with a size of 2 microns was added to dispersion A , continue to stir vigorously at 50°C for 6 hours, lower to room temperature, and obtain dispersion B; under stirring conditions, dissolve 2.5g of tartaric acid, 3.0g of sodium sulfate, 0.13g of cobalt sulfate, and 5.5g of phosphoric acid into dispersion B, Stirring was continued for 2 hours to obtain a colloidal electrolyte with good thixotropic fluidity and gel stability. The viscosity of the control colloid without montmorillonite is 2465mPa.s, and the viscosity of the colloid after adding montmorillonite is 438mPa.s.

Embodiment 3

[0027] Under constant stirring, 5.0g specific surface area is 300m 2 / g gas phase SiO 2 Gradually added to the 82.6g dilute sulfuric acid solution with a concentration of 45%, the temperature was raised to 55° C. and stirred vigorously for 8 hours to obtain a dispersion A; under constant stirring, 0.4 g of kaolin with a size of 0.5 microns was added to the dispersion A, in Continue to vigorously stir at 55°C for 8 hours, cool down to room temperature, and obtain dispersion B; under stirring conditions, dissolve 5.0 g of glucose, 2.5 g of sodium sulfate, and 4.5 g of phosphoric acid into dispersion B, and continue stirring for 3 hours to obtain Colloidal electrolyte with good thixotropic fluidity and gel stability. The viscosity of the control colloid without adding kaolin is 1574mPa.s, and the viscosity of the colloid after adding kaolin is 392mPa.s.

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Abstract

The invention relates to a layered silicate-containing colloidal electrolyte for storage batteries, which mainly comprises a silicon-containing gel, a thixotropic agent, a complex additive and electrolyte, wherein the thixotropic agent is layered silicate with the width/thickness ratio of 100-2,000. The colloidal electrolyte comprises the following components in percentage by weight: 2.0 to 10.0 percent of gelatinizing agent, 0.05 to 0.5 percent of thixotropic agent, 5.0 to 13.0 percent of complex additive and the balance of dilute solution of sulfuric acid. The colloidal electrolyte has goodthixotropic liquidity and gel stability and low colloid kinetic viscosity; and the filling efficiency of the colloidal electrolyte and the infiltration of the colloidal electrolyte on the baffle plate and polar plates are greatly improved. The electrolyte can be used for assembling storage batteries with different purposes, such as starting batteries, stationary batteries, traction batteries and the like.

Description

technical field [0001] The invention relates to an electrolyte used in storage batteries, in particular to a colloidal electrolyte. Background technique [0002] Gel battery uses colloid as electrolyte, which is a special kind of battery. Gel battery mainly adopts valve-controlled sealing technology, which is a kind of sealed battery. The colloidal electrolyte in a gel state does not flow in the battery, so it is not easy to leak acid. The colloidal electrolyte in the battery is conducive to maintaining sufficient pressure on the anode grid by the separator, which can effectively inhibit the shedding of the anode active material and the growth and penetration of lead dendrites, and prolong the battery life. During the charging and discharging process of the battery, the structure of the colloidal electrolyte will change due to the change of the acid concentration of the electrolyte. During the discharge process, due to the decrease of the acid concentration of the electrol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/10
CPCY02E60/10
Inventor 石光陈红雨罗穗莲侯琼
Owner SOUTH CHINA NORMAL UNIVERSITY
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