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Storage battery colloidal electrolyte and preparation method thereof

A colloidal electrolyte and storage battery technology, applied in the electrolyte field, can solve the problems of 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 purpose of the present invention is 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

[0019] Under constant stirring, 3.0g specific surface area is 400m 2 / g gas phase nano-SiO 2 Gradually added to 91.99g dilute sulfuric acid solution with a mass concentration of 35%, heated up to 50°C and stirred vigorously for 2 hours, then cooled to room temperature to obtain dispersion A; Add the needle-like sauconite whiskers of 5 into the dispersion A, and continue to stir vigorously for 10 hours to obtain the dispersion B; under stirring conditions, dissolve 1 g of starch, 0.5 g of sodium sulfate, and 3.5 g of phosphoric acid into the dispersion B , and continue to stir for 1 hour to obtain a colloidal electrolyte with good thixotropic fluidity and gel stability. The viscosity of the control colloid without acicular sauconite whiskers was 1206 mPa.s, and the viscosity of the colloid after adding acicular sauconite whiskers was 108 mPa.s.

Embodiment 2

[0021] Under constant stirring, 12g specific surface area is 100m 2 / g gas phase nano-SiO 2 Gradually added to 75.8g dilute sulfuric acid solution with a mass concentration of 40%, heated up to 50°C and stirred vigorously for 8 hours, then cooled to room temperature to obtain dispersion A; About 50 needle-shaped olivine whiskers were added to the dispersion A, and continued to stir vigorously for 4 hours to obtain the dispersion B; under stirring conditions, 1.5g konjac powder, 4.0g sodium sulfate, 0.1g cobalt sulfate, Dissolve 6.5g of phosphoric acid in the dispersion B, and continue to stir for 2 hours to obtain a colloidal electrolyte with good thixotropic fluidity and gel stability. The viscosity of the control colloid without acicular mertonite whiskers was 2964mPa.s, and the viscosity of the colloid after adding acicular merlotite whiskers was 391mPa.s.

Embodiment 3

[0023] Under constant stirring, 10.2g of specific surface area is 200m 2 / g gas phase SiO 2 Gradually added to 80g of dilute sulfuric acid solution with a concentration of 45%, heated to 50°C and stirred vigorously for 8 hours, and cooled to room temperature to obtain dispersion A; under constant stirring, 0.05g of The wollastonite needle crystals were added to the dispersion liquid A, and the vigorous stirring was continued for 9 hours to obtain the dispersion liquid B; under stirring conditions, 3.0 g sodium alginate, 2.0 g sodium sulfate, 0.2 g cobalt sulfate, and 5.5 g phosphoric acid were dissolved into the dispersion B and continue to stir for 3 hours to obtain a colloidal electrolyte with good thixotropic fluidity and gel stability. The viscosity of the control colloid without wollastonite needle crystals was 2371mPa.s, and the viscosity of the colloid after adding wollastonite needle crystals was 203mPa.s.

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Abstract

The invention relates to a storage battery colloidal electrolyte containing natural acicular nanocrystalline or microfiber, mainly comprising the following components in weight ratio: 3.0-12 percent of gelatinizing agent (silicon-contained gel), 0.01-0.1 percent of flow improver, 5.0-13.8 percent of complex additive and the balance of electrolyte (a sulfuric acid dilute solution), wherein the flow improver is the natural acicular nanocrystalline or microfiber. The colloidal electrolyte has good thixotropic flowability and gel stability and low colloidal kinetic viscosity; the glue pouring efficiency of the colloidal electrolyte and the immersional wetting effect of the colloidal electrolyte on a partition board and a polar plate are improved, and the resistance of the colloidal electrolyte is reduced; and therefore, the colloidal electrolyte can be used for assembling storage batteries with different applications and different modes.

Description

technical field [0001] The invention relates to an electrolyte used in storage batteries, in particular to a colloidal electrolyte. Background technique [0002] The application of gel electrolyte instead of liquid electrolyte is an important new technology for lead-acid batteries. The colloidal electrolyte in the gel state does not flow in the battery, so it is not easy to leak acid, which can effectively prevent the active material from falling off, effectively inhibit the growth and penetration of lead dendrites, reduce battery self-discharge, and prolong battery life. Gel battery mainly adopts valve control technology, which is a kind of sealed battery. Compared with AGM valve-regulated batteries, gel batteries have obvious advantages during use, which is beneficial to prolong the cycle life of batteries. However, since the viscosity of the colloidal electrolyte used in the colloidal battery is much higher than that of the ordinary sulfuric acid electrolyte, this bring...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/10H01M10/12
CPCY02E60/10Y02P70/50
Inventor 石光陈红雨罗穗莲侯琼
Owner SOUTH CHINA NORMAL UNIVERSITY
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