An electrolyte admixture for improving the low-temperature stability of vanadium batteries and its preparation method

An electrolyte and stability technology, which is applied in the field of electrolyte admixtures for improving the low-temperature stability of vanadium batteries and its preparation, can solve the problems of high cost, labor and labor, and high cost of vanadium batteries, and reduce corrosion and material deposition , Improve the effect of continuous use

Active Publication Date: 2021-11-26
贵州聚能世纪科技有限责任公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In normal use, maintenance is performed by professionals every two months, which is expensive and labor-intensive
Moreover, the cost of vanadium batteries is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] An electrolyte admixture for improving the low-temperature stability of a vanadium battery, comprising the following components:

[0020] 4 parts of lauric acid, 1 part of disodium lauryl sulfosuccinate monoester, 0.4 parts of fatty alcohol polyoxyethylene ether (3) disodium sulfosuccinate monoester, 7 parts of monolauryl phosphate, 1 part of quinic acid Parts, 5 parts of quaternary ammonium salt, 15 parts of sulfuric acid solution.

[0021] The electrolyte admixture for improving the low-temperature stability of the vanadium battery described in this embodiment is prepared as follows:

[0022] (1) Add 10 parts of hexanamide and 1 part of potassium acetate to 80 parts of N,N-dimethylformamide, stir at 30°C for 10 minutes to obtain a mixed solution; under nitrogen protection, keep the temperature of the reaction vessel at 28°C, Add 40 parts of epichlorohydrin to the mixed solution in 3 times, after each addition of epichlorohydrin, stir for 1min before adding, react for...

Embodiment 2

[0026] An electrolyte admixture for improving the low-temperature stability of a vanadium battery, comprising the following components:

[0027] 5 parts of lauric acid, 2 parts of disodium lauryl sulfosuccinate monoester, fatty alcohol polyoxyethylene ether (3) 0.5 parts of disodium sulfosuccinate monoester, 8 parts of monolauryl phosphate, 2 parts of quinic acid part, 5 parts of quaternary ammonium salt, 15 parts of sulfuric acid solution; The concentration of described sulfuric acid solution is 0.1mol / L.

[0028] The electrolyte admixture for improving the low-temperature stability of vanadium batteries described in the present invention has a preparation method as follows:

[0029] (1) Add 10 parts of hexanamide and 1 part of potassium acetate to 90 parts of N,N-dimethylformamide, stir at 35°C for 10 minutes to obtain a mixed solution; under nitrogen protection, keep the temperature of the reaction vessel at 31°C, Add 50 parts of epichlorohydrin to the mixed solution in 5 ...

Embodiment 3

[0033] An electrolyte admixture for improving the low-temperature stability of a vanadium battery, comprising the following components:

[0034] 3 parts of lauric acid, 2 parts of disodium lauryl sulfosuccinate monoester, 0.5 parts of fatty alcohol polyoxyethylene ether (3) disodium sulfosuccinate monoester, 5 parts of monolauryl phosphate, 2 parts of quinic acid part, 3 parts of quaternary ammonium salt, 15 parts of sulfuric acid solution; The concentration of described sulfuric acid solution is 0.1mol / L.

[0035] The electrolyte admixture for improving the low-temperature stability of vanadium batteries described in the present invention has a preparation method as follows:

[0036](1) Add 10 parts of hexanamide and 1 part of potassium acetate to 80-90 parts of N,N-dimethylformamide, stir at 35°C for 15 minutes to obtain a mixed solution; under the protection of nitrogen, keep the temperature of the reaction vessel at 31 ℃, add 50 parts of epichlorohydrin to the mixed solut...

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Abstract

The invention relates to the technical field of electrolyte additives, in particular to an electrolyte additive for improving the low-temperature stability of vanadium batteries and a preparation method thereof, which comprises the following components: 3-5 parts of lauric acid, lauryl sulfosuccinic acid mono 1-2 parts of disodium ester, 0.3-0.5 parts of disodium sulfosuccinate monoester, 5-8 parts of monolauryl phosphate, 1-2 parts of quinic acid, quaternary ammonium 3-5 parts of salt, 10-15 parts of sulfuric acid solution. The richness of the admixture group of the present invention can improve the steric hindrance effect, reduce the generation of precipitation, improve the stability of the electrolyte, have a significant effect on the improvement of the fluidity of the electrolyte, and can enhance the action time of the electrolyte during use. Improve the continuous use effect of the battery.

Description

technical field [0001] The invention relates to the technical field of electrolyte admixtures, in particular to an electrolyte admixture for improving the low-temperature stability of a vanadium battery and a preparation method thereof. Background technique [0002] All-vanadium redox flow battery, referred to as vanadium redox battery (Vanadium Redox Battery, abbreviated as VRB), is a redox battery in which the active material is in a circulating liquid state. The different chemical potentials of vanadium ions in different oxidation states are used to preserve energy. It has the advantages of high charge and discharge efficiency, the capacity can be increased with the increase of the liquid storage tank, and the electrolyte can be recycled. Specifically, vanadium batteries feature long system life. The service life of vanadium battery is more than 10 years. The system efficiency is high. The cycle efficiency of the vanadium battery system can reach 65-80%. Support freq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/18
CPCH01M8/188Y02E60/50
Inventor 郑翔宇何永强蒋康王金龙郭光平李梦萱
Owner 贵州聚能世纪科技有限责任公司
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