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Gelled electrolyte of vanadium battery and vanadium battery

A technology of colloidal electrolyte and vanadium battery, applied in the field of vanadium battery, can solve the problems of poor cycle stability and low utilization rate of electrolyte

Active Publication Date: 2011-04-06
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stability and conductivity of the electrolyte with additives are improved, but the migration of water and vanadium in the electrolyte is not improved during the operation of the vanadium battery, the utilization rate of the electrolyte is low, the cycle stability is poor, and it needs to be frequently maintain

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The preparation method of colloidal electrolyte solution of the present invention can adopt various methods to carry out, for example preferably this method is, obtain each component of colloidal electrolyte solution according to above-mentioned content ratio, then add gelatin and silicon dioxide in the aqueous solution of sulfuric acid, in Heat to 50-60°C with stirring, and stir them evenly until the gelatin and silicon dioxide are completely dissolved; after the obtained solution is cooled to room temperature, add vanadyl sulfate to dissolve in the obtained solution, and stir evenly until Vanadyl sulfate is completely dissolved, and then add alkali metal or alkaline earth metal sulfate, metal indium salt, C 1 -C 4 Alkyl ammonium sulfate and glycerin are stirred evenly until they are completely dissolved to obtain a colloidal electrolyte solution for a vanadium battery.

[0018] In the above-mentioned preparation method, in order to form a stable sulfuric acid hydroso...

Embodiment 1

[0023] Prepare colloidal electrolyte.

[0024] Add 24 grams of gelatin and 20.2 grams of fumed silicon dioxide in 1L of sulfuric acid (analytically pure) aqueous solution with a concentration of 3mol / L, heat to 50°C under stirring, and stir them evenly until the gelatin and silicon dioxide are completely dissolved; After the solution cooling that obtains, add 348 grams of vanadyl sulfate crystals that contain 4 crystal waters, make it be dissolved in the solution that obtains, stir until vanadyl sulfate dissolves completely, then add 35.4 grams of sodium sulfate (analytical pure) successively , 17 gram indium nitrate (analytical pure), 28 gram n-tetrabutyl ammonium bisulfate (analytical pure) and 25.5 gram glycerin (analytical pure), stir until completely dissolving, obtain the colloid that the vanadium battery that density is 1.36 g / ml electrolyte.

Embodiment 2

[0028] Prepare colloidal electrolyte.

[0029] Add 30 grams of gelatin and 23.8 grams of fumed silicon dioxide in 1L of sulfuric acid (analytical pure) aqueous solution with a concentration of 3mol / L, heat to 50°C under stirring, and stir them evenly until the gelatin and silicon dioxide are completely dissolved; After the solution cooling that obtains, add 478 grams of vanadyl sulfate crystals that contain 4 crystal waters, make it be dissolved in the solution that obtains, stir until vanadyl sulfate dissolves completely, then add 41.7 grams of sodium sulfate (analytical pure) successively , 20 gram indium nitrate (analytical pure), 33 gram n-tetrabutyl ammonium bisulfate (analytical pure) and 30 gram glycerin (analytical pure), stir until completely dissolving, obtain the colloid that the vanadium battery of 1.4 g / ml density is used electrolyte.

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Abstract

The invention provides gelled electrolyte of a vanadium battery and the vanadium battery employing the gelled electrolyte. The gelled electrolyte comprises sulfuric acid, vanadyl sulfate, gelatin and an additive, wherein the additive comprises one or more of silicon dioxide, sulfate of alkali metal and / or alkaline earth, glycerol, salt of metal indium, and C1-C4 ammonium ethoxylated alkyl sulfate. The gelled electrolyte can weaken the migration of water along with protons on two sides of a diaphragm of the vanadium battery to ensure that the phenomenon of unbalanced concentration and volume of electrolyte ions at positive and negative poles is improved, and also can weaken the migration of vanadium oxide ions along with the protons on the two sides of the diaphragm of the vanadium batteryto ensure that the self discharge of the vanadium battery is reduced; therefore, the cyclical stability of the vanadium battery can be improved, and the capillary seepage phenomenon of the electrolyte along with the diaphragm is stopped so as to avoid leakage.

Description

technical field [0001] The invention relates to a colloidal electrolyte solution for a vanadium battery, and also relates to a vanadium battery using the colloidal electrolyte solution. Background technique [0002] All-vanadium ion flow battery (namely, vanadium battery, VBR) is a redox flow battery in which the active material is in a cyclic flow state. It uses a vanadium-containing solution as the positive and negative electrolytes, and completes electron exchange on the positive and negative electrodes. , to realize its charge and discharge; vanadyl sulfate is mainly used as the active material of the battery. Vanadyl sulfate, sulfuric acid and water are prepared in proportion to the vanadium electrolyte, and the vanadium battery is composed of appropriate electrode materials, battery casings, electrolyte storage tanks and electrolyte delivery systems. [0003] Since the active material of the vanadium battery is stored in the liquid storage tank outside the stack, comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M10/02H01M8/24H01M8/18H01M10/36
CPCY02E60/12Y02E60/528Y02E60/10Y02E60/50
Inventor 赵瑞兰李世彩
Owner BYD CO LTD
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