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Method for manufacturing high-purity vanadium battery electrolyte

A high-purity, electrolyte technology, applied in the direction of regenerative fuel cells, can solve the problems of increased impurity content, difficulty in ensuring product purity, and high production costs, so as to reduce the content of impurities, meet the use requirements, and reduce production costs.

Active Publication Date: 2012-02-15
承德新新钒钛储能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Those skilled in the art know that a variety of raw materials are used in the preparation of the vanadium battery electrolyte, which will inevitably lead to an increase in the content of impurities, it is difficult to ensure the purity of the product, and the corresponding production cost is also high.

Method used

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  • Method for manufacturing high-purity vanadium battery electrolyte
  • Method for manufacturing high-purity vanadium battery electrolyte

Examples

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Embodiment 1

[0034] A method for preparing a high-purity vanadium battery electrolyte, first dissolving 208g of vanadium pentoxide in 1000mL of sulfuric acid solution with a volume ratio of 1:1 and heating to 60°C for activation; The sulfur dioxide reducing agent is reduced to obtain a vanadyl sulfate solution; the resulting solution is electrolytically reduced in a diaphragm electrolytic cell to obtain high-purity V 3+ / V 4+ Mix the electrolyte.

Embodiment 2

[0036] A method for preparing a high-purity vanadium battery electrolyte, first dissolving 180g of vanadium pentoxide in 1000mL of sulfuric acid solution with a volume ratio of 1:1 and heating to 100°C for activation; Sulfur dioxide reducing agent is reduced to obtain vanadyl sulfate solution; the vanadyl sulfate solution is placed in a crystallization tank for crystallization, and then transferred to centrifugal separation equipment for centrifugal separation to obtain vanadyl sulfate crystals, and its purity is detected; after the crystal purity meets the requirements , dissolve the crystals in high-purity water, and adjust the concentration of sulfuric acid in the solution to 3mol / L with sulfuric acid. The resulting solution was electrolytically reduced in a diaphragm electrolytic cell to obtain high-purity V 3+ / V 4+ Mix the electrolyte.

Embodiment 3

[0038] A method for preparing a high-purity vanadium battery electrolyte, first dissolving 220g of vanadium pentoxide in 1000mL of sulfuric acid solution with a volume ratio of 1:2 and heating to 40°C for activation; The sulfur dioxide reducing agent is reduced to obtain vanadyl sulfate solution; the vanadyl sulfate solution is placed in a crystallization tank for crystallization, and then transferred to centrifugal separation equipment for centrifugation to obtain vanadyl sulfate crystals, and its purity is detected; if the vanadyl sulfate crystals If the purity does not meet the requirements after testing, the crystals can be dissolved in high-purity water and recrystallized in a recrystallization tank to obtain high-purity vanadyl sulfate crystals. Then dissolve the crystals meeting the purity requirements in high-purity water, and adjust the concentration of sulfuric acid in the solution to 1.5 mol / L with sulfuric acid. The resulting solution is electrolytically reduced in...

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Abstract

The invention relates to a method for manufacturing a high-purity vanadium battery electrolyte, comprising the following steps of: firstly, adding vanadium pentoxide to a sulfuric acid solution for heating and activating; adding a high-purity reducing agent for reduction; and electrolyzing and reducing the obtained vanadicsulfate solution in a diaphragm electrolytic tank so as to obtain the high-purity vanadium battery electrolyte. In the high-purity vanadium battery electrolyte manufactured by the method, the impurity contents are controlled below 10ppm; the high-purity vanadium battery electrolyte can be used as the electrolyte of an anode and cathode of a vanadium battery and meets the use requirements of the vanadium battery; and the production cost of the electrolyte is reduced.

Description

technical field [0001] The invention belongs to the technical field of battery preparation, and in particular relates to a method for preparing high-purity vanadium battery electrolyte by using common-purity raw materials. Background technique [0002] The full name of the vanadium battery is a vanadium redox flow battery (Vanadium Redox Battery, abbreviated as VRB), which is a redox battery in which the active material is in a circulating liquid state. Vanadium battery is a very promising green energy storage battery, which does not produce harmful substances in the process of manufacture, use and disposal. With a special battery structure, the active material is stored in the liquid storage tank outside the stack. Compared with the traditional solid-phase battery, the vanadium battery has the advantages of small concentration polarization, large battery capacity, easy adjustment, long life, and high performance. Due to the advantages of high current charging and dischargi...

Claims

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Application Information

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IPC IPC(8): H01M8/18
CPCY02E60/50
Inventor 张群赞扈显琦谭欣惠
Owner 承德新新钒钛储能科技有限公司
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