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Method for regenerating vanadium electrolyte by utilizing invalid negative electrolyte of sulfuric acid system vanadium battery

A negative electrode electrolyte and sulfuric acid system technology, applied in the field of vanadium batteries, can solve the problems of cumbersome recycling process and low utilization rate of invalid vanadium electrolyte, and achieve the effects of easy operation, avoiding waste, and simple process

Inactive Publication Date: 2019-03-08
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for regenerating the vanadium electrolyte by using the invalid negative electrode electrolyte of the vanadium battery in the sulfuric acid system, so as to solve the problems of cumbersome recycling process and low utilization rate of the existing invalid vanadium electrolyte

Method used

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  • Method for regenerating vanadium electrolyte by utilizing invalid negative electrolyte of sulfuric acid system vanadium battery
  • Method for regenerating vanadium electrolyte by utilizing invalid negative electrolyte of sulfuric acid system vanadium battery
  • Method for regenerating vanadium electrolyte by utilizing invalid negative electrolyte of sulfuric acid system vanadium battery

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Embodiment 1

[0040] Embodiment 1 adopts the inventive method to prepare vanadium battery electrolyte

[0041] Using the chemical titration method, the concentration of vanadium ions in the invalid negative electrode vanadium electrolyte was measured to be 1.5mol / L, and the average valence state was +3.4; the sulfate radical concentration in the invalid negative electrode vanadium electrolyte was measured to be 4.3mol / L; The volume is 20.0L. The vanadium ion concentration in the tetravalent vanadyl sulfate solution is 4.0mol / L. The vanadium ion concentration of the regenerated electrolyte is 1.6mol / L, and the sulfate radical concentration is 4.4mol / L. Therefore, calculate according to formula (1) the amount of substance n1 that obtains required vanadyl sulfate is 6.0mol, calculate the volume of needed 4.0mol / L tetravalent vanadyl sulfate solution according to formula (2) and be 1.5L, according to formula (3) The volume V2 of the regenerated electrolyte is calculated to be 22.5 L, and the ...

Embodiment 2

[0044] Embodiment 2 adopts the inventive method to prepare vanadium battery electrolyte

[0045] Using the chemical titration method, the concentration of vanadium ions in the invalid negative electrode vanadium electrolyte was measured to be 1.5mol / L, and the average valence state was +2.8; the sulfate radical concentration in the invalid negative electrode vanadium electrolyte was measured to be 4.0mol / L; The volume is 20.0L. The vanadium ion concentration in the tetravalent vanadyl sulfate solution is 6.0mol / L. The vanadium ion concentration of the regenerated electrolyte is 1.6mol / L, and the sulfate radical concentration is 4.4mol / L. Therefore, according to formula (1), calculate the amount n1 of the substance that obtains required vanadyl sulfate to be 42.0mol, calculate the volume of required 6.0mol / L tetravalent vanadyl sulfate solution according to formula (2) and be 7.0L, according to The volume V2 of the regenerated electrolyte calculated by the formula (3) is 45.0...

Embodiment 3

[0046] Embodiment 3 adopts the inventive method to prepare vanadium battery electrolyte

[0047] Using the chemical titration method, the concentration of vanadium ions in the vanadium electrolyte of the invalid negative electrode was measured to be 2.0mol / L, and the average valence state was +3.2; the concentration of sulfate radicals in the vanadium electrolyte of the invalid negative electrode was measured to be 4.1mol / L; The volume is 20.0L. The vanadium ion concentration in the tetravalent vanadyl sulfate solution is 1.5mol / L. The vanadium ion concentration of the regenerated electrolyte is 1.6mol / L, and the sulfate radical concentration is 4.3mol / L. Therefore, calculate according to formula (1) the amount of substance n1 that obtains required vanadyl sulfate is 24.0mol, calculate the volume of required 1.5mol / L tetravalent vanadyl sulfate solution according to formula (2) and be 16.0L, according to The volume V2 of the regenerated electrolyte calculated by the formula ...

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Abstract

The invention relates to a method for regenerating vanadium electrolyte by utilizing invalid negative electrolyte of a sulfuric acid system vanadium battery and belongs to the field of vanadium batteries. The invention aims at solving the problems that an existing invalid vanadium electrolyte recycling technology is tedious and utilization rate is low. According to the technical scheme, the provided method for regenerating the vanadium electrolyte by utilizing the invalid negative electrolyte of the sulfuric acid system vanadium battery comprises the step of adding VOSO4 aqueous solution, H2SO4 and water into negative electrolyte, thus regenerated electrolyte is obtained, wherein the vanadium battery takes sulfuric acid as supporting electrolyte. By adopting the regeneration method provided by the invention, negative electrolyte of an invalid vanadium battery can be recycled at a recycling rate of 100%, so that waste of resources is avoided, and pollution can not be produced to the environment; meanwhile, electrochemical activities of the regenerated electrolyte are basically the same with those of normally used vanadium battery electrolyte, so that reuse requirement is met.

Description

technical field [0001] The invention relates to a method for regenerating the vanadium electrolyte by utilizing the invalid negative electrode electrolyte of a vanadium battery in a sulfuric acid system, and belongs to the field of vanadium batteries. Background technique [0002] Due to its independent output power and capacity, vanadium battery has the advantages of large power and capacity, long cycle life, high energy efficiency, good deep charge and discharge performance, and high safety performance. It is considered to be one of the most promising large-scale storage batteries. Energy-saving batteries are attracting more and more attention. With the charge and discharge of the vanadium battery, there will be vanadium ion migration between the positive and negative electrolytes, oxidation of divalent vanadium ions in the negative electrolyte, hydrogen evolution at the negative electrode, etc., resulting in the concentration and valence state of vanadium ions in the posi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18
CPCH01M8/188Y02E60/50
Inventor 陈勇韩慧果李道玉龙秀丽
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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