A method for regenerating vanadium electrolyte from the cathode electrolyte of a failed vanadium battery

A positive electrolyte and electrolyte technology, applied in the field of vanadium batteries, can solve the problems of low utilization rate, cumbersome recycling process of invalid vanadium electrolyte, etc., and achieve the effects of easy operation, avoiding waste, and simple process

Inactive Publication Date: 2019-01-04
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for regenerating the vanadium electrolyte by using the positive electrolyte of the invalid vanadium battery, 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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  • A method for regenerating vanadium electrolyte from the cathode electrolyte of a failed vanadium battery
  • A method for regenerating vanadium electrolyte from the cathode electrolyte of a failed vanadium battery
  • A method for regenerating vanadium electrolyte from the cathode electrolyte of a failed vanadium battery

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Embodiment 1

[0037] Embodiment 1 adopts the inventive method to prepare vanadium battery electrolyte

[0038] Using the chemical titration method, the concentration of vanadium ions in the vanadium electrolyte of the invalid positive electrode was measured to be 1.5mol / L, and the average valence state was +4.6; the concentration of chloride ions in the vanadium electrolyte of the invalid positive electrode was measured to be 5.6mol / L; The volume is 20.0L. The vanadium ion concentration of the regenerated electrolyte is 1.6mol / L, and the chloride ion concentration is 6.4mol / L. Therefore, calculate according to formula (1) the amount of substance n1 of required divalent solid vanadium dichloride to be 22.0mol, calculate the volume V2 of regenerated electrolyte according to formula (2) be 32.5L, calculate according to formula (3) The amount of material to give the desired HCl was 52.0 mol. Finally, according to the calculation results, add 22.0 mol of divalent vanadium dichloride and 52.0 m...

Embodiment 2

[0041] Embodiment 2 adopts the inventive method to prepare vanadium battery electrolyte

[0042] Using chemical titration, the concentration of vanadium ions in the invalid positive vanadium electrolyte was 1.7mol / L, and the average valence state was +4.5; the chlorine ion concentration in the invalid vanadium electrolyte was 6.1mol / L; The volume is 30.0L. The vanadium ion concentration of the regenerated electrolyte is 1.7mol / L, and the chloride ion concentration is 6.4mol / L. Therefore, calculate according to formula (1) the amount of substance n1 of required divalent solid vanadium dichloride to be 34.0mol, calculate the volume V2 of regenerated electrolyte according to formula (2) be 50.0L, calculate according to formula (3) The amount of material to give the desired HCl was 69.0 mol. Finally, according to the calculation results, add 34.0mol of divalent solid vanadium dichloride and 69.0mol of HCl to the 30.0L spent vanadium electrolyte, and then adjust the volume of the...

Embodiment 3

[0043] Embodiment 3 adopts the inventive method to prepare vanadium battery electrolyte

[0044]Using chemical titration, the concentration of vanadium ions in the invalid positive vanadium electrolyte was 1.4mol / L, and the average valence state was +4.1; the chlorine ion concentration in the invalid vanadium electrolyte was 5.8mol / L; The volume is 50.0L. The vanadium ion concentration of the regenerated electrolyte is 1.6mol / L, and the chloride ion concentration is 6.4mol / L. Therefore, calculate according to formula (1) the amount of substance n1 of required divalent solid vanadium dichloride to be 28.0mol, calculate the volume V2 of regenerated electrolyte according to formula (2) be 61.25L, calculate according to formula (3) The amount of material to give the desired HCl was 41.5 mol. Finally, according to the calculation results, add 28.0 mol of divalent solid vanadium dichloride and 46.0 mol of HCl to 50.0 L of spent vanadium electrolyte, and then adjust the volume of t...

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Abstract

The invention relates to a method for regenerating a vanadium electrolyte by using a positive electrode electrolyte of a failed vanadium battery, belonging to the field of vanadium batteries. The invention solves the problem that the existing process for recovering and utilizing the failed vanadium electrolyte is tedious, The technical scheme provides a method for regenerating vanadium electrolyteby using a positive electrode electrolyte of an invalidated vanadium battery, comprising the steps of adding vanadium dichloride, HCl and water to the positive electrode electrolyte to obtain a regenerated electrolyte, wherein the invalidated vanadium battery uses hydrochloric acid as a supporting electrolyte. As that regeneration method of the invention can recover the positive electrode electrolyte of the vanadium battery with a recovery rate of 100%, the waste of resource is avoided, the environment is not pollute, and the electrochemical activity of the regenerated electrolyte is basically identical with that of the normally used vanadium battery electrolyte, so that the requirement of reuse is met.

Description

technical field [0001] The invention relates to a method for regenerating a vanadium electrolyte by using the anode electrolyte of an invalid vanadium battery, 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 positive and negative electrolytes being inconsi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/008
CPCH01M8/008Y02W30/84
Inventor 陈勇韩慧果杨晓李道玉
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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