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Regeneration method of electrolyte for failed vanadium batteries

An electrolyte and vanadium battery technology, which is 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: 2018-12-21
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 electrolyte of invalid vanadium batteries, so as to solve the problems of cumbersome recovery and utilization process and low utilization rate of the existing invalid vanadium electrolyte

Method used

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  • Regeneration method of electrolyte for failed vanadium batteries
  • Regeneration method of electrolyte for failed vanadium batteries
  • Regeneration method of electrolyte for failed vanadium batteries

Examples

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Effect test

Embodiment 1

[0050] Embodiment 1 adopts the method of the present invention to regenerate vanadium battery electrolyte

[0051] Using the chemical titration method, the concentration of vanadium ions in the invalid vanadium electrolyte was measured to be 1.5mol / L, and the average valence state of vanadium ions was +3.8; the concentration of chloride ions in the invalid vanadium electrolyte was measured to be 6.5mol / L; The volume of the liquid is 20.0 L. The vanadium ion concentration of the regenerated electrolyte is 1.6mol / L, and the chloride ion concentration is 7.0mol / L. Therefore, calculate according to formula (1) the amount of substance n1 that needs vanadium trichloride is 18.0mol, calculate the volume V2 of regenerated electrolytic solution according to formula (3) be 30.0L, calculate according to formula (4) The amount of material required for HCl was 53.0 mol. Finally, according to the calculation results, 18.0 mol of vanadium trichloride and 26.0 mol of HCl were added to the 2...

Embodiment 2

[0054] Embodiment 2 adopts the method of the present invention to regenerate vanadium battery electrolyte

[0055] Using the chemical titration method, the concentration of vanadium ions in the invalid vanadium electrolyte was measured to be 1.6mol / L, and the average valence state of vanadium ions was +4.4; the concentration of chloride ions in the invalid vanadium electrolyte was measured to be 6.8mol / L; The volume of the liquid was 20.0 L. The vanadium ion concentration of the regenerated electrolyte is 1.6mol / L, and the chloride ion concentration is 7.0mol / L. Therefore, calculate according to formula (1) the amount of substance n1 that needs vanadium trichloride to be 57.6mol, calculate the volume V2 of regeneration electrolytic solution according to formula (3) be 56.0L, calculate according to formula (4) and draw all The amount of material required for HCl was 83.2 mol. Finally, according to the calculation results, 57.6 mol of vanadium trichloride and 83.2 mol of HCl w...

Embodiment 3

[0056] Embodiment 3 adopts the method of the present invention to regenerate vanadium battery electrolyte

[0057] Using the chemical titration method, the concentration of vanadium ions in the invalid vanadium electrolyte was measured to be 1.7mol / L, and the average valence state of vanadium ions was +3.2; the concentration of chloride ions in the invalid vanadium electrolyte was measured to be 7.1mol / L; The volume of the liquid was 30.0 L. The vanadium ion concentration of the regenerated electrolyte is 1.6mol / L, and the chloride ion concentration is 7.0mol / L. Therefore, calculate according to formula (2) the amount of substance n2 of required vanadyl dichloride to be 30.6mol, calculate the volume V2 of regenerated electrolyte according to formula (3) be 51.0L, calculate according to formula (5) and draw all The amount of material required for HCl was 82.8 mol. Finally, according to the calculation results, add 30.6 mol of vanadium oxychloride and 82.8 mol of HCl to the 30...

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Abstract

The invention relates to a regeneration method of an electrolyte of a failed vanadium battery, belonging to the field of vanadium batteries. The invention solves the problem that the existing processfor recovering and utilizing the failed vanadium electrolyte is tedious, The technical scheme provides a regeneration method of a failed vanadium battery electrolyte, comprising the steps of adding vanadium trichloride or vanadium dichloride, HCl and water to the failed electrolyte, and obtaining a regenerated electrolyte, wherein hydrochloric acid is used as a supporting electrolyte for the failed vanadium battery electrolyte. The regeneration method of the invention can recover the electrolyte of the fail vanadium battery with a recovery rate of 100%, the waste of resources is avoid, the environment is not polluted, and the electrochemical activity of the regenerated electrolyte is basically consistent with that of the normally used electrolyte of the vanadium battery, and the requirement of reuse is met. The regeneration method of the invention can recover the electrolyte of the failed vanadium battery with a recovery rate of 100%, thus avoiding waste of resource and pollution of environment. The process of the invention is very simple and easy to operate, and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to a method for regenerating an electrolyte solution of a spent 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 inconsistent. Matching, when the utiliz...

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 陈勇刘波龙秀丽陈婷
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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