Method for regenerating vanadium electrolyte by utilizing a vanadium battery invalidated positive electrode electrolyte of a sulfuric acid system

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

Inactive Publication Date: 2019-01-25
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • 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 positive 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

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  • Method for regenerating vanadium electrolyte by utilizing a vanadium battery invalidated positive electrode electrolyte of a sulfuric acid system
  • Method for regenerating vanadium electrolyte by utilizing a vanadium battery invalidated positive electrode electrolyte of a sulfuric acid system
  • Method for regenerating vanadium electrolyte by utilizing a vanadium battery invalidated positive electrode electrolyte of a sulfuric acid system

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Embodiment 1

[0036] Embodiment 1 adopts the inventive method to prepare vanadium battery electrolyte

[0037] 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 sulfate radical concentration in the vanadium electrolyte of the invalid positive electrode was measured to be 4.3mol / L; The volume is 20.0L. The vanadium ion concentration of the regenerated electrolyte is 1.6mol / L, and the sulfate radical concentration is 4.4mol / L. Therefore, according to the formula (1), the amount n1 of the required divalent solid vanadium sulfate is calculated to be 22.0mol, and the volume V2 of the regenerated electrolyte calculated according to the formula (2) is 32.5L, which is calculated according to the formula (3) The amount of substance required for sulfuric acid was 35.0 mol. Finally, according to the calculation results, 22.0 mol of divalent soli...

Embodiment 2

[0040] Embodiment 2 adopts the inventive method to prepare vanadium battery electrolyte

[0041] 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 sulfate radical concentration in the invalid vanadium electrolyte was 4.1mol / L; The volume is 30.0L. The vanadium ion concentration of the regenerated electrolyte is 1.7mol / L, and the sulfate radical concentration is 4.4mol / L. Therefore, according to the formula (1), the amount n1 of the required divalent solid vanadium sulfate is calculated to be 34.0mol, and the volume V2 of the regenerated electrolyte calculated according to the formula (2) is 50.0L, which is calculated according to the formula (3) The amount of substance required for sulfuric acid was 63.0 mol. Finally, according to the calculation results, add 34.0 mol of divalent solid vanadium sulfate and 63.0 mol of sulfuric acid to 30.0 L of spent vanadium ele...

Embodiment 3

[0042] Embodiment 3 adopts the inventive method to prepare vanadium battery electrolyte

[0043]Using chemical titration, the concentration of vanadium ions in the invalid positive vanadium electrolyte is 1.4mol / L, and the average valence state is +4.1; the sulfate radical concentration in the invalid vanadium electrolyte is 4.0mol / L; The volume is 50.0L. The vanadium ion concentration of the regenerated electrolyte is 1.6mol / L, and the sulfate radical concentration is 4.4mol / L. Therefore, according to the formula (1), the amount n1 of the required divalent solid vanadium sulfate is calculated to be 28.0mol, and the volume V2 of the regenerated electrolyte calculated according to the formula (2) is 61.25L, which is calculated according to the formula (3) The amount of substance required for sulfuric acid was 41.5 mol. Finally, according to the calculation results, 28 mol of divalent solid vanadium sulfate and 41.5 mol of sulfuric acid were added to 50.0 L of spent vanadium e...

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Abstract

The invention relates to a method for regenerating vanadium electrolyte by utilizing a vanadium battery invalidated positive electrode electrolyte of a sulfuric acid system, belonging to the field ofvanadium batteries. The invention solves the problem that the existing process for recovering and utilizing the failed vanadium electrolyte is tedious, A method for regenerating a vanadium electrolyteby using a positive electrode electrolyte of an invalidated vanadium battery is provided, comprising the steps of adding VSO4, H2SO4 and water to the positive electrode electrolyte to obtain a regenerated electrolyte, wherein sulfuric acid is used as a supporting electrolyte for the vanadium battery. The invention takes the positive electrode electrolyte of a failed vanadium battery as raw material to regenerate the electrolyte, the recovery rate can reach 100%, the process is simple and easy to operate, and the invention can be applied to the recovery and regeneration of the failed positiveelectrode vanadium electrolyte of a large-scale hydrochloric acid system, and has a broad popularization and application prospect.

Description

technical field [0001] The invention relates to a method for regenerating a vanadium electrolyte by utilizing the invalid positive 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 positi...

Claims

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Application Information

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IPC IPC(8): H01M10/42
CPCH01M10/4242Y02E60/10
Inventor 陈勇韩慧果杨晓陈婷
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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