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Method for removing copper ions in vanadium electrolyte

A technology of electrolyte and copper ions, which is applied in the field of removing copper ions in vanadium electrolyte, can solve the problems of increasing the process flow and difficult control of the process, and achieve the effect of simple process flow, easy operation and stable properties

Inactive Publication Date: 2018-03-23
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

This method needs to reduce copper ions to cuprous ions, which increases the process flow and is difficult to control.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] For the known vanadium ion concentration of 2.5mol / L copper-containing vanadium electrolyte, the measured copper ion content is 1.5g / L. Take 1000ml of vanadium electrolyte, add 2.0g of sodium sulfide as a copper removal agent, and the reaction temperature is 80°C. After the reaction is completed, filter the precipitate. The content of copper ions in the filtrate was measured by ICP to be 80 mg / L, and the copper removal rate was 94.67%.

Embodiment 2

[0015] For the known vanadium ion concentration of 3.0mol / L copper-containing vanadium electrolyte, the measured copper ion content is 1.0g / L. Take 1000ml of vanadium electrolyte, add 2.5g of copper sulfide potassium sulfide, the reaction temperature is 70°C, and filter the precipitate after the reaction is completed. The content of copper ions in the filtrate was measured by ICP to be 60 mg / L, and the copper removal rate was 94.0%.

Embodiment 3

[0017] For the known vanadium ion concentration of 1.5mol / L copper-containing vanadium electrolyte, the measured copper ion content is 0.8g / L. Take 1000ml of vanadium electrolyte, add 1.0g of ammonium sulfide as a copper removal agent, the reaction temperature is 90°C, and filter the precipitate after the reaction is completed. The content of copper ions in the filtrate was measured by ICP to be 50 mg / L, and the copper removal rate was 93.75%.

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Abstract

The invention belongs to the field of battery materials, particularly relates to a method for removing copper ions in a vanadium electrolyte, and aims at solving the technical problem of providing a method for removing copper ions in a vanadium electrolyte. The method comprises the following steps of adding a copper removal agent into the copper-containing vanadium electrolyte, fully reacting, andfiltering, so as to obtain a pure vanadium electrolyte, wherein the copper removal agent is selected from at least one of hydrogen sulfide or sulfide. The method has the advantage that the copper ions in the vanadium electrolyte can be effectively removed, so that the vanadium electrolyte with stable property can be obtained.

Description

technical field [0001] The invention belongs to the field of battery materials, and in particular relates to a method for removing copper ions in a vanadium electrolyte. Background technique [0002] In recent years, renewable energy has been widely developed and utilized, but limited by the unstable and intermittent characteristics of renewable energy, it is difficult to effectively utilize renewable energy. In order to utilize renewable energy more efficiently, there is an increasing demand for large-scale energy storage devices. 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. [0003] As the energy storage carrier of vanadium battery, vanadium electro...

Claims

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Application Information

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IPC IPC(8): H01M8/008
CPCH01M8/008Y02W30/84
Inventor 陈勇彭穗刘波韩慧果
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD