Method for preparing vanadium pentoxide by utilizing invalid vanadium battery positive pole electrolyte

A cathode electrolyte, vanadium pentoxide technology, applied in the field of vanadium batteries, can solve the problems of unusability, precipitation, and the valence mismatch of vanadium ions, and achieve the effect of recycling and reuse and high purity

Active Publication Date: 2017-02-15
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the vanadium battery electrolyte has been recycled for a long time, the concentration of vanadium ions and sulfuric acid seriously exceeds the standard, the valence state of vanadium ions does not match, and even precipitation occurs, making it unusable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] (3) Preparation of vanadium pentoxide: filter the solid-liquid mixture (mixed solution containing pentavalent vanadium precipitate) obtained in step (2), dry and grind the filter cake to obtain vanadium pentoxide powder.

[0019] In order to better understand the above exemplary embodiments of the present invention, it will be further described below in conjunction with specific examples.

[0020] Charge and pre-oxidize the exhausted electrolyte of the positive electrode of the vanadium battery to prepare 10L pentavalent electrolyte (1 # Electrolyte) for later use, and the electrolyte needs to be stored at low temperature.

example 1

[0022] Measure 500ml 1 # The electrolytic solution was evaporated and concentrated on an electric furnace and continuously stirred until the volume of the solution was 270ml; the resulting solution was removed and allowed to stand for 24 hours, then filtered and dried to obtain 43.69g of filter cake, and the calculated vanadium yield was 60.01%. Cake grinding to obtain vanadium pentoxide powder.

example 2

[0024] Measure 1000ml 1 # The electrolytic solution was evaporated and concentrated on an electric furnace and continuously stirred until the volume of the solution was 530ml; the resulting solution was removed and allowed to stand for 48 hours, then filtered and dried to obtain a filter cake of 94.82g, and the calculated vanadium yield was 65.12%. Grinding to obtain vanadium pentoxide powder.

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PUM

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Abstract

The invention provides a method for preparing vanadium pentoxide by utilizing invalid vanadium battery positive pole electrolyte. The method comprises the following steps that the invalid vanadium battery positive pole electrolyte is led into a vanadium battery positive pole, charging pre-oxidation is performed to obtain electrolyte of pentavalent vanadium ions; evaporation and concentration are conducted on the electrolyte of pentavalent vanadium ions, and then standing is performed to form mixed liquid containing a pentavalent vanadium precipitate; the mixed liquid is filtered, and a filter cake is dried and grinded to obtain vanadium pentoxide powder. By the adoption of the method, recycle of vanadium electrolyte is achieved, and the produced vanadium pentoxide is high in purity and can be continuously used for preparing electrolyte and other purposes or used as a catalyst.

Description

technical field [0001] The invention relates to the field of vanadium batteries, more specifically, relates to a method for preparing vanadium pentoxide by utilizing the spent vanadium battery anode electrolyte. Background technique [0002] The full name of vanadium battery is vanadium redox flow battery, which has a series of advantages such as long service life, large capacity, high power and high safety performance. Based on its unique advantages, the vanadium battery energy storage system can be applied in a wide range of fields. It can be used as an emergency power supply facility in places such as hospitals, factories, military bases, and office buildings; it can also be used for "fast recharging" of vehicles by replenishing or replacing electrolyte at gas stations; it can be used as communications, radio relay stations, railway information Power supply system for instructions, military devices, etc.; can be used as an onboard power supply for industrial trucks, fork...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02H01M8/18
CPCC01G31/02H01M8/188Y02E60/50
Inventor 刘波彭穗陈婷曹敏龙秀丽李道玉韩慧果陈勇
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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