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Electrode modification method for vanadium battery

An electrode modification, vanadium battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of decreased electrode conductivity, high heat treatment energy consumption, difficult operation, etc. Effect

Pending Publication Date: 2022-03-04
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

However, these modification methods have certain problems. For example, heteroatom doping will introduce some elements that are unfavorable to the performance of vanadium batteries. Electrode conductivity drops

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take a carbon fiber felt of a certain size and immerse it in acetone at room temperature for 18 hours, then take it out, then ultrasonically clean the carbon fiber felt with ethanol / water (50% ethanol content), put it in an oven and dry it at 60°C; weigh 0.6 The sodium orthovanadate dodecahydrate of 1.6 g and the thioacetamide of 1.6 g are added to 40 ml of distilled water, and after stirring for 40 min, they are transferred to the liner of a polytetrafluoroethylene reactor; Put the precursor solution in the reaction kettle, put it into the blast drying oven and heat it at 160°C for 24 hours; after the heating, take out the reaction kettle, filter to obtain the carbon fiber felt containing vanadium disulfide, and put the carbon fiber felt containing vanadium disulfide in the Soak in methylpyrrolidone solution at room temperature for 3 hours of ultrasonic vibration, then let it stand for 40 minutes; take out the electrode, soak it in acetone for 36 hours, wash it with dis...

Embodiment 2

[0042] Take a carbon fiber felt of a certain size and immerse it in acetone for 24 hours at room temperature, take it out, and then ultrasonically clean the carbon fiber felt with ethanol / water (50% ethanol content), put it in an oven and dry it at 70°C; weigh 0.7 The sodium orthovanadate dodecahydrate of 1.0 g and the thioacetamide of 1.7 g are added to 45 ml of distilled water, and after stirring for 50 min, they are transferred to the liner of a polytetrafluoroethylene reactor; the pretreated carbon fiber felt is soaked in a Put the precursor solution in the reaction kettle, put it into the blast drying oven and heat it at 180°C for 30h; after the heating, take out the reaction kettle, filter to obtain the carbon fiber felt containing vanadium disulfide, and put the carbon fiber felt containing vanadium disulfide in the Soak in methylpyrrolidone solution at room temperature for ultrasonic vibration for 4 hours, then let it stand for 50 minutes; take out the electrode, soak i...

Embodiment 3

[0044]Take a carbon fiber felt of a certain size and immerse it in acetone for 30 hours at room temperature, then take it out, then ultrasonically clean the carbon fiber felt with ethanol / water (the ethanol content is 50%), put it in an oven and dry it at 70°C; weigh 0.8 The sodium orthovanadate dodecahydrate of 1.8 g and the thioacetamide of 1.8 g are added to 50 ml of distilled water, stirred for 60 min, and transferred to the lining of a polytetrafluoroethylene reactor; the pretreated carbon fiber felt is soaked in a Put the precursor solution in the reactor, put it into the blast drying oven and heat it at 200°C for 36 hours; take out the reactor after heating, filter to obtain the carbon fiber felt containing vanadium disulfide, and put the carbon fiber felt containing vanadium disulfide in the Soak in methylpyrrolidone solution at room temperature for ultrasonic vibration for 5 hours, then let it stand for 60 minutes; take out the electrode, soak it in acetone for 48 hour...

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PUM

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Abstract

The invention discloses an electrode modification method for a vanadium battery. The electrode modification method comprises the following steps: step 1, pretreating a carbon fiber felt; 2, preparing a vanadium disulfide precursor solution; 3, compounding preparation of vanadium disulfide and carbon fiber felt; and step 4, post-processing. Vanadium disulfide is introduced into the carbon fiber felt serving as a battery electrode material, so that the conductivity and energy storage efficiency of the electrode are improved, more active sites can be provided for the electrode, and electron conduction of a whole battery system is quicker; impurity elements unfavorable for the battery do not need to be introduced, the introduced vanadium disulfide has good compatibility with vanadium ions, sulfate ions and hydrogen sulfate ions existing in the vanadium battery, the overall performance of the vanadium battery cannot be affected, and the convenience of follow-up electrolyte recycling can be improved.

Description

technical field [0001] The invention relates to the technical field of vanadium battery production, in particular to an electrode modification method for a vanadium battery. Background technique [0002] The electrode of the vanadium redox flow battery is the place for the charge and discharge reaction of the chemical energy storage system. As an important part of the vanadium battery, high-quality electrode materials are of great significance to the performance improvement of the entire system. Carbon-based materials are widely used in flow batteries due to their wide source, low cost and good conductivity, but they have exposed many problems during long-term use, such as high overpotential, poor wettability with electrolyte, There are few active sites, etc., and carbon materials can no longer meet the needs of the current vanadium batteries, so they need to be modified. The common modification treatment methods in the industry include material intrinsic treatment, metalli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/96
CPCH01M4/96H01M4/88Y02E60/50
Inventor 冯俊恺彭穗李德福文俊维
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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