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A kind of three-phase composite electrode of vanadium battery and preparation method thereof

A composite electrode and vanadium battery technology, applied in the electrode field, can solve problems such as graphite plate etching, battery leakage, and vanadium battery safety hazards, and achieve the effects of improving reversibility, improving stability, and avoiding etching phenomena

Active Publication Date: 2017-10-20
HUNAN YINFENG NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The electrodes of vanadium batteries in the prior art are all made of graphite, but the graphite plate on the positive side is etched, which can easily cause battery leakage accidents, resulting in serious safety hazards in the use of vanadium batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0029] Weigh 1g of potassium persulfate and 1.5g of phosphorus pentoxide, dissolve them in concentrated sulfuric acid, add 5g of graphite, react at 80°C for 5h, cool to room temperature, filter, and dry to obtain solid A. A was mixed with 10 mL of 90% concentrated sulfuric acid, and 29.25 g of potassium permanganate was added at 5 °C. After 3 h of reaction, 2 mL of hydrogen peroxide was added to obtain a yellow precipitate, which was filtered and dried. Weigh 2g of p-aminobenzenesulfonic acid and dissolve it in 15mL of sodium hydroxide solution with a mass fraction of 2%. Under the condition of 0 ℃, add sub-aminobenzenesulfonic acid: the mass ratio of sodium nitrite is 2:1. Sodium nitrate, hydrochloric acid was added dropwise to the solution according to the molar ratio of p-aminobenzenesulfonic acid: hydrochloric acid 20:1 to obtain a white precipitate, which was filtered and dried. The obtained yellow precipitate was mixed with NaBH 4 Mix evenly at a molar ratio of 1:1.5 an...

Embodiment 3

[0034] Weigh 1 g of potassium persulfate and 1.5 g of phosphorus pentoxide, dissolve them in concentrated sulfuric acid, add 5 g of graphite, react at 80 ° C for 4.3 h, cool to room temperature, filter, and dry to obtain solid A. Solid A was mixed with 10 mL of 90% concentrated sulfuric acid, and 29.25 g of potassium permanganate was added at 2.7 °C. After 2.5 h of reaction, 2 mL of hydrogen peroxide was added to obtain a yellow precipitate, which was filtered and dried. Weigh 2g of p-aminobenzenesulfonic acid and dissolve it in 15mL of sodium hydroxide solution with a mass fraction of 2%. Under the condition of 0 ℃, add sub-aminobenzenesulfonic acid: the mass ratio of sodium nitrite is 2:1. Sodium nitrate, hydrochloric acid was added dropwise to the solution according to the molar ratio of p-aminobenzenesulfonic acid: hydrochloric acid 20:1 to obtain a white precipitate, which was filtered and dried. The obtained yellow precipitate was mixed with NaBH 4 Mix uniformly at a mo...

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Abstract

The invention discloses a three phase combination electrode, and belongs to the field of electrode. The three phase combination electrode is composed of sulfonated graphene, manganese dioxide, and manganese dioxide / poly(3,4-ethylenedioxythiophene)-polystyrolsulfon acid. The three phase combination electrode is capable of weakening etching of graphite electrodes, prolonging service life of vanadium cells, and improving application safety of vanadium cells.

Description

technical field [0001] The present invention relates to an electrode, in particular to a three-phase composite electrode. Background technique [0002] Vanadium redox flow battery is a new type of electrochemical energy storage device, which consists of battery stack, positive and negative electrolyte storage tanks and other auxiliary control devices. In addition to the characteristics of ordinary redox flow batteries, vanadium batteries use vanadium ion solutions of different valences as the positive and negative active materials of the battery, which eliminates battery failure caused by cross-contamination of electrolytes; vanadium batteries are used in production and use. Basically no substances harmful to human body and the environment are produced in the process; at the same time, vanadium battery is an excellent energy storage system due to its low price, high energy efficiency, long service life, high reliability and low operation and maintenance costs. my country is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88H01M8/18
CPCH01M4/8657H01M4/88H01M8/18Y02E60/50
Inventor 肖勇
Owner HUNAN YINFENG NEW ENERGY CO LTD
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