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A negative electrode for an all-vanadium redox flow battery, its preparation method, and an all-vanadium redox flow battery

An all-vanadium redox flow battery and negative electrode technology, which is applied in battery electrodes, regenerative fuel cells, circuits, etc., can solve the problems of poor electrochemical activity and kinetic reversibility, etc., to weaken the hydrogen evolution side reaction, increase the binding rate, and broad The effect of market prospects

Active Publication Date: 2020-12-29
长沙和储新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Untreated carbon-based electrodes have poor electrochemical activity and kinetic reversibility for redox couples in all-vanadium redox flow batteries

Method used

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  • A negative electrode for an all-vanadium redox flow battery, its preparation method, and an all-vanadium redox flow battery
  • A negative electrode for an all-vanadium redox flow battery, its preparation method, and an all-vanadium redox flow battery
  • A negative electrode for an all-vanadium redox flow battery, its preparation method, and an all-vanadium redox flow battery

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A negative electrode for an all-vanadium redox flow battery, comprising a carbon electrode substrate and a catalyst loaded on the surface of the carbon electrode substrate, wherein the carbon electrode substrate is carbon felt, and its length, width and thickness are respectively cut to 15 mm, 10 mm and 10 mm. 1.5mm, the catalyst is bismuth-ethylenediaminetetraacetic acid complex.

[0044] The preparation method of the negative electrode for the all-vanadium redox flow battery of the present embodiment comprises the following steps:

[0045] (1) Activated carbon electrode substrate: Soak the carbon felt in 18mol / L sulfuric acid, heat it at 80°C for 5h, wash it with deionized water several times until the pH is 7.0, then dry it at 60°C for 12h, and finally transfer Put it in a vacuum drying oven, and then dry it at 80°C for 16 hours to obtain an activated carbon felt electrode, which is stored for future use;

[0046] (2) Dissolving the bismuth-ethylenediaminetetraaceti...

Embodiment 2

[0049] A negative electrode for an all-vanadium redox flow battery, comprising a carbon electrode substrate and a catalyst loaded on the surface of the carbon electrode substrate, wherein the carbon electrode substrate is carbon cloth, and its length, width and thickness are respectively cut to 16mm, 11mm and 0.3mm, the catalyst is bismuth-ethylenediaminetetraacetic acid complex.

[0050] The preparation method of the negative electrode for the all-vanadium redox flow battery of the present embodiment comprises the following steps:

[0051] (1) Activated carbon electrode substrate: Soak the carbon cloth in 16mol / L sulfuric acid, heat it at 70°C for 6h, wash it with deionized water several times until the pH is 7.0, then dry it at 60°C for 6h, and finally transfer Put it in a vacuum drying oven, and then dry it at 60°C for 12 hours to obtain an activated carbon cloth electrode, which is stored for future use;

[0052] (2) Dissolving the bismuth-EDTA complex in N,N-dimethylform...

Embodiment 3

[0057] A negative electrode for an all-vanadium redox flow battery, comprising a carbon electrode substrate and a catalyst loaded on the surface of the carbon electrode substrate, wherein the carbon electrode substrate is carbon felt, and its length, width and thickness are respectively cut to 60 mm, 50 mm and 6mm, the catalyst is bismuth-ethylenediaminetetraacetic acid complex.

[0058] The preparation method of the negative electrode for the all-vanadium redox flow battery of the present embodiment comprises the following steps:

[0059] (1) Activated carbon electrode substrate: Soak carbon felt in 18mol / L sulfuric acid, heat at 90°C for 4h, wash with deionized water several times to pH 6.5, then dry at 60°C for 24h, and finally transfer Put it in a vacuum drying oven, and then dry it at 80°C for 24 hours to obtain an activated carbon felt electrode, which is stored for future use;

[0060] (2) Dissolving the bismuth-ethylenediaminetetraacetic acid complex in N,N-dimethylfo...

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Abstract

The invention discloses a negative electrode for an all-vanadium redox flow battery. The negative electrode comprises a carbon electrode substrate and a catalyst supported on the surface of the carbonelectrode substrate, the catalyst comprises at least one metal-edetic acid complex, and metal comprises one or more of copper, nickel, iron, cobalt, vanadium, tin, bismuth, tungsten and molybdenum. The invention further correspondingly provides a preparing method of the negative electrode for the all-vanadium redox flow battery. The preparing method comprises the following steps of 1, activatingthe carbon electrode substrate; 2, dissolving the metal-edetic acid complex into an inorganic solvent to obtain a catalyst solution, then soaking the carbon electrode substrate activated in step 1 into the catalyst solution, and conducting ultrasonic supporting and drying on the carbon electrode substrate to obtain the negative electrode for the all-vanadium redox flow battery. The all-vanadium redox flow battery has a high electrochemical activity, good dynamic reversibility, and high stability.

Description

technical field [0001] The invention belongs to the field of liquid flow batteries, and in particular relates to an electrode for an all-vanadium redox flow battery, a preparation method thereof, and an all-vanadium redox flow battery. Background technique [0002] At present, all countries in the world are facing the serious problem of energy shortage, and at the same time, the environmental pollution caused by the excessive use of fossil energy needs to be solved urgently. Therefore, vigorously developing renewable energy such as wind energy, solar energy, and tidal energy and increasing their proportion in energy consumption has become an inevitable choice for human survival and social development and progress. However, renewable energy power generation has the disadvantages of instability and discontinuity, and cannot meet the standards for direct grid connection. In order to use renewable energy more stably, an effective and unified solution is to introduce large-scale ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M8/18
CPCH01M4/86H01M4/88H01M4/9008H01M8/18Y02E60/50
Inventor 刘素琴刘炳君袁修贵
Owner 长沙和储新材料科技有限公司
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