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Preparation method of all-vanadium redox battery electrode material

A battery electrode, vanadium oxidation technology, applied in battery electrodes, vanadium oxide, fuel cells and other directions, can solve the problems of poor electrochemical performance, restrict large-scale commercial application, etc., achieve good electrical conductivity, enhance electrochemical performance, good Hydrophilic effect

Active Publication Date: 2021-06-04
林源电力(南京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Polyacrylonitrile carbon felt is currently the most commonly used electrode material in all-vanadium redox flow batteries. The electrochemical performance restricts its large-scale commercial application

Method used

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  • Preparation method of all-vanadium redox battery electrode material
  • Preparation method of all-vanadium redox battery electrode material

Examples

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Embodiment 1

[0020] A preparation method of an all-vanadium redox battery electrode material, specifically comprising the following steps:

[0021] S1: Add polyacrylonitrile to N,N-dimethylformamide, ultrasonically dissolve, and then stir bismuth trioxide at room temperature for 1 hour, in which polyacrylonitrile, N,N-dimethylformamide and trioxide The mass volume ratio of bismuth is 4.4g:12mL:1.22g, then the mixed solution is moved into the electrospinning syringe pump, and the electrospinning is carried out under the conditions that the injection distance is 12cm, the injection rate is 3.6kV, and the injection voltage is 23kV. Filament, a polyacrylonitrile nanofiber film was obtained on a take-up roll.

[0022] S2: Add tetraethyl orthosilicate to absolute ethanol, wherein the volume ratio of tetraethyl orthosilicate and ethanol is 1.2:6, stir and dissolve at room temperature to obtain solution I; add phosphoric acid to deionized water , wherein the mass volume ratio of phosphoric acid a...

Embodiment 2

[0026] A preparation method of an all-vanadium redox battery electrode material, specifically comprising the following steps:

[0027] S1: Add polyacrylonitrile to N,N-dimethylformamide, ultrasonically dissolve, and then stir tungsten trioxide at room temperature for 2 hours, in which polyacrylonitrile, N,N-dimethylformamide and tungsten trioxide The mass volume ratio is 5.7g: 20mL: 2.39g, then the mixed solution is moved into the electrospinning syringe pump, and the electrospinning is carried out under the conditions that the injection distance is 16cm, the injection rate is 3.8kV, and the injection voltage is 26kV. A film of polyacrylonitrile nanofibers was obtained on a take-up roll.

[0028] S2: Add tetraethyl orthosilicate to absolute ethanol, wherein the volume ratio of tetraethyl orthosilicate and ethanol is 1.8:10, stir and dissolve at room temperature to obtain solution I; add phosphoric acid to deionized water , wherein the mass volume ratio of phosphoric acid and ...

Embodiment 3

[0032] A preparation method of an all-vanadium redox battery electrode material, specifically comprising the following steps:

[0033] S1: Add polyacrylonitrile to N,N-dimethylformamide, ultrasonically dissolve, and then stir cerium oxide at room temperature for 1.5h, in which polyacrylonitrile, N,N-dimethylformamide and cerium oxide The mass volume ratio is 4.8g: 15mL: 1.55g, then the mixed solution is moved into the electrospinning syringe pump, and the electrospinning is carried out under the conditions that the injection distance is 14cm, the injection rate is 3.7kV, and the injection voltage is 24kV. A film of polyacrylonitrile nanofibers was obtained on a take-up roll.

[0034] S2: Add tetraethyl orthosilicate to absolute ethanol, wherein the volume ratio of tetraethyl orthosilicate and ethanol is 1.5:8, stir and dissolve at room temperature to obtain solution I; add phosphoric acid to deionized water , wherein the mass volume ratio of phosphoric acid and deionized wate...

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Abstract

The invention discloses a preparation method of an all-vanadium redox battery electrode material. The preparation method comprises the following steps: adding polyacrylonitrile into N, N-dimethylformamide, carrying out ultrasonic dissolution, stirring at room temperature, transferring the mixed solution into an electrostatic spinning injection pump, and carrying out electrostatic spinning under certain conditions to obtain a polyacrylonitrile nanofiber membrane; adding tetraethyl orthosilicate into absolute ethyl alcohol, and stirring and dissolving at room temperature to obtain a solution I; adding phosphoric acid into deionized water, stirring and dissolving to obtain a solution II, and mixing the two solutions to obtain silicon dioxide sol; shearing the polyacrylonitrile nanofiber membrane into small blocks, then adding the small blocks into the silicon dioxide sol, violently stirring, pouring into a mold, and freeze-drying with liquid nitrogen to obtain metal oxide nanofiber aerogel; and placing the blocky metal oxide nanofiber aerogel in a tubular furnace, introducing nitrogen / carbon monoxide mixed gas, calcining and carbonizing, cooling, washing with deionized water for 3 times, and drying to obtain the electrode material.

Description

technical field [0001] The invention belongs to the technical field of electrode materials for all-vanadium redox batteries, and in particular relates to a preparation method of electrode materials for all-vanadium redox batteries. Background technique [0002] All-vanadium redox flow battery (VRFB) undergoes reversible redox reaction through positive and negative electrolytic active materials, thereby realizing the conversion of electrical energy and chemical energy. It has the advantages of independent battery power and capacity, long life and high reliability. The active material in the electrolyte solution of the all-vanadium redox flow battery is composed of vanadium in various valence states, and vanadium ions in different valence states undergo redox reactions on the electrode surface to realize the mutual conversion of electrical energy and chemical energy, and complete the storage and release of electrical energy. The response is as follows: [0003] positive elect...

Claims

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Application Information

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IPC IPC(8): C01G31/02H01M4/96H01M8/18
CPCC01G31/02H01M4/96H01M8/188C01P2004/03C01P2006/40Y02E60/50
Inventor 付武祥
Owner 林源电力(南京)有限公司
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