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A kind of modification method of carbon felt for all-vanadium redox flow battery electrodes

An all-vanadium redox flow battery and carbon felt technology, applied in battery electrodes, fuel cells, regenerative fuel cells, etc., can solve the problems of high cost, complicated operation, insignificant modification effect, etc., and achieve performance improvement, safety and stable cost. Effect

Active Publication Date: 2021-02-02
大连融科储能装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in large-scale applications, there are problems such as complicated operation, inconspicuous modification effect, and high cost.

Method used

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  • A kind of modification method of carbon felt for all-vanadium redox flow battery electrodes
  • A kind of modification method of carbon felt for all-vanadium redox flow battery electrodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The 3mm thick carbon felt that has not been activated into a roll is put into the uncoiler assembly line, and then sent to the activation zone by the roller drive, and the plasma spray gun is used to purge the carbon felt to activate the carbon felt, and the activation zone is at room temperature. Set the plasma output power to 3500w, the ratio of air to nitrogen flow rate to 9:1, the total flow rate to 20ml / min, the surface of the nozzle and carbon felt to 1cm, and the speed of the nozzle to 20cm / s.

Embodiment 2

[0023] The 5mm thick carbon felt that has not been activated into a roll is put into the uncoiler assembly line, and then sent to the activation zone by the roller drive, and the plasma spray gun is used to purge the carbon felt to activate the carbon felt, and the activation zone is at room temperature. Set the plasma output power to 5000w, the flow rate ratio of oxygen and nitrogen to 1:1, the total flow rate to 50ml / min, the surface of the nozzle and the carbon felt to be 5cm, and the speed of the nozzle to be 50cm / s.

Embodiment 3

[0025] The 7mm thick carbon felt that has not been activated into a roll is put into the uncoiler assembly line, and then sent to the activation area by the roller drive, and the plasma spray gun is used to purge the carbon felt to activate the carbon felt, and the activation area is at room temperature. Set the plasma output power to 8000w, the air flow rate to 100ml / min, the surface of the nozzle and the carbon felt to 8cm, and the speed of the nozzle to 30cm / s.

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Abstract

The invention relates to the field of energy storage batteries, in particular to a method for modifying a carbon felt for an all-vanadium redox flow battery electrode. The plasma spray gun is used to process the surface of the rolled carbon felt in an assembly line, which greatly reduces the complexity of the operation and significantly improves the hydrophilicity and chemical stability of the carbon felt electrode. The invention realizes fully automatic production, the performance of the carbon felt after activation is relatively stable without obvious fluctuation, no manual operation and real-time supervision are required, the safety and stability are low, and the production rate is greatly increased, which obviously simplifies the production process.

Description

technical field [0001] The invention relates to the field of energy storage batteries, in particular to the field of all-vanadium redox flow batteries, in particular to a modification method specially used for electrode carbon felts of all-vanadium redox flow batteries. Background technique [0002] All-vanadium redox flow battery is a new type of large-scale energy storage battery, which has the advantages of independent capacity, high power, long life and easy operation. The electrode is one of the key components of the flow battery. The performance of the electrode material directly affects the uniformity of the electrolyte distribution, the diffusion state, the internal resistance of the battery, and the rate of the electrochemical reaction, which in turn affects the degree of polarization of the electrode and the performance of the battery. The internal resistance ultimately affects the energy conversion efficiency of the battery, and the stability of the electrode mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/96H01M8/18
CPCH01M4/88H01M4/96H01M8/188Y02E60/50
Inventor 盛伟张华民马相坤霍洋刘盛林倪泓高涛南明君徐广民
Owner 大连融科储能装备有限公司