Electrode materials and all-vanadium redox flow battery containing electrode materials

An all-vanadium redox flow battery and electrode material technology, which is applied in the direction of regenerative fuel cells, electrode manufacturing, battery electrodes, etc., can solve the problems of battery performance degradation, increase the difficulty of battery assembly, and affect the service life of electrode batteries, etc.

Inactive Publication Date: 2010-02-17
BIG PAWER ELECTRICAL TECH XIANGYANG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above treatment method improves the electrochemical activity of the carbon electrode, the mechanical strength of the material decreases significantly.
This increases the difficulty of battery assembly. During battery charging and discha

Method used

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  • Electrode materials and all-vanadium redox flow battery containing electrode materials
  • Electrode materials and all-vanadium redox flow battery containing electrode materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Carbon cloth was mixed with 6mol / L HNO at a volume ratio of 1:1 3 and 3mol / L of H 2 SO 4 After soaking in mixed acid for 10min, in 0.1mol / L Fe(NO 3 ) 3 Soak in xylene solution for 12 hours, take it out, and dry it at room temperature.

[0027] The above-mentioned dry carbon is arranged in the high-temperature reaction furnace that 2.5g ferrocene catalyst is placed in the furnace mouth, 2 Under gas protection, the reaction furnace was heated up. When the temperature in the furnace rises to 750°C, the C 2 h 2 gas while controlling C 2 h 2 / N 2 The flow ratio is 5.0. After reacting for 10min, close the C 2 h 2 . in N 2 The reaction furnace was cooled to room temperature under gas protection, and N was controlled during the cooling process. 2 The gas flow is 50 sccm, and the carbon cloth that can be used for the electrode of the all-vanadium redox flow battery is obtained with carbon nanotubes deposited on the surface.

Embodiment 2

[0029] The carbon felt was mixed with 6 mol / L HNO at a volume ratio of 1:1 3 and 3mol / L of H 2 SO 4 After soaking in mixed acid for 80min, in 5.2mol / L Fe(NO 3 ) 3 Soak in xylene solution for 12 hours, take it out, and dry it at room temperature.

[0030] The above-mentioned dry carbon is arranged in the high-temperature reaction furnace that 2.5g ferrocene catalyst is placed in the furnace mouth, 2 Under gas protection, the reaction furnace was heated up. When the temperature in the furnace rises to 750°C, the C 2 h 2 gas while controlling C 2 h 2 / N 2 The flow ratio is 0.5. After reacting for 120min, close the C 2 h 2 . in N 2 The reaction furnace was cooled to room temperature under gas protection, and N was controlled during the cooling process. 2 The gas flow is 50 sccm, and the carbon felt that can be used for the electrode of the all-vanadium redox flow battery is obtained with carbon nanotubes deposited on the surface.

Embodiment 3

[0032] The graphite felt was mixed with 6 mol / L HNO at a volume ratio of 1:1 3 and 3mol / L of H 2 SO 4 After soaking in mixed acid for 50min, in 2.5mol / L Fe(NO 3 ) 3 Soak in xylene solution for 12 hours, take it out, and dry it at room temperature.

[0033] The above-mentioned dry carbon is arranged in the high-temperature reaction furnace that 2.5g ferrocene catalyst is placed in the furnace mouth, 2 Under gas protection, the reaction furnace was heated up. When the temperature in the furnace rises to 750°C, the C 2 h 2 gas while controlling C 2 h 2 / N 2 The flow ratio is 2.5. After reacting for 60min, close the C 2 h 2 . in N 2 The reaction furnace was cooled to room temperature under gas protection, and the N2 gas flow was controlled to be 50 sccm during the cooling process, so as to obtain a graphite felt with carbon nanotubes deposited on the surface that can be used for the electrode of an all-vanadium redox flow battery.

[0034] figure 1 Comparison of cy...

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Abstract

The invention provides an electrode for a vanadium battery, comprising a carbon basal body and a carbon nano-tube layer formed on the surface of the basal body, wherein the carbon basal body is selected from a graphite felt, a carbon felt, a carbon paper and carbon cloth. The invention also provides an all-vanadium redox flow battery containing the electrode. The electrode has improved electrochemical activity and reliable mechanical strength.

Description

technical field [0001] The invention relates to the field of liquid flow batteries, and more specifically relates to an electrode material for an all-vanadium battery. Background technique [0002] Electrodes for all-vanadium redox flow batteries include surface active materials (hereinafter referred to as electrode materials), which are combined with current collectors. The function of current collectors is to collect electrons and transmit current. Surface active materials provide vanadium ions with different valence states for gaining and losing electrons, that is, places where electrochemical oxidation / reduction reactions occur. Therefore, the properties of surface active materials have a significant impact on the electrochemical performance of electrodes and even the entire battery. [0003] At present, the electrode materials used for vanadium batteries mainly include metal electrodes, composite conductive plastic electrodes and carbon electrodes. Metal electrodes are ...

Claims

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Application Information

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IPC IPC(8): H01M4/02H01M4/62H01M8/18H01M10/36H01M4/04
CPCY02E60/12Y02E60/528Y02E60/10Y02E60/50
Inventor 刘素琴黄可龙张庆华陈若媛史晓虎李虹云黄斌仲晓玲刘维维
Owner BIG PAWER ELECTRICAL TECH XIANGYANG
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