All vanadium redox flow battery electrode assembly
An all-vanadium redox flow battery and electrode assembly technology, applied in battery electrodes, fuel cells, electrical components, etc., can solve the problem that the corrosion resistance and mechanical properties of current collectors are not well improved, and achieve low price, graphite filling and other problems. The effect of small amount and simple process
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preparation example Construction
[0017] According to the electrode assembly of the all-vanadium redox flow battery in the exemplary embodiment of the present invention, the preparation method of the carbon fiber felt of the carbon nanotubes arranged in order on the surface comprises:
[0018] 1) Cleaning and pretreatment of carbon fiber felt
[0019] The purpose of cleaning and pretreatment of carbon fiber felt is to remove impurities on the surface of carbon fiber felt. For example, the carbon fiber mat can be cleaned by ultrasonic acid solution cleaning. However, the present invention is not limited thereto, and other cleaning methods capable of removing impurities on the surface of the carbon fiber felt are also available. Preferably, the carbon fiber felt can be immersed in a mixed acid solution with a volume ratio of concentrated sulfuric acid and water of 1:4 to 1:2 and ultrasonically cleaned for 15 to 30 minutes, washed with distilled water for 3 to 5 times after taking it out, and then dried to obtai...
example 1
[0058] Prepare 100 mL of a mixed solution of acrylonitrile, acrylamide, dibenzoyl peroxide and ferrocene, including 95 mL of acrylonitrile, 1 mL of acrylamide, 4 g of dibenzoyl peroxide, and 5 g of ferrocene. Completely immerse the treated carbon fiber felt in the solution, heat and stir under the protection of nitrogen, stop heating when the temperature rises to 65°C, and react for 25 hours. After the reaction is over, take out the carbon fiber felt and put it in a drying oven to dry for later use.
[0059] The carbon fiber mat after the coating treatment was placed in a carbonization furnace, and pre-oxidized at a temperature of 220° C. for 100 minutes. Then, high-purity nitrogen gas was introduced to react at temperatures of 610°C, 640°C, 710°C, 740°C, and 800°C for 30 minutes respectively. After the reaction was completed, it was cooled to room temperature under a protective atmosphere of nitrogen.
[0060] Put the above-mentioned carbonized carbon fiber felt into a quar...
example 2
[0067] Prepare 100 mL of a mixed solution of acrylonitrile, acrylamide, azobisisoheptanonitrile and ferrocene, including 91 mL of acrylonitrile, 6 mL of acrylamide, 2 g of azobisisoheptanonitrile, and 4 g of ferrocene. Completely immerse the carbon fiber felt in the solution, heat and stir under the protection of nitrogen, stop heating when the temperature rises to 70°C, and react for 30 hours. After the reaction is over, take out the carbon fiber felt and put it into a drying oven for drying.
[0068]The carbon fiber mat after the coating treatment was placed in a carbonization furnace, and pre-oxidized at a temperature of 280° C. for 100 minutes. Then, high-purity nitrogen gas was introduced to react for 40 minutes at temperatures of 610°C, 650°C, 690°C, 740°C, and 810°C. After the reaction was completed, it was cooled to room temperature under a protective atmosphere of nitrogen.
[0069] Put the above-mentioned carbonized carbon fiber felt into a quartz tube, and after v...
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