Vanadium Redox Battery is a new type of energy storage battery system with no pollution and long service life. Its electrode material plays a role in providing reaction site and output current in vanadium battery. Therefore, the electrode material is required to have a certain relative area and conductivity. With the in-depth study of vanadium battery, carbon fiber felt is a material to meet the requirements of vanadium battery electrode. However, the carbon fiber felt on the market has the disadvantages of low reaction activity and poor reversibility in the application of vanadium battery because there is no electrode specially prepared for the characteristics of vanadium battery. Therefore, it is necessary to modify it before use to improve the activity of electrode materials.

Specifically, the preparation method of electrode for Vanadium Redox Battery is as follows:

A. Mix carbonate with organic solvent, add acrylonitrile, acrylamide and water after ultrasonic treatment, stir evenly, take out 1 / 3-1 / 2 volume of mixed liquid, heat the remaining mixed liquid under stirring and nitrogen protection, then add initiator solution, and then add the taken out mixed liquid for reaction. After the reaction, the functional polyacrylonitrile mother liquor containing carbonate is obtained;

B. Mixing the functional polyacrylonitrile mother liquor containing carbonate with polyacrylonitrile stock liquor to obtain polyacrylonitrile solution for vanadium battery;

C. The polyacrylonitrile felt was woven from polyacrylonitrile solution for vanadium battery, pre oxidized, and then reacted under the protection of nitrogen. After the reaction is completed, the vanadium battery electrode is cooled.