▎ 摘　　要

NOVELTY - A graphene-diselenium vanadium oxide nano-particle super capacitor composite electrode material preparing method involves dissolving selenium powder to obtain a selenium solution, dispersing graphene and a vanadium source in 50 ml water, and stirring the dispersed material at 120 degrees C for 20 minutes under heating condition to obtain a treated mixture. The treated mixture is stirred and mixed with the selenium solution uniformly. The resultant solution is added into a reaction kettle to perform hydrothermal reaction and cooled to room temperature, followed by performing centrifugal washing process and drying to obtain the finished product. USE - Method for preparing a graphene-diselenium vanadium oxide nano-particle super capacitor composite electrode material. ADVANTAGE - The method enables preparing the graphene-diselenium vanadium oxide nano-particle super capacitor composite electrode material with high specific capacitance, high electrochemical stability, long cycle life, better chemical property and wide application range, in a simple, energy-saving, eco-friendly and cost-effective manner.