▎ 摘　　要

NOVELTY - A graphene/molybdenum carbide composite cathode material preparing method involves dissolving ammonium heptamolybdate tetrahydrate in deionized water, performing ultrasonic dispersion by adding urea and stirring to obtain mixed solution-I, followed by dissolving graphene oxide in deionized water and performing ultrasonic dispersion to obtain mixed solution-II. The mixed solution-I is stirred with mixed solution-II to react to obtain reacted product. The reacted product is centrifuged and freeze-dried too obtain freeze-dry powder. The freeze-dry powder is sintered to obtain a finished product. USE - Method for preparing graphene/molybdenum carbide composite cathode material. ADVANTAGE - The method enables preparing the graphene/molybdenum carbide composite cathode material with prolonged service life, and better avoidance of separation and falling of the electrode active material caused by volume expansion and shrinkage of the electrode active material in charging and discharging processes. DETAILED DESCRIPTION - A graphene/molybdenum carbide composite cathode material preparing method involves dissolving 0.1-0.4 mmol ammonium heptamolybdate tetrahydrate in 20-60 ml deionized water, performing ultrasonic dispersion for 0.2-1 hours by adding 2-10 mmol urea and stirring for 0.5-2 hours to obtain mixed solution-I, followed by dissolving 50-200 mg graphene oxide in 20-70 ml deionized water and performing ultrasonic dispersion for 0.5-3 hours to obtain mixed solution-II. The mixed solution-I is stirred with mixed solution-II to react at 50-90 degrees C for 8-12 hours to obtain reacted product. The reacted product is centrifuged and freeze-dried too obtain freeze-dry powder. The freeze-dry powder is sintered at 700-900 degrees C by introducing argon gas and hydrogen in high temperature atmosphere furnace for 0.5-2 hours to obtain a finished product.