▎ 摘　　要

NOVELTY - A flocculent manganese dioxide/graphene composite electrode material preparing method involves depositing a collector material in a vacuum plasma enhanced chemical vapor deposition apparatus to obtain a deposition of graphene collector material. The graphene material is chosen as a working electrode, a platinum sheet as a counter electrode and a saturated calomel electrode as a reference electrode. The collector material is rinsed with deionized water and dried to obtain flocculent manganese dioxide/graphene composite electrode material. USE - Method for preparing flocculent manganese dioxide/graphene composite electrode material. ADVANTAGE - The method enables increasing ratio of capacitance value. DETAILED DESCRIPTION - A graphene composite electrode material preparing method involves depositing a collector material in a vacuum plasma enhanced chemical vapor deposition apparatus at a temperature of 300-800 degrees C and a pressure of 200-900 Pa, radiofrequency power of 75-225W, argon gas flow rate of 40-120 sccm, for 5-60 minutes, to obtain a deposition of graphene collector material. The graphene material is chosen as a working electrode, a platinum sheet as a counter electrode and a saturated calomel electrode as a reference electrode. The deposited material graphene collector working electrode, a platinum sheet counter electrode and a saturated calomel electrode reference electrode are put into an electrolyte, where an operating voltage range is -0.3 to 0.3 V, voltage scan rate is 2-500 mV/s and number of cyclic voltammetry is 5-100 times to obtain a cyclic voltammogram. The electrolytic solution comprises 0.01-1 mol/l acetic acid aqueous solution of manganese. The collector material is rinsed with deionized water and dried at a temperature of 100-300 degrees C to obtain flocculent manganese dioxide/graphene composite electrode material.