▎ 摘　　要

NOVELTY - A silver-containing graphene-manganese dioxide nano material preparation method involves adding graphene oxide into water and performing ultrasonic treatment to obtain a graphene oxide dispersion liquid, which is stirred with sodium humate and hydrazine hydrate and transferred into hydrothermal reaction kettle to perform reaction. The reacted product is filtered and washed to obtain graphene, which is dissolved in solution of silver nitrate and manganese sulfate, added potassium permanganate solution, and performed ultrasonic treatment. The resultant product is filtered, washed and dried. USE - Method for preparing silver-containing graphene-manganese dioxide nano material that is utilized in electrode. ADVANTAGE - The method enables preparing the silver-containing graphene-manganese dioxide nano material with increased active substance of the reaction area, improved efficiency, better effect of preventing agglomeration, improved electrical conductivity and reduced resistance of the electrode. DETAILED DESCRIPTION - A silver-containing graphene-manganese dioxide nano material preparation method involves adding graphene oxide into double distilled water and performing ultrasonic treatment at 200-800 W for 80-100 minutes to obtain a graphene oxide dispersion liquid. The graphene oxide is added with sodium humate and hydrazine hydrate, uniformly stirred and transferred into hydrothermal reaction kettle to perform reaction at 90-110 degrees C for 6-10 hours. The reacted product is filtered and washed with 100 ml of 70% ethanol for 2-3 times and distilled water to neutral to obtain graphene. The graphene is dissolved in solution of 5-10% silver nitrate and 0.02-0.1 wt.% manganese sulfate, added equal volume of potassium permanganate solution, and performed ultrasonic treatment at 500-1000 W for 10-20 minutes, followed by adding 0.1-0.3 pts. vol. potassium permanganate solution and performing ultrasonic treatment at 800-1200 W for 120-360 minutes. The resultant product is filtered, washed with 100 ml of 70% ethanol for 2-3 times and double distilled water until washing to neutral and dried under vacuum to obtain final product.