▎ 摘　　要

NOVELTY - A graphene-supported positive electrode material comprises 24-28 pts. wt. anhydrous zinc chloride, 25-30 pts. wt. cobalt nitrate hexahydrate, 20-25 pts. wt. manganese chloride tetrahydrate, 5-7 pts. wt. citric acid, 5-24 pts. wt. graphene, 1.5-4 pts. wt. silane coupling agent and 0.5-1 pt. wt. dispersant. The positive electrode material is prepared using ethylene glycol, distilled water, absolute ethanol and dilute hydrochloric acid. USE - Graphene-supported positive electrode material for zinc ion batteries. ADVANTAGE - The acidic cobalt-manganese oxide has excellent electrical conductivity and low charge transfer resistance. The electrons can move and transport between positive electrode material and electrolyte quickly and efficiently and acidic cobalt manganese oxide has an octahedral equiaxed crystal system configuration. The fingerprint-like inclusions formed by tensile cracks on surface make it have strong chemical stability and excellent structural elasticity, thereby avoiding manganese acid oxides during battery charging and discharging process and avoiding structure collapse due to expansion of structure, which causes electrode material matrix to lose its electrochemical properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of positive electrode material, which involves adding 300 mL ethylene glycol and 200 mL distilled water to 1000 mL beaker, adding anhydrous zinc chloride, cobalt nitrate hexahydrate, manganese chloride tetrahydrate and citric acid into beaker, stirring, transferring solution in beaker into high pressure hydrothermal automatic reactor, setting temperature to 150-160 degrees C, magnetically stirring at 1000-1200 rpm and reacting for 15-18 hours, cooling reaction kettle to room temperature, filtering material in reaction kettle using suction to obtain metal oxide precursor, washing metal oxide precursor with 2000-3000 mL distilled water, calcining in muffle furnace at heating rate of 10 degrees C/minute and raising temperature to 250-270 degrees C, maintaining temperature for 4-5 hours, cooling to room temperature, sequentially washing obtained metal oxide with 200-300 mL dilute hydrochloric acid solution having concentration of 2.3-3.5 mol/L and 3000-4000 mL distilled water, placing in an oven and heating to 85-90 degrees C, drying for 6-8 hours and obtaining metal oxide of formula: ZnMn1.2-1.65Co0.35-0.8O4, adding 600 mL absolute ethanol and metal oxide to planetary ball mill beaker, ball milling at revolution speed of 270-280rpm and rotation speed of 560-580 rpm for 12-18 hours until all materials pass through 2000 mesh sieve, transferring absolute ethanol and ball-milled metal oxide into 1000 mL beaker, adding graphene, silane coupling agent and dispersant to beaker, placing beaker in sonicator and heating to 50-55 degrees C with an ultrasonic frequency of 28 kHz, ultrasonically dispersing for 24-28 hours, filtering material in beaker to remove ethanol to obtain brown solid product, washing solid with 3000-5000 mL distilled water, placing in an oven and heating to 90-95 degrees C for 6-8 hours.