▎ 摘　　要

NOVELTY - Preparing graphene sheet supported nano nickel composition powder by microwave expansion, comprises e.g. placing nickel prepared into solution, adding polyethylene glycol 1000, continuously uniformly stirring after adding oxalic acid solution, performing precipitating reaction to generate single precursor solution, then using a constant pressure dropping funnel, zinc chloride solution and oxalic acid solution, slowly adding into a single precursor solution to produce coated salt precursor solution, taking crystalline flake graphite, and slowly adding into concentrated sulfuric acid. USE - The method is useful for preparing graphene sheet supported nano nickel composition powder by microwave expansion (claimed). ADVANTAGE - The method ensures a rich internal pore structure, where these pore structures facilitates the permeation of electrolyte and the diffusion of ions in electrochemical energy storage devices; and improves the ionic conductivity during the reaction. DETAILED DESCRIPTION - Preparing graphene sheet supported nano nickel composition powder by microwave expansion, comprises (i) placing 12-26 pts. wt. nickel prepared into solution with the concentration of 0.5 mol/l, adding 0.2-0.8 pts. wt. polyethylene glycol 1000, continuously uniformly stirring after adding 4-10 pts. wt. oxalic acid solution, performing precipitating reaction to generate single precursor solution, then using a constant pressure dropping funnel, 0.5 mol/l of 10-20 pts. wt. zinc chloride solution and 3-9 pts. wt. oxalic acid solution, slowly adding into a single precursor solution to produce coated salt precursor solution; (ii) taking 30-60 pts. wt. crystalline flake graphite, slowly adding into 140-230 pts. wt. concentrated sulfuric acid, under the stirring conditions, slowly adding 50-80 pts. wt. potassium permanganate, under the conditions of 30-40 degrees C in water bath temperature, intermittently stirring for 1-2 hours, using deionized water to wash until it is neutral, filtering, drying to obtain expandable graphite, expandable graphite and then drying in oven in expansion for 15-25 seconds, to obtain the expansion graphite; (iii) adding the precursor solution in the step (i) in the constant-pressure dropping funnel, where funnel remains closed and connected to suction flask filling with expanded graphite, vacuumizing the suction flask for 20-40 minutes, then opening the dropping funnel switch, lower the pressure induction, taking the solution in the dropping funnel into the expanded graphite layer; and (iv) taking the material of step (iii) into the expanded graphite precursor solution, placing into the reaction kettle, reducing atmosphere furnace and heating at 900- 1200 degrees C and sintering for 10-20 minutes, cooling to room temperature, to obtain zinc oxide/graphene-coated nickel powder composition, then using hydrochloric acid solution and soaking for 8-25 minutes, cleaning to remove zinc, using absolute ethanol, and repeatedly washing in de-ionized water, and carrying out vacuum drying.