▎ 摘　　要

NOVELTY - A graphene coated nickel sulfide electrode structure preparing method involves adding sodium hydroxide solution with sulfur and sodium sulfide nonahydrate in water bath to form solution, and stirring the solution with graphene dispersion liquid and diluted hydrochloric acid to separate out precipitate. The precipitate is filtered to obtain graphene coated sulfur granule. The nickel is immersed in diluted hydrochloric acid for future use followed by placing granule and foamed nickel in a reaction kettle with deionized water for hydrothermal reaction and cooling to obtain a finished product. USE - Method for preparing a graphene coated nickel sulfide electrode structure. ADVANTAGE - The method enables preparing the electrode structure with rapid charging and discharging property. DETAILED DESCRIPTION - A graphene coated nickel sulfide electrode structure preparing method involves adding 10% sodium hydroxide solution with 0.25 g sulfur and 0.65 g sodium sulfide nonahydrate in 50 ml water bath at 60-80 degrees C until to form orange-yellow transparent solution, stirring the transparent solution with 5-20 ml graphene dispersion liquid in a magnetic stirrer for 1 hours to obtain a solution, and stirring the 72 ml solution with 5% diluted hydrochloric acid with regulated pH of 2 in a magnetic stirrer to separate out white precipitate. The precipitate is filtered to obtain graphene coated sulfur suspension granule and dried under air at 70 degrees C for 24 hours. The commercial foamed nickel with diameter of 18 mm is immersed in 2 mol/l diluted hydrochloric acid for 15 minutes, alcohol for 10 minutes and deionized water for 10 minutes for future use followed by placing 40 mg sulfur graphene coated granule and foamed nickel in 10 ml PTFE lined reaction kettle with 40 ml deionized water for hydrothermal reaction at 180 degrees C for 4 hours and cooling to obtain three-dimensional folded graphene coated nickel sulfide electrode structure, flushing the electrode structure with alcohol and water, soaking the electrode structure with 0.048% hydrazine hydrate aqueous solution for 3 hours and drying under at 70 degrees C for 24 hours to obtain finished product.