▎ 摘　　要

NOVELTY - Manganese sulfate, nickel sulfate, and ammonium persulfate are dissolved in water to obtain a mixed solution. Graphene is dissolved in water. The mixed solution and graphene solution are mixed. Lithium hydroxide is dissolved in water to obtain a homogeneous solution. The graphene mixed solution is mixed with lithium hydroxide solution to obtain a precursor mixture. The precursor is added to hot water, hydrothermally reacted, cooled, filtered, dried, and ground to obtain a graphene-loaded lithium-rich anode material containing lithium-manganese-nickel oxide. USE - Preparation of graphene-loaded lithium-rich anode material (claimed). ADVANTAGE - The method enables simple, environmentally-friendly and economical large-scale production of graphene-loaded lithium-rich anode material under easy-to-control conditions, with excellent reproducibility. The obtained anode material has small grain diameter and excellent electrochemical performance characteristics. DETAILED DESCRIPTION - Manganese sulfate, nickel sulfate, and ammonium persulfate are dissolved in deionized water such that the manganese ion concentration is 0.1-0.5 mol/L, nickel ion concentration is 0.1-0.2 mol/L, and ammonium ion concentration is 0.1-1 mol/L, and seal-stirred at room temperature for 30-60 minutes to obtain a mixed solution. Graphene is dissolved in deionized water to obtain a homogeneous solution with a concentration of 1-3 g/L, sealed, and ultrasonically processed for 2 hours at room temperature. The mixed solution and graphene solution are mixed in a volume ratio of 1:1, sealed, and stirred at room temperature for 30-60 minutes. Lithium hydroxide is dissolved in deionized water to obtain a homogeneous solution with a concentration of 1-5 mol/L. The graphene mixed solution is mixed with lithium hydroxide solution in a volume ratio of 1:2, sealed, and stirred at room temperature for 1-2 hours to obtain a precursor mixture. The precursor is added to hot water in a reactor, hydrothermally reacted at 180-220 degrees C for 10-24 hours, cooled, filtered, dried at 80-100 degrees C for 6 hours, and ground to obtain a graphene-loaded lithium-rich anode material containing lithium-manganese-nickel complex oxide of formula: Li1.2Mn0.6Ni0.2O2.