▎ 摘　　要

NOVELTY - Lithium manganese oxide lithium nitride manganese oxygen complex (0.4Li2MnO3.0.6LiNi2/3Mn1/3O2/graphene composite material) with nano-crosslinked structure synthesized by using simple sol-gel method, where the particle size of Lithium manganese oxide lithium nitride manganese oxygen complex/graphene composite particles is 100-200 nm, and has nano-crosslinked structure with excellent conductivity and stability, is claimed. USE - The composite material with nano-crosslinked structure is useful in lithium-ion batteries (claimed). ADVANTAGE - The composite material: is rich in lithium source, which facilitates the diffusion of lithium ions during the cycle of lithium ion batteries; uses polyvinylpyrrolidone and acetate as carbon sources, which can enhance the overall conductivity of the material; is beneficial to alleviate the volume change caused by the insertion and extraction of lithium ions during the cycle; provides a shorter path for the conduction of electrons, which can continuously and quickly transfer electrons while overcoming the shortcomings of easy agglomeration of nanoparticles to improve rate performance and stability of lithium-ion batteries; and enhances the overall mechanical stability and conductivity of the composite material (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing lithium manganese oxide lithium nitride manganese oxygen complex/graphene composite material with nano-crosslinked structure comprising (a) adding 7 pts. wt. lithium acetate dihydrate, 2 pts. wt. nickel(II) acetate tetrahydrate, and 3 pts. wt. methoxyperoxide manganese tetrahydrate into the beaker, and then adding graphene, where the ratio of lithium manganese oxide lithium nitride manganese oxygen complex to graphene 1:0.1, (b) adding polyvinylpyrrolidone into the beaker as a regulator, finally mixing deionized water and ethanol in a volume ratio of 1:5, adding them to a beaker, and stirring for dissolving the solids into dark green, (c) adding the above solution at 70-90 degrees C and stirring until the volatile solution of ethanol and deionized water turns into a gel, and (d) heating the obtained gel from room temperature to 800 degrees C at a heating rate of not greater than 10 degrees C/minute under the protection of nitrogen, insulating for 6-10 hours, and finally lowering the temperature to room temperature to obtain a gray powder.