▎ 摘　　要

NOVELTY - High-performance lithium ion battery cathode material comprises graphene and transition metal oxide copper oxide attached to the surface of the graphene. The graphene is a hierarchical structure of a three-dimensional grid, and is used as a supporting framework of the copper oxide active component. The copper oxide is grown on the graphene surface through solvent thermal method, and the copper oxides are composed of compact micro-nano sheets to construct a 3D hierarchical porous microsphere structure. The flower shape or sea urchin shape is presented. USE - High performance lithium ion battery cathode material. ADVANTAGE - The high performance lithium ion battery cathode material has controllable shape. It has stable structure, not easy to agglomerate, large specific surface area, and good processing performance. It can obviously improve the contact material and the electrolyte, increase the electrode reaction place, increasing the transmission rate of the lithium ion, improving the coulomb efficiency and multiplying power performance of the cathode. It uses urea as alkali source, which can better shape control. It adopts solvent thermal method to control the preparation condition to obtain the copper oxide active material, presenting the compact micro-nano sheet to construct three-dimensional hierarchical porous microsphere structure, presenting flower shape or sea urchin shape using the control of the solvent thermal reaction condition to realize the shape control, and the crystal shape finally obtained in the further