▎ 摘　　要

NOVELTY - The method involves preparing a graphene hydro-gel sheet with pyrene derivative solution. A graphene sheet self-assembly is made by using a hydro-thermal process to obtain the graphene hydro-gel. Graphene foam of a graphene hydro-gel freezing drying unit is prepared. Organic lithium salt, organic metal salt, organic phosphate and phosphoric acid are obtained and dissolved in water. A graphene oxide is added with a citric acid at 40-80 degree centigrade. A phosphate-graphene gel precursor is obtained. The graphene foam is formed into phosphate precursor organic solution. USE - Phosphate-graphene foam anode material preparation method. ADVANTAGE - The method enables achieving simple process, low cost and full use of graphene foam as phosphate cathode material for chemical synthesis reactor and the load of the substrate, preparing cathode material with better cycling performance and high rate capability and ensuring better electrochemical performance, safety and reliability to form a better lithium ion battery with secondary potential of a positive electrode. DESCRIPTION OF DRAWING(S) - The drawing shows a photograph of a phosphate-graphene foam anode material.