▎ 摘　　要

NOVELTY - Preparation of graphene aerogel-supported lithium iron phosphate porous composite material, involves (i) adding graphene oxide to deionized water stirring to obtain solution (I), (ii) adding iron salt to the solution (I), stirring to obtain solution (II), sequentially adding phosphate and lithium salt to the solution (II), stirring to obtain solution (III), (iv) carrying out hydrothermal reaction on the solution (III), washing the product with distilled water, freezing, drying, (v) placing the dried product in a tube furnace, maintaining under the protective atmosphere and cooling. USE - Preparation of graphene aerogel-supported lithium iron phosphate porous composite material (claimed). ADVANTAGE - The graphene aerogel-supported lithium iron phosphate porous composite material is prepared conveniently and easily. The pore structure and particle size of the prepared graphene aerogel-supported lithium iron phosphate porous composite material can be controlled. The graphene aerogel-supported lithium iron phosphate porous composite material has excellent structural stability, cycle performance and high rate performance. DETAILED DESCRIPTION - Preparation of graphene aerogel-supported lithium iron phosphate porous composite material, involves (i) adding graphene oxide to deionized water according to the concentration of the graphene oxide aqueous solution to 2-5 kg/m3, stirring for 1-2 hours to obtain solution (I), (ii) adding iron salt to the solution (I) according to the weight ratio of iron salt and graphene oxide to 1 0.03-0.3, stirring for 0.5-1 hour to obtain solution (II), sequentially adding phosphate and lithium salt to the solution (II) according to the weight ratio of iron salt, phosphate and lithium salt is 1:1:2, stirring for 1-2 hours to obtain solution (III), (iv) transferring the solution (III) to a reactor, and carrying out hydrothermal reaction at 175-185 degrees C for 11.5-12.5 hours, washing the product after the hydrothermal reaction 3-5 times with distilled water, freezing, then drying in a vacuum freeze-drying machine for 48-72 hours, (v) placing the dried product in a tube furnace, maintaining at 550-850 degrees C under the protective atmosphere for 4-10 hours, cooling along with the furnace, and obtaining graphene aerogel-supported lithium iron phosphate porous composite material. An INDEPENDENT CLAIM is included for graphene aerogel-supported lithium iron phosphate porous composite material prepared by the preparation method of graphene aerogel-supported lithium iron phosphate porous composite material.