▎ 摘　　要

NOVELTY - Preparing lithium ion flow battery cathode material involves weighing a certain amount of lithium iron phosphate and Ketjen Black into the beaker of the solution containing graphene oxide, adding an appropriate amount of deionized water to the beaker, dispersing the mixture, placing the mixture obtained in a hydrothermal kettle to hydrothermally reduce graphene oxide, freeze-drying the solid obtained to obtain the positive electrode composite material. The positive electrode composite material obtained is mixed with the electrolyte to prepare a slurry. The positive electrode material is lithium iron phosphate-Ketjen black-reduced graphene oxide (rGO) composite material, including reduced graphene oxide (rGO) conductive network and lithium iron phosphate and Ketjen black placed between the reduced graphene oxide layers. USE - Method for preparing lithium ion flow battery cathode material used for preparing reduction oxidized graphene-based composite material. ADVANTAGE - The method enables to prepare lithium ion flow battery cathode material in a simple and feasible manner.