Method for preparing LiFePO4/C composite material by using sol-gel method

The invention relates to a method for preparing an LiFePO4/C composite material by using a sol-gel method, belonging to the technical field of lithium ion batteries. According to the method provided by the invention, the size and the morphology of an LiFePO4 grain are effectively controlled through changing gelatin concentration and subsection thermal treatment, and thus the LiFePO4/C composite material has excellent electrochemical performance. The method is simple in process, environment-friendly, strong in controllability, short in production period, and low in energy consumption; industrialized implementation is extremely easily realized.