Abstract:Lithium iron phosphate material has good cycling performance, thermal stability, environmental protection and other characteristics, and is constantly popular in lithium ion batteries.However, due to the low conductivity and slow diffusion rate of lithium ions, the development of the battery industry is affected.Therefore, this paper introduces the basic structure, preparation and modification methods of LiFePO4, including solid phase synthesis, hydrothermal method, surface coating and doping, etc., summarizes the existing problems and prospects of LiFePO4, analyzes the methods to improve the optimal performance of lithium iron phosphate, and predicts the future development trend.