Lithium iron phosphate batteries and other lithium batteries are only different from the cathode material, and the process is similar to other lithium batteries. The major procedures are as follows: ingredients-coating-roll pressing-slitting-sheet making-winding-assembly-laser welding-baking-liquid injection-activation-formation-sealing-cleaning-volume separation-sorting. The main difference is that the lithium iron phosphate material has poor electrical conductivity, so the material particles are made relatively fine, and the specific surface is large, which makes it difficult to disperse the ingredients and is easy to absorb water. The other differences are really small.

　　Lithium iron phosphate batteries and other lithium batteries are only different in cathode materials, and the process is similar to other lithium batteries. The major procedures are as follows: ingredients-coating-roll pressing-slitting-sheet making-winding-assembly-laser welding-baking-liquid injection-activation-formation-sealing-cleaning-volume separation-sorting. The main difference is that the lithium iron phosphate material has poor electrical conductivity, so the material particles are made relatively fine, and the specific surface is large, which makes it difficult to disperse the ingredients and is easy to absorb water. The other differences are really small.

　　As a high-performance secondary green battery, lithium-ion battery has high voltage, high energy density (including volume energy, mass specific energy), low self-discharge rate, wide operating temperature range, long cycle life, environmental protection, There is no memory effect and the advantages of large current charge and discharge. The improvement of the performance of lithium-ion batteries is largely determined by the improvement of the performance of electrode materials, especially cathode materials. Currently, the most widely studied cathode materials are LiCoO2, LiNiO2 and LiMn2O4. However, due to the toxicity of cobalt and limited resources, the preparation of lithium nickelate is difficult, the cycle performance and high temperature performance of lithium manganate are poor, and other factors restrict their application and development. Therefore, the development of new, high-energy and inexpensive cathode materials is crucial to the development of lithium-ion batteries.

　　In 1997, Padhi et al. reported that lithium iron phosphate (LiFePO4) with an olivine structure can reversibly insert and remove lithium, and has the characteristics of high specific capacity, good cycle performance, stable electrochemical performance, and low price. It is the preferred new generation Green cathode material, especially as a power lithium-ion battery material. The discovery of lithium iron phosphate has attracted the attention of many researchers in the electrochemical industry at home and abroad. In recent years, with the increasing application of lithium batteries, more and more researches have been done on LiFePO4.