Functional use and performance analysis of lithium iron phosphate

Lithium iron phosphate electrode materials are critically used for power lithium batteries. Since 1996, NTT in Japan first revealed the olivine structure of AyMPO4 (A is an alkali metal, M is a combination of CoFe: LiFeCOPO4) lithium battery cathode material in 1997. The research group such as John.B.Goodenough of Texas State University in the United States also reported the reversible migration of LiFePO4 into and out of lithium. The United States and Japan coincidentally published the olivine structure (LiMPO4), which made the material affected. Great attention has been paid to it, and it has caused extensive research and rapid development. Compared with traditional lithium ion secondary battery cathode materials, spinel structured LiMn2O4 and layered structured LiCoO2, LiMPO4 has a wider source of raw materials, is cheaper and has no environmental pollution. Lithium iron phosphate performance 1. High energy density, its theoretical specific capacity is 170mAh/g, the actual specific capacity of the product can exceed 140mAh/g (0.2C, 25°C); 2. Safety, it is currently the safest lithium battery positive electrode Material; does not contain any heavy metal elements harmful to the human body; 3. Long life. Under the condition of 100% DOD, it can be charged and discharged more than 2000 times; (reason: lithium iron phosphate lattice stability is good, the insertion and extraction of lithium ions have little effect on the lattice, so it has good reversibility. Existing shortcomings It is the poor transmission rate of electron ions, which is not suitable for high-current charging and discharging, and is hindered in use. Treatment: coating the electrode surface with conductive material and doping to modify the electrode.) 4. No memory effect; 5. Charging performance , The lithium battery of lithium iron phosphate cathode material can be charged at a high rate, and the battery can be overflowed within 1 hour at the fastest. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What is the impact of moisture content on the performance of lithium iron phosphate battery packs