The lithium-ion battery has a high voltage, high than energy, no memory effect, no environmental pollution, has become the main choice for green high-energy secondary batteries in the 21st century. At present, commercial lithium-ion battery positive material LiCoO2, due to limited cobalt reserves, high prices, high toxicity, high cost and safety problems of lithium-ion battery, seriously hinder the further development of lithium-ion batteries, limited it in a broader field Applications. Urgent need for researchers to develop a low cost and excellent lithium-ion battery positive material to meet the needs of emerging industries such as electric vehicles, and the Mn2O4 skeleton in the spinel type LIMN2O4 is a four-sided and octahedron contributing to Li + diffusion. Three-dimensional network. Compared with LiCoo2 and LiniO2, this material has the advantages of raw material resources, easy to prepare, low cost, good and safe, no environmentally friendly, embedded, de-density potential, theoretical capacity is 148mA .h / g, the actual capacity can be close to the theoretical capacity, reaching 130-140mA .h / g, spinel type LIMN2O4 common synthetic method has multiple steps high-profile synthesis method, sol, gel method, precipitation method, etc. The material is difficult to use as a lithium battery positive material is not because its theoretical capacity is low, but because of its poor performance, particularly capacity decline at higher temperatures, how to overcome the spinel type LIMN2O4 in electricity The phenomenon of capacity decline in the chemical cycle is currently the focus of spinel LiMn2O4. This phenomenon is not only related to the nature of the spinel type LIMN2O4 itself, but also closely related to the nature of the electrolyte.Lifepo4 has an olivine type structure, operating voltage 3 ~ 4V, theoretical specific capacity 170mA .h / g, the circulatory performance is excellent, the structure of the electrode during charge and discharge is small, is a lithium battery positive material for development prospects, LifePo4 The main preparation method is the chemical precipitation method and sol pick. However, the electrically conductive performance difference of LifePO4, the diffusion speed of R is slow, and the material utilization rate is low, and the magnification of the electrode is poor. LifePO4's nanowin can shorten the diffusion path of 铿 子, improve the electrochemical performance of the LIFEPO4 electrode, but the nano LifePO4 has serious agglomeration in the electrochemical cycle process, and the cycle performance is not good. Composite lithium compounds include composite cationic lithium compounds and composite anionic phosphithium compounds, which have a wide variety of materials, diverse synthetic methods, not easy to find the best preparation method, optimal element combination and composition optimum amount. At present, it is most concerned that the layered Li [Coxni1-2x, Mnx] O2 solid solution, the first discharge capacity of 160mA. H / g above, the thermal stability, low cost, excellent in circulatory performance, industrialization prospects Minglang, it has caused people's widespread concern. Recommend: LiFePO4 Battery Manufacturer Energy storage battery Manufacturer Integrated machine energy storage battery series Manufacturer Lead lithium battery Manufacturer Outdoor Backup Battery Manufacturer Portable outdoor power supply Manufacturer Power battery Manufacturer Powerwall LiFePO4 Battery Manufacturer Battery rack Manufacturers Telecom LiFePO4 Battery Manufacturer Wall mounted battery storage Manufacturer China Lifepo4 Battery
