What are the advantages of lithium iron phosphate batteries and ternary lithium batteries?

Ternary lithium battery The full name of ternary lithium battery is a ternary material battery, generally refers to a lithium battery using lithium nickel cobalt manganate (Li (NiCoMn) O2, NCM) or lithium nickel cobalt aluminate (NCA) ternary cathode material. The nickel salt, cobalt salt, and manganese salt are used as three different component ratios for different adjustments, so it is called ternary, which includes many types of batteries with different ratios. From the shape to distinguish, can be divided into soft-pack batteries, cylindrical batteries and square hard-shell batteries. Lithium iron phosphate battery Lithium iron phosphate battery uses lithium iron phosphate (LiFePO4) as the cathode material. Iron is used as the battery raw material for low cost, no heavy metals, and less environmental pollution. The working voltage is 3.2V. These two types of batteries have their own strengths. Under high temperature conditions, the ternary materials of ternary lithium batteries will decompose at 200°C, undergo a violent chemical reaction, release oxygen atoms, and are prone to burn or explode in high-temperature applications. Therefore, based on safety considerations, the Ministry of Industry and Information Technology of my country issued a special document in January 2016 to temporarily restrict the use of ternary lithium batteries to pure electric buses. The decomposition temperature of lithium phosphate batteries is 800°C, which is less likely to catch fire and is relatively safe. Under the experimental conditions, the remaining capacity of the lithium iron phosphate battery after 5000 cycles is 84%, and 1C (1C means the current intensity when the battery is fully discharged in one hour) can still maintain more than 80% of the initial capacity after 5000 cycles; ternary lithium After 3900 cycles of the battery, the remaining capacity is only 66%, and after 2500 cycles of 1C, it drops to 80% of the initial capacity. In comparison, the cycle life of lithium phosphate batteries is much longer than that of ternary lithium batteries. In addition, the energy density of the lithium iron phosphate battery is 120Wh/kg, which has basically reached the theoretical limit, while the energy density of the ternary battery is 180Wh/kg, and there is still much room for improvement in the future. In the competition with lithium iron phosphate batteries, the safety issues of ternary lithium batteries need to be improved. This has always been a shadow in the minds of automobile companies. Even the leading technology products such as Tesla ModelX have been used at home and abroad many times. A fire accident occurred in the battery pack. But in the long run, the ternary lithium battery has the incomparable high energy density and low temperature resistance characteristics of lithium iron phosphate batteries. In the future of the development of new energy vehicles, the ternary lithium battery will completely replace the safety and cost issues. The current market position of lithium iron phosphate will become the general trend in the new energy market. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What types of UPS power supplies?