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Lithium iron phosphate has high safety factor but low energy density

by:dcfpower     2021-03-04
There are roughly two systems for power lithium battery pack cathode materials: ①Phosphate series, including lithium iron phosphate, lithium manganese phosphate, lithium vanadium phosphate, etc., as well as lithium iron manganese phosphate and lithium iron cobalt phosphate developed on this basis; ②Manganese-containing materials such as lithium manganese oxide (such as NCM) and materials such as manganese-free lithium nickel cobalt aluminate (NCA) developed on this basis, there is currently no unified name for this system. For ease of presentation, the lithium iron phosphate and ternary materials with the largest amount of each represent the two systems. u003cpu003eu003c/pu003eu003cpu003e The performance requirements of electric vehicles for power batteries are mainly reflected in the two aspects of safety and energy density. Needless to say, safety is the first choice of any vehicle; in addition, the space of the vehicle is limited and the cruising range is required. Therefore, the energy density of the power battery is also very important. There are many factors that affect the performance of lithium-ion batteries, and the cathode material is an important factor that plays a leading role. Therefore, before developing power lithium battery pack technology, enterprises in different countries and regions first consider which system of cathode materials to choose. u003c/pu003eu003cpu003eu003c/pu003e Generally speaking, theoretically, the advantages of lithium iron phosphate are high safety factor and long cycle life, and the disadvantage is that the energy density is not high; ternary materials are just the opposite. Most Japanese and Korean companies choose the ternary material route, focusing on the safety and cycle life of the ternary material; Chinese (including Taiwan) and American companies basically chose the lithium iron phosphate route, focusing on increasing energy density. What needs to be mentioned is that, perhaps out of safety considerations, relevant Chinese government authorities and officials at that time explicitly or implicitly encouraged companies to take the lithium iron phosphate route. u003c/pu003e
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