Nano LiFePO4 coated Ni rich composite as cathode for lithium ion batteries with high thermal ability and excellent cycling performance

Ni-rich LiNi0.82Co0.12Mn0.06O2 (denoted as NCM) is successfully coated by LFP nanoparticles (denoted as [email protected]) through physical mechanical fusion in industrial level. The 18650 full cells are assembled with [email protected] as cathode, which exhibits quite excellent cycling performance and thermal stability. After 500 cycles, [email protected] || Graphite full cell still delivers a discharge capacity of 165.3 mA h g−1 (capacity retention with 91.65%) at 1 C in voltage range from 3.0 to 4.2 V at room temperature. Besides, according to Accelerating rate calorimeter (ARC) test, the onset thermal runaway temperature Tc and self-heating interval time Δt of [email protected] || Graphite are much higher than that of NCM || Graphite, respectively, indicating an improved security performance of LFP-coated [email protected] || Graphite cell.