Enhancing the cycle stability of Zr-doped LiNi0.83Co0.12Mn0.05O2 by co-precipitation

The ternary cathode material LiNi0.83Co0.12Mn0.05O2 (NCM) has excellent properties, such as superior energy density, low cost, and high voltage platform. Recently, it becomes one of the research hotspots of lithium-ion batteries (LIBs). However, NCM has insufficient cycle stability and cannot meet the demand for the high-rate capability, which limits its application in energy storage equipment. The precursor of NCM was modified with (Ni0.4Co0.2Mn0.4)1−xZrx(OH)2 by the co-precipitation. After high-temperature sintering, the diffusion of Zr4+ has significant impacts on the stability and capability for NCM. The doped sample exhibits a capacity retention rate of 79.5% at 1 C after 200 cycles and also delivers excellent rate performance, and the average specific discharge capacity is 189.4 mAh g−1 (2 C) and 180.6 mAh g−1 (5 C), respectively.