Modification of LiNi0.8Co0.1Mn0.1O2 cathode materials from the perspective of chemical stabilization and kinetic hindrance

Nickel-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) with layered crystal structure is regarded as a promising positive electrode material for lithium-ion batteries due to its relatively high specific capacity, outstanding rate performance, and remarkable cycle stability. Nevertheless, the challenges such as capacity attenuation and voltage decline have seriously hindered its large-scale applications. Significantly, the thermodynamic instability of the H3 phase inevitably triggers undesirable cationic disordering and oxygen evolution reaction, which further induce a series of problems. Herein, we have systematically reviewed the research progress of NCM811 from the perspective of chemical stabilization of lattice structure and kinetic hindrance of cathode-electrolyte interface, and summarized the relationship between performance fading mechanism and corresponding strategies. Moreover, new ideas for further modification of ameliorating crystal structure stability and further improvement of NCM811 electrochemical properties are provided, which shines a light on the development of Ni-rich materials in LIBs.