The Improved Interfacial and Thermal Stability of Nickel‐Rich LiNi0.85Co0.10Mn0.05O2 Cathode in Li‐Ion Battery via Perovskite La4NiLiO8 Coating

Abstract Capacity attenuation caused by Ni dissolution and interface instability during cycling is a major challenge because it limits the application of high Ni ternary cathode materials in Li‐ion batteries. In this paper, ternary LiNi 0.85 Co 0.10 Mn 0.05 O 2 cathode with high nickel content was prepared by co‐precipitation method, and then was coated with perovskite La 4 NiLiO 8 via the simple thermochemical method. The analysis of the images of transmission electron microscope (TEM) showed that the coating is uniformly covered on the surface of NCM85 material with a thickness of 5 nm. Compared to uncoated sample, the La 4 NiLiO 8 ‐coated LiNi 0.85 Co 0.10 Mn 0.05 O 2 material shows lower electrochemical impedance and better cyclic stability, the initial kinetic diffusion coefficient and the interface stability of the prepared material are greatly improved. Meanwhile, the problems of Li + /Ni 2+ mixing are also been solved. This work provides a new strategy for improving the interface and thermal stability of the nickel cathode material of Li‐ion battery in the future.