 Single-crystal Ni-rich cathode suffer from side reactions with the electrolyte and slow Li-ion transport during high-voltage cycling. Herein, a Li-1.4Y0.4T1.6, B04, 3-coating is applied to facilitate the Li-ion transport and improve the cycling life of the cell. This article was authored by Xinming Fan, Xinouyu, Wengao Zhao, and others.