Investigation of the structure and performance of Li[LiNiMn]O Li-rich cathode materials derived from eco-friendly and simple coating techniques.

Constructing uniform nanoceramic coating layers is a well-known challenge in the field of coating materials. Herein, AlO-coated Li[LiNiMn]O (LLNM) Li-rich cathode materials are successfully prepared through a dry prilling coating (DPC) method. The structures and electrochemical performances of the AlO-coated products are systematically examined. Typically, the cycling stability is enhanced and voltage degradation upon cycling is reduced, benefiting from the unique and controllable nano-sized AlO coating layer. Moreover, metal ion dissolution is avoided when using the DPC method, which is eco-friendly and suitable for large scale production.