Abstract Ni-rich NCM (LiNixCoyMnzO2, 0.6≤x 4.3 V) are applied on these materials. Consequently, the batteries will suffer from aggravated side reactions at the cathode/electrolyte interface and the inherent instabilities of… Click to show full abstract
Abstract Ni-rich NCM (LiNixCoyMnzO2, 0.6≤x 4.3 V) are applied on these materials. Consequently, the batteries will suffer from aggravated side reactions at the cathode/electrolyte interface and the inherent instabilities of Ni-rich NCM cathodes, and thus exhibit rapid capacity fading and voltage decay. Herein, we report a facile and scalable strategy that employs Zr doping concurrent with LixZryOz surface coating, contributing to outstanding capacity retentions of 97.8% at 0.2C and 91.6% at 2C after 100 cycles over 2.8-4.5 V. The improved cycling stability can be attributed to the enhanced bulk stability and suppressed nonequilibrium diffusion reactions, which are further ascribed to the reduced oxygen vacancies and optimized microstructure.
               
Click one of the above tabs to view related content.