Improvement of electrochemical performance of Na+ doped LiNi0.8Co0.1Mn0.1O2 based cathode materials encapsulated with stabilized ZrO2 coating

Abstract

In this paper, the high nickel ternary precursor Ni0.8Co0.1Mn0.1(OH)2 is prepared by the hydrothermal method, and the high nickel ternary cathode material LiNi0.8Co0.1Mn0.1O2 is produced by adding LiOH calcination. The effects of Na+ doping and ZrO2-coating co-modification on the crystal structure, microscopic morphology, and electrochemical properties of high nickel ternary cathode materials are explored. The results show that the discharge-specific capacity of the co-modified cathode material doped with 2 % Na+ and capped with ZrO2 reaches 221.5 mA·g−1, and the capacity retention rate is still as high as 96.4 % after 100 cycles of charging and discharging.