Research progress on surface coating modification of nickel-rich cathode materials for high energy density lithium-ion battery
Layered lithium nickel cobalt manganese oxide(LiNi1-x-yCoxMnyO2,0＜x+y＜1)is one of the most popular cathode materials for power lithium-ion batteries due to its high energy density and low cost.However,issues such as irreversible phase transitions and transition metal ion dissolution during lithium cycling,caused by lithium ion extraction and lattice oxygen loss,lead to capacity degradation,structural deterioration,and safety concerns.These issues severely limit its application in electric vehicles.Surface coating modification techniques aim to enhance the cycling stability and safety performance of the cathode materials by improving interface stability between the cathode material and electrolyte,suppressing micro-crack formation,and enhancing the thermal stability of the batteries.This article systematically introduces a series of innovative coating strategies developed by our research group to improve the electrochemical performance of high-nickel ternary cathode materials,based on the analysis of interface degradation mechanisms of high-nickel ternary cathode materials.The goal is to provide new insights for the development and application of high-performance lithium-ion battery cathode materials.
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维普
