A review of solid-state halide electrolyte matched LiCoO₂ and Ni-rich NCM

Abstract The energy issue is an important issue affecting the development of countries worldwide. To solve the problem of resource depletion faced by fossil energy, to cope with global warming, and to achieve sustainable development, the development, utilization, and promotion of new energy sources have received universal attention. Halide solid electrolytes have a stable oxidation potential above 4 V, matching the LiCoO2 cathode material with considerable electrochemical performance. This review addresses the electrochemical performance and possible problems matching solid-state halide electrolytes with LiCoO2 and Ni-rich NCM. This paper concludes that halides have electrochemical stability and high ionic conductivity at high potentials matching LiCoO2 and Ni-rich NCM and good electrochemical properties. However, whether surface reactions exist when it is matched to a high nickel ternary material with a high surface base content, the evolution of the interface between the high nickel ternary material and the halide electrolyte during cycling and the factors affecting the performance of Ni-rich NCM in halide solid-state batteries need to be further investigated.