Challenges and strategies for the cyclic stability of Ni-rich layered oxide cathode materials

Ni-rich cathode materials have become the mainstream choice in the mileage electric vehicle sector due to their high specific capacity and safety factor. However, the volume changes occurring during charging and discharging lead to microcracking and surface remodeling, posing challenges to achieving such as high specific capacity and long cycle stability. This paper reviews existing modification strategies for Ni-rich layered oxide cathode materials. Unlike previous reviews and related papers, we comprehensively discuss a variety of modification strategies and deeply discuss the synergistic modification effect of surface coating and bulk doping, which is how to improve the cycling stability of the Ni-rich cathode. In addition, based on recent research advances, the prospects and challenges of modifying Ni-rich layered cathodes for cycle stability upgrading of the lithium-ion battery, as well as the potential application prospects in the field of power automobiles, are comprehensively analyzed.