The paradoxical role of rock-salt phases in high-nickel cathode stabilization: engineering a detrimental structure into a beneficial structure

) creates entropy-stabilized rock-salt layers with optimized lithium transport, while integration with single-crystal morphologies provides superior resistance to structural degradation by minimizing oxygen-release-prone interfaces. This review establishes design principles for next-generation high-nickel cathodes, transforming a traditionally detrimental process into a strategic enhancement mechanism for advanced lithium-ion battery applications.