Revisiting high-valence dopant mechanisms in Ni-rich cathodes: cation ordering dominates over morphological alignment for enhanced stability.

ABSTRACT: Layered ultra-high-nickel oxides are promising cathodes for high-energy-density lithium-ion batteries but suffer from severe structural degradation. Although high-valence doping is widely employed to enhance stability, the underlying mechanism-whether dominated by morphological alignment or cation ordering-remains contested. Through systematic investigation of W⁶⁺-doped LiNi_0.92Co_0.04Mn_0.04O₂ across varied doping concentrations and sintering temperatures, this work demonstrates that cation ordering, rather than morphological alignment, plays the decisive role in electrochemical enhancement. Although W-doping refines primary particles and sustains a radial microstructure even under extreme sintering conditions (up to 850 °C), correlatio

SUBMITTER: Wang S 

PROVIDER: S-EPMC12709538 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature