Constructing Stable Sub/Surface Structure to Boost Superior Cyclabilities of Single-Crystalline Ni-Rich Cathode.

ABSTRACT: Under prolonged high-voltage cycling, single-crystalline Ni-rich cathodes are prone to severe transition metal dissolution, irreversible phase transformations, and reduced structural stability, which significantly hinder their practical application. Hence, a dual-modification strategy is proposed and implemented for single-crystalline LiNi_0.90Co_0.05Mn_0.05O₂ (SCNCM90) cathodes by introducing Al/B gradient co-doping and an Al₅BO₉ surface coating to mitigate anisotropic structural changes. The subsurface Al/B gradient doping induces a lithium-rich vacancy disordered structure, which effectively suppresses the H2-H3 phase transition, while suppressing lattice strain and mechanical degradation. In parallel, the chemically stable

SUBMITTER: Chu Y 

PROVIDER: S-EPMC12667453 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature