Heterophase Engineering Creates a Built-in Highway to Achieve Local High-Concentration Phosphorus Doping for Robust K-Ion Storage.

ABSTRACT: Doping is a promising strategy to enhance the K⁺ storage performance of transition metal chalcogenides (TMCs), which are attractive conversion-type anodes for K-ion batteries (KIBs) due to their low cost and natural abundance. However, conventional doping approaches are often limited by low doping content or structural degradation at high doping levels, making it highly challenging to achieve efficient doping without compromising structural integrity. Herein, a local high-concentration doping strategy enabled by heterophase engineering is proposed to overcome this limitation. The boundaries in the heterophase of CoSe₂/ZnSe act as built-in highways for dopant diffusion and doping formation, achieving a remarkably high P doping content of 34 at.%. Such local high-concen

SUBMITTER: Sha D 

PROVIDER: S-EPMC12822424 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature