Surface halogenation engineering for reversible silicon-based solid-state batteries.

ABSTRACT: Silicon-based solid-state batteries are promising next-generation high-energy-density technologies. However, poor (electro)chemical compatibility between silicon negative electrodes and solid electrolytes (e.g., Li₆PS₅Cl) plus sluggish interfacial kinetics severely limits their reversibility and Coulombic efficiency. Here, we propose a surface halogenation strategy that transforms the native amorphous SiO₂ passivation layer on silicon particles into a functional Al(Si)OCl composite surface via controlled reaction with AlCl₃. This artificial interphase reconciles interfacial incompatibility and enables fast ionic/electronic transport, suppressing irreversible lithium loss. The optimized negative electrode achieves a high initial Coulombic efficien

SUBMITTER: Li H 

PROVIDER: S-EPMC12864858 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature