Stabilizing CuTCNQ Cathodes in Sulfide-Based All-Solid-State Organic Lithium Batteries via a Fluoroiodinated Molecular Modifier

Abstract

A fluoroiodinated molecular modifier, C₆F₁₃I, is introduced to stabilize the CuTCNQ/Li₆PS₅Cl interface in sulfide-based all-solid-state lithium-organic batteries. Its electrochemical activation generates a conformal LiF/LiI/organofluorinated interphase, suppressing electrolyte decomposition, preserving Li⁺ transport, and markedly improving the rate capability and cycling stability of the CuTCNQ cathode.