A Ternary Composite Nanofiber-Derived Thin Membrane Electrolyte for Solid-State Li Metal Batteries

Abstract

We develop novel membrane electrolytes comprising h-BN-doped poly(ethylene oxide) modified poly(vinylidene fluoride-co-hexafluoropropylene)-nanofibers (h-BN@PEO/PVH) with high ionic conductivity (3.3 × 10-4 S cm-1) and Li+ transference number (0.74), endowing solid LiFePO4//Li batteries with excellent cyclability over 1000 cycles at 60 °C. Our strategy surmounts ionic conduction-interface stability trade-off and thin dimension-flexibility conflict.