A new metal–organic rotaxane framework for enhanced ion conductivity of solid-state electrolyte in lithium-metal batteries

Abstract

The composite polymer electrolyte has been obtained via incorporating LiCUST-701 (a new metal–organic rotaxane framework modified by Li+) into poly(ethylene oxide) (PEO) matrix and give a high ionic conductivity of 4.02 × 10−4 S/cm at 60 °C. DFT calculations were used to visualize the possible diffusion pathway of Li+. The all-solid-state cell assembled with LiFePO4, composite polymer electrolyte and lithium metal foil delivered with excellent cycling capability and stability even under high current densities.