Robust compound elastomers of integrated polymer cathode and electrolyte for high-performance all-solid-state lithium battery

Abstract

A novel type of all-solid-state lithium-organic batteries based on redox active multicomponent polyethers comprising stable nitroxide radicals, ethylene oxide groups and cross-linkable moieties has been demonstrated. The radical copolymer with a low glass transition temperature exhibits enhanced mixed conductivities of electron and ion. Furthermore, the in-situ cross-linking of the radical copolymer cathode and a comb-branched polyether electrolyte results in a flexible yet strong compound elastomer, which demonstrates a low interfacial resistance and fast ion transport. The fabricated lithium cell shows a high cycling stability with a low polarization and durable rate capability at room temperature, benefiting from the fast redox reactions in the organic cathode and the integrated structure. This work is expected to advance the development of flexible solid batteries with high electrochemical performance.