Liquid‐Like Phase of N,N‐Dimethylpyrrolidinium Iodide Impregnated into COFs Endows Fast Lithium Ion Conduction in the Solid State

Abstract A novel kind of solid‐state lithium electrolyte was fabricated by impregnating organic ionic plastic crystals (OIPCs) into the pores of covalent organic frameworks (COFs). The liquid‐like phase of confined N , N ‐dimethylpyrrolidinium iodide (P 1,1 I) and the ordered nanochannels of COFs simultaneously stimulated the lithium ion conduction.