Phenylboronic Acid Functionalized Calix[4]pyrrole-based Solid-State Supramolecular Electrolyte.

Solid-state polymer electrolytes (SPEs) suffer from the low ionic conductivity and poor capability of suppressing lithium (Li) dendrites, which limits their utility in the preparation of all solid-state Li-metal batteries (LMBs). We report here a flexible solid supramolecular electrolyte that incorporates a new anion capture agent, namely a phenylboronic acid functionalized calix[4]pyrrole (C4P), into a poly(ethylene oxide) (PEO) matrix. The resulting solid-state supramolecular electrolyte demonstrated high ionic conductivity (1.9 × 10 -3 S cm -1 at 60°C) and a high Li + transference number (t Li+ = 0.70). Furthermore, the assembled Li|C4P-PEO-LiTFSI|LiFePO 4 cell allowed for stable cycling over 1200 cycles at 1 C at 60°C, as well as good rate performance. The favorable performance of the C4P-PEO-LiTFSI SPE leads us to suggest it could prove useful in the creation of high energy density solid-state LMBs. This article is protected by copyright. All rights reserved.