Unveiling the Cation Exchange Reaction between the NASICON Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> Solid Electrolyte and the pyr13TFSI Ionic Liquid
Andrea Paolella, Giovanni Bertoni, Wen Zhu, Daniele Campanella, Andrea La Monaca, Gabriel Girard, Hendrix Demers, Alina Cristina Gheorghe Nita, Zimin Feng, Ashok K. Vijh, Abdelbast Guerfi, Michel L. Trudeau, Michel Armand, Sergey Krachkovskiy
Abstract
Recently, the formation of the ceramic–ionic liquid composite has attracted huge interest in the scientific community. In this work, we investigated the chemical reactions occurring between NASICON LAGP ceramic electrolyte and ionic liquid pyr13TFSI. This study allowed us to identify the cation exchange reaction pyr13-Li occurring on the LAGP surface, forming a LiTFSI salt that was detected by the nuclear magnetic resonance analysis. In addition, using 6Li foils, we succeeded in demonstrating that both LAGP and LiTFSI:pyr13TFSI participate in the diffusion of Li ions by the formation of an ionic bridge between two species.