Anion amphiprotic ionic liquids as protic electrolyte matrices allowing sodium metal plating
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Updated: Jan 6, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
Piotr Jankowski1, Karolina Matuszek2, Marcel Treskow3
1Department of Physics, Chalmers University of Technology, Gothenburg, Sweden and Department of Energy Conversion and Storage, Technical University of Denmark, Kgs. Lyngby, Denmark. pioja@dtu.dk and Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland.
Abstract:
The sodium-ion battery (SIB) is proposed as a complementary technology to today's commercially dominant lithium-ion battery (LIB). While much know-how can be transferred from LIBs to SIBs, adjustments are still necessary, not the least for the electrolytes employed. Here the use of anion amphiprotic ionic liquid (AAIL) based electrolytes is proposed for SIB application. Two different AAILs, based on organic trifluoromethylsulfonylamide (TFSAm) and inorganic HSO4- anions, respectively, doped with NaTFSI salt have been studied, focusing on electrochemical stability and transport properties, complemented by studies of the ion-ion interactions, and final sodium-ion battery performance via stripping/plating vs. sodium metal electrodes.
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