Instability of Ionic Liquid-Based Electrolytes in Li-O2 Batteries
Journal article, 2015
Ionic liquids (ILs) have been proposed as promising solvents for Li-air battery electrolytes. Here, several ILs have been investigated using differential electrochemical mass spectrometry (DEMS) to investigate the electrochemical stability in a Li-O-2 system, by means of quantitative determination of the rechargeability (GER/ORR), and thereby the Coulombic efficiency of discharge and charge. None of the IL-based electrolytes are found to behave as needed for a functional Li-O-2 battery but perform better than commonly used organic solvents. Also the extent of rechargeability/reversibility has been found to be strongly dependent on the choice of IL cation and anion as well as various impurities.
Author
S. Das
Technical University of Denmark (DTU)
J. Hojberg
Technical University of Denmark (DTU)
Haldor Topsoe
K. B. Knudsen
Technical University of Denmark (DTU)
S. R. Younesi
Uppsala University
Technical University of Denmark (DTU)
Patrik Johansson
Chalmers, Applied Physics, Condensed Matter Physics
P. Norby
Technical University of Denmark (DTU)
T. Vegge
Technical University of Denmark (DTU)
Journal of Physical Chemistry C
1932-7447 (ISSN) 1932-7455 (eISSN)
Vol. 119 32 18084-18090Driving Forces
Sustainable development
Subject Categories
Materials Engineering
Nano Technology
Areas of Advance
Energy
Materials Science
DOI
10.1021/acs.jpcc.5b04950