Instability of Ionic Liquid-Based Electrolytes in Li–O 2 Batteries

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 o...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2015-08, Vol.119 (32), p.18084-18090
Main Authors: Das, Supti, Højberg, Jonathan, Knudsen, Kristian Bastholm, Younesi, Reza, Johansson, Patrik, Norby, Poul, Vegge, Tejs
Format: Article
Language:English
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Summary: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.
ISSN:1932-7447
1932-7455
1932-7455
DOI:10.1021/acs.jpcc.5b04950