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Instability of Ionic Liquid-Based Electrolytes in Li-O2 Batteries

S. Das ; J. Hojberg ; K. B. Knudsen ; R. Younesi ; Patrik Johansson (Institutionen för teknisk fysik, Kondenserade materiens fysik) ; P. Norby ; T. Vegge
Journal of Physical Chemistry C (1932-7447). Vol. 119 (2015), 32, p. 18084-18090.
[Artikel, refereegranskad vetenskaplig]

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.



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Denna post skapades 2015-09-11. Senast ändrad 2016-08-19.
CPL Pubid: 222266

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens fysik (1900-2015)

Ämnesområden

Energi
Materialvetenskap
Hållbar utveckling
Materialteknik
Nanoteknik

Chalmers infrastruktur