Instability of Ionic Liquid-Based Electrolytes in Li鈥揙2 Batteries

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• 作者：Supti Das ; Jonathan H酶jberg ; Kristian Bastholm Knudsen ; Reza Younesi ; Patrik Johansson ; Poul Norby ; Tejs Vegge
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：August 13, 2015
• 年：2015
• 卷：119
• 期：32
• 页码：18084-18090
• 全文大小：420K
• ISSN：1932-7455

文摘

Ionic liquids (ILs) have been proposed as promising solvents for Li鈥揳ir battery electrolytes. Here, several ILs have been investigated using differential electrochemical mass spectrometry (DEMS) to investigate the electrochemical stability in a Li鈥揙₂ system, by means of quantitative determination of the rechargeability (OER/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鈥揙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.