期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 162, 期 2, 页码 A3103-A3109出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0161502jes
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资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea government Ministry of Trade, Industry and Energy [20112010100110/KIER B4-2462, 20124010203290]
Ionic liquid-based electrolytes composed of diethylene glycol diethyl ether (DEGDEE) and 1-butyl-1-methyl pyrrolidinium bis(trifluoromethane) sulfonyl imide (BMP-TFSI) were prepared and evaluated for non-aqueous lithium-air cell applications. Adding an appropriate amount of BMP-TFSI to the electrolyte solution improved ionic conductivity, oxidative stability and interfacial stability, and reduced flammability and volatility. When BMP-TFSI was mixed with DEGDEE under optimal condition, the cycle performance was remarkably improved as compared with either the organic electrolyte or ionic liquid electrolyte alone. The Li-air cell assembled with an optimized ionic liquid-based mixed electrolyte initially delivered a high discharge capacity of 10,620 mAh g(-1) and exhibited good cycling stability exceeding 150 cycles at a current density of 0.1 mA cm(-2) by limiting depth of discharge to 500 mAh g(-1). (C) The Author(s) 2015. Published by ECS.
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