Cycling Performances of Lithium-Air Cells Assembled with Mixed Electrolytes of Ionic Liquid and Diethylene Glycol Diethyl Ether

Title
Cycling Performances of Lithium-Air Cells Assembled with Mixed Electrolytes of Ionic Liquid and Diethylene Glycol Diethyl Ether
Authors
김동원
Keywords
OXYGEN REDUCTION; CARBONATE ELECTROLYTES; BATTERIES; ELECTROCHEMISTRY; PERSPECTIVE; LI2O2
Issue Date
2015-02
Publisher
ELECTROCHEMICAL SOC INC
Citation
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v. 162, NO 2, Page. 3103-3109
Abstract
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.
URI
http://jes.ecsdl.org/content/162/2/A3103http://hdl.handle.net/20.500.11754/22099
ISSN
0013-4651; 1945-7111
DOI
http://dx.doi.org/10.1149/2.0161502jes
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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