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Lithium-oxygen batteries with ester-functionalized ionic liquid-based electrolytes

Title
Lithium-oxygen batteries with ester-functionalized ionic liquid-based electrolytes
Author
김동원
Keywords
LI-AIR BATTERY; TEMPERATURE MOLTEN-SALTS; GLYCOL DIETHYL-ETHER; LI-O-2 BATTERIES; ELECTROCHEMICAL PERFORMANCE; CARBONATE ELECTROLYTES; GRAPHENE NANOSHEETS; CATHODE CATALYSTS; CELLS; STABILITY
Issue Date
2015-09
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v. 5, NO 97, Page. 80014-80021
Abstract
Ester-functionalized ionic liquids with different cations (imidazolium, pyrrolidinium, piperidinium, morpholinium) and a bis(trifluoromethanesulfonyl) imide anion were synthesized and subsequently mixed with tetra(ethylene glycol) dimethylether (TEGDME) at different concentrations. The mixed solutions were ultimately investigated for their applicability as the electrolyte in non-aqueous lithium-oxygen batteries. Among the ionic liquids investigated, the pyrrolidinium-based ionic liquid, ethyl-N-methylpyrrolidinium-N-acetate bis(trifluoromethanesulfonyl) imide (MEEsPyr-TFSI), exhibited a lower viscosity, higher ionic conductivity and wider electrochemical stability window than any other ionic liquids. The addition of an appropriate amount of MEEsPyr-TFSI to the TEGDME-based organic electrolyte had a positive effect on the ionic conductivity, electrochemical stability and oxygen radical stability. A mixed ionic liquid-based solution with an optimum composition was successfully employed as a promising electrolyte for lithium-oxygen batteries with good cycling stability.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA13682B#!divAbstracthttp://hdl.handle.net/20.500.11754/27521
ISSN
2046-2069
DOI
10.1039/c5ra13682b
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COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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