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최남순

Choi, Nam-Soon
Energy Materials Lab.
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Effect of Fluoroethylene Carbonate on Electrochemical Performances of Lithium Electrodes and Lithium-Sulfur Batteries

Author(s)
Song, Ju-HyeYeon, Jin-TakJang, Jun-YeongHan, Jung-GuLee, Sang-MinChoi, Nam-Soon
Issued Date
2013-04
DOI
10.1149/2.101306jes
URI
https://scholarworks.unist.ac.kr/handle/201301/2621
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84884319026
Citation
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.160, no.6, pp.A873 - A881
Abstract
The positive impact of a fluoroethylene carbonate (FEC) solvent on the interfacial stability of Li metal electrodes and the electrochemical performance of lithium-sulfur (Li-S) cells is investigated. To confirm the effects of FEC on electrolyte decomposition and cell resistance, the surface chemistry and impedance of an Li electrode cycled in electrolytes with and without a FEC solvent are investigated using attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), time of flight secondary ion mass spectrometry (ToF-SIMS), and electrochemical impedance spectroscopy. A protective layer with a FEC solvent for the formation of robust SET and carbonate-based solvents for the suppression of polysulfide attack against an Li anode was formed on the Li anode by UV-curing polymerization. It is found that the protective layer with FEC effectively suppresses the significant overcharge by the shuttle process of polysulfide species and improves cycling performance of Li-S cells.
Publisher
ELECTROCHEMICAL SOC INC
ISSN
0013-4651
Keyword
X-RAY-DIFFRACTIONION BATTERIESINTERFACIAL ENHANCEMENTCOMPOSITE ELECTRODESPOLYMER ELECTROLYTESLIQUID ELECTROLYTEMETAL-ELECTRODERATE CAPABILITYDISCHARGECATHODE

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