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최남순

Choi, Nam-Soon
Energy Materials Lab.
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Surface layer formed on silicon thin-film electrode in lithium bis(oxalato) borate-based electrolyte

Author(s)
Choi, Nam-SoonYew, Kyoung HanKim, HoKim, Sung-SooChoi, Wan-Uk
Issued Date
2007-10
DOI
10.1016/j.jpowsour.2007.07.058
URI
https://scholarworks.unist.ac.kr/handle/201301/6671
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34548668884
Citation
JOURNAL OF POWER SOURCES, v.172, no.1, pp.404 - 409
Abstract
A Si thin-film electrode of 200 nm is prepared using E-beam evaporation and deposition on copper foil. The use of a lithium bis(oxalato) borate (LiBOB)-based electrolyte markedly improves the discharge capacity retention of a Si thin-film electrode/Li half-cell during cycling. The surface layer formed on Si thin-film electrode in ethylene carbonate/diethyl carbonate (3/7) with 1.3 M LiPF6 or 0.7 M LiBOB is characterized by means of Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopic analysis. The surface morphology of the electrode after cycling is investigated using scanning electron microscopy. The relationship between the physical morphology and the electrochemical performance of Si thin-film electrode is discussed.
Publisher
ELSEVIER SCIENCE BV
ISSN
0378-7753
Keyword (Author)
silicon thin-film electrodelithium bis(oxalato) boratesurface chemistrysurface morphologylithium-ion battery capacity retention
Keyword
LIBOB-BASED ELECTROLYTESION BATTERIESRECHARGEABLE BATTERIESPROPYLENE CARBONATEAMORPHOUS-SILICONGRAPHITE ANODESSEI FORMATIONHIGH-CAPACITYPERFORMANCEADDITIVES

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