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Choi, Nam-Soon
Energy Materials Lab
Research Interests
  • Rechargeable lithium battery, electrolytes for next generation Mg and Na battery

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Surface layer formed on silicon thin-film electrode in lithium bis(oxalato) borate-based electrolyte

Cited 47 times inthomson ciCited 41 times inthomson ci
Title
Surface layer formed on silicon thin-film electrode in lithium bis(oxalato) borate-based electrolyte
Author
Choi, Nam-SoonYew, Kyoung HanKim, HoKim, Sung-SooChoi, Wan-Uk
Keywords
Lithium bis(oxalato) borate; Lithium-ion battery capacity retention; Silicon thin-film electrode; Surface chemistry; Surface morphology
Issue Date
2007-10
Publisher
ELSEVIER SCIENCE BV
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.
URI
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DOI
10.1016/j.jpowsour.2007.07.058
ISSN
0378-7753
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ECHE_Journal Papers
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