Electrochemical characteristics of amorphous carbon coated silicon electrodes

Title
Electrochemical characteristics of amorphous carbon coated silicon electrodes
Authors
O. M. Vovk나병기조병원이중기
Keywords
Fullerene C60; Lithiium secondary batteries; r.f. plasma sputtering; UV-vis spectra; Raman Spectra; carbon film; Anode of Lithium Secondary Batteries
Issue Date
2009-07
Publisher
The Korean journal of chemical engineering
Citation
VOL 26, NO 4, 1034-1039
Abstract
The properties of carbon films deposited by the radio frequency plasma sputtering of a fullerene C60 target were investigated to elucidate the dependence on the plasma power. A radio frequency argon plasma power ranging from 50 to 300W at a pressure of 1.3 Pa was applied for sputtering. This corresponds to a self-bias potential on the target ranging from −95 to −250 V and a maximum argon ion energy ranging from 240 to 575 eV. The analysis of the G and D peaks in the Raman spectra shows that the films are similar to tetragonal hydrogenated amorphous carbon annealed at 600-1,000 oC. The electron band structure of the carbon films deposited by the sputtering of C60 depends on the plasma power. The coating effect of these carbon films on the capacity performance of the silicon film electrode of lithium secondary batteries was significant in our experimental range. An electrochemical test revealed that such carbon thin film on the silicon electrode plays an important role in mitigating the capacity fading during the charge and discharge processes. The test revealed that the film formed at a plasma power of 300 W is the most effective.
URI
http://pubs.kist.re.kr/handle/201004/35548
ISSN
0256-1115
Appears in Collections:
KIST Publication > Article
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