Effect of boron doped fullerene C60 film coating on the electrochemical characteristics of silicon thin film anodes for lithium secondary batteries

Title
Effect of boron doped fullerene C60 film coating on the electrochemical characteristics of silicon thin film anodes for lithium secondary batteries
Authors
아리이중기
Keywords
Fullerene; Thin Films; Boron-doped; Anodes; Lithium Secondary Batteries
Issue Date
2011-01
Publisher
Synthetic metals
Citation
VOL 161, 158-165
Abstract
In this work, boron doped fullerene (B:C60) films were prepared by the radio frequency plasma assisted thermal evaporation technique for use as a coating material for the silicon thin film anode in lithium secondary batteries. Raman and XPS analyses revealed that the boron atoms were well inserted into the fullerene film lattices. The effect of the B:C60 film on the electrochemical characteristics of the silicon thin film was studied by charge–discharge tests, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The B:C60 coated silicon film exhibited a high reversible capacity of more than 1200mAhg−1 when cycled 50 times between 0 and 2V at a current density of 1200mAcm−2 (1.5 C). The film also showed good rate capacity at different current densities and a more improved coulombic efficiency of 87.7% in the first cycle in comparison with that of the C60 coated film electrode.
URI
http://pubs.kist.re.kr/handle/201004/39343
ISSN
0379-6779
Appears in Collections:
KIST Publication > Article
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