期刊
CARBON
卷 39, 期 4, 页码 493-496出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0008-6223(00)00157-3
关键词
carbon filaments; activation; surface treatment; electrochemical properties
The electrochemical characteristics of vapor-derived carbon filaments of diameter 0.1 mum were studied by charge discharge testing of a lithium-ion secondary cell with a lithium metal electrode. After activation, followed by either nitridation or reduction in hydrogen, vapor-derived carbon filaments show high reversible charge and discharge capacities. An ordered structure and a large pore size are favorable for a high capacity, as shown by comparison of vapor-derived and pitch-derived carbons. The combination of a high specific surface area and a large amount of oxygen-containing surface functional groups results in 3 high irreversible capacity. To improve the anodic performance, it is important to control the surface microstructure by decreasing the surface oxygen content by nitridation or reduction in H-2, while maintaining order in the crystallographic structure with surface mesoporosity. (C) 2001 Elsevier Science Ltd. All rights reserved.
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