期刊
JOURNAL OF POWER SOURCES
卷 254, 期 -, 页码 33-38出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2013.12.044
关键词
Polymer derived ceramic; Silicon oxycarbide; Electrospinning; Carbon nanofiber; Lithium-ion battery; Anode
资金
- U.S. Department of Energy [DE-EE0001177]
- Advanced Transportation Energy Center, ERC Program of the National Science Foundation [EEC-08212121]
- Open Foundation of Top Academic Discipline of Applied Chemistry
- Eco-Dyeing & Finishing Engineering of Textiles of Zhejiang Province
- Zhejiang Provincial Natural Science Foundation [LY12E03005]
One-dimensional silicon oxycarbide (SiOC)/C composite nanofibers were fabricated by electrospinning and subsequent heat treatment. Introducing carbon matrix to SiOC anode material is an efficient way to accommodate the large volume changes during cycling and also increase the amount of free carbon, which is beneficial for improving the reversible capacity. These SiOC/C composite nanofibers form freestanding conductive membranes that can be used directly as battery electrodes without adding carbon black or polymer binder. Results show that after 80 cycles, the discharge capacity of SiOC/C composite nanofiber anodes is 70% higher than that of Si/C nanofiber anodes and more than 1.5 times larger than those of commercial anodes made from graphite. It is, therefore, demonstrated that one-dimensional SiOC/C nanofibers are promising anode material with large capacities and good cycling stability. (C) 2013 Elsevier B.V. All rights reserved.
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