Network structures of fullerene-like carbon core/nano-crystalline silicon shell nanofibers as anode material for lithium-ion batteries
Network structures of fullerene-like carbon core/nano-crystalline silicon shell nanofibers as anode material for lithium-ion batteries
复制标题
类富勒烯碳核/纳米晶硅壳纳米纤维的网络结构作为锂离子电池负极材料
DOI：
10.1016/j.carbon.2012.10.066
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发表时间：
2013-04-01
期刊：
影响因子：
10.9
通讯作者：
He, Deyan
中科院分区：
文献类型：
--
作者：
Qiao, Li;Sun, Xiaolei;He, Deyan
Fullerene-like carbon (FLC) nanoparticles were prepared by depositing soot of burning castor oil. FLC core/nano-crystalline silicon (nc-Si) shell nanofibers with network structures have been fabricated by electrospinning and plasma enhanced chemical vapor deposition techniques. The morphologies and structures of the materials were characterized using scanning electron microscopy, transmission electron microscopy, and micro-Raman spectroscopy. It was demonstrated that the FLC core/nc-Si shell nanofibers on nickel foam can be used as electrode for lithium-ion batteries without adding any binding or conducting additives. High reversible specific capacity of 1164 mA h g(-1) is retained after 50 discharge/charge cycles at a constant current density of 100 mA g(-1). The electrode delivers prolonged cycle life and enhanced rate capability compared to pristine nc-Si film. The improved electrochemical performance could be attributed to that the FLC core provides facile strain relaxation to accommodate the large Si volume expansion and shrinkage during lithium-ion insertion and extraction. (c) 2012 Elsevier Ltd. All rights reserved.
