期刊
ACS NANO
卷 5, 期 4, 页码 2787-2794出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn200195k
关键词
graphene nanosheets; carbon nanofibers; lithium ion battery
类别
资金
- National Science Foundation of China [51077014, 21003028]
- Fundamental Research Funds for the Central Universities [HEUCF101006]
We report on the fabrication of 3D carbonaceous material composed of 1D carbon nanofibers (CNF) grown on 2D graphene sheets (GNS) via a CVD approach in a fluidized bed reactor. Nanographene-constructed carbon nanofibers contain many cavities, open tips, and graphene platelets with edges exposed, providing more extra space for Li(+) storage. More interestingly, nanochannels consisting of graphene platelets arrange almost perpendicularly to the fiber axis, which is favorable for lithium Ion diffusion from different orientation In addition, 3D interconnected architectures facilitate the collection and transport of electrons during the cycling process. As a result, the CNF/GNS hybrid material shows high reversible capacity (667 mAh/g), high-rate performance, and cycling,stability, which is superior to those of purE graphene, natural graphite, and carbon nanotubes. The simple,CVD approach offers a new pathway for large-scale production of novel hybrid carbon materials for energy storage.
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