期刊
JOURNAL OF POWER SOURCES
卷 300, 期 -, 页码 351-357出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.09.083
关键词
Wet-spinning; Core/shell fiber; Graphene oxide; Silicon anode; Lithium-ion batteries
资金
- Development Program of the Korea Institute of Energy Research (KIER) [B4-2424]
- National Research Foundation of Korea (NRF) grant [NRF-2014R1A2A1A11052829, 2015-01003143]
- National Research Foundation of Korea (NRF) [NRF-2013H1A2A1033278]
- National Research Foundation of Korea [2013H1A2A1033278] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We present a fabrication of scalable coaxial core/shell silicon (Si)-graphene fiber prepared by dual-nozzle-induced wet-spinning assembly for high-performance Si anode. Over 50 wt% of Si nanoparticles mixed with graphene oxide suspension can be incorporated in the core with the outstanding dispersibility of unique silver-coated Si nanoparticles in aqueous media. The core fiber is further encapsulated by graphene shell which not only provides conducting pathways, but also alleviates severe volume expansion of Si core. This novel core/shell Si anode with double locked graphene architecture delivers more stable cycle performance and superior rate capability than anodes composed of simple mixture of Si-graphene composites. (C) 2015 Elsevier B.V. All rights reserved.
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