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题名: Fabrication of superior-performance SnO2@C composites for lithium-ion anodes using tubular mesoporous carbon with thin carbon walls and high pore volume
作者: Han, Fei1;  Li, Wen-Cui1;  Li, Ming-Run2;  Lu, An-Hui1
刊名: JOURNAL OF MATERIALS CHEMISTRY
发表日期: 2012
DOI: 10.1039/c2jm31359f
卷: 22, 期:19, 页:9645-9651
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: A tubular composite, including ultrafine SnO2 particles encapsulated in ordered tubular mesoporous carbon with thin walls and high pore volume, is fabricated through the in situ hydrolysis method. It is observed that up to 80 wt% of SnO2 particles with size between 4-5 nm are highly dispersed and homogeneously encapsulated in the mesopore channels and no bulky aggregates are visible. The tubular composite exhibits a considerably high reversible capacity of 978 mA h g(-1) and a high initial efficiency of 71% at a current density of 200 mA g(-1) between 0.005-3 V. Its reversible capacity even increases up to 1039 mA h g(-1) after 100 cycles, which is much higher than the conventional theoretical capacity of SnO2 (782 mA h g(-1)), meanwhile, it also displays fast discharge/charge kinetics at a high current density of 1500 mA g(-1). The excellent electrochemical performance is ascribed to its unique mesostructure by recruiting tubular mesoporous carbon with thin carbon walls (similar to 2 nm) and high pore volume (2.16 cm(3) g(-1)). This tubular nanostructure provides confined nanospace for hosting immobilized ultrafine SnO2 with high loading, compensates volume expansion of SnO2, warrants efficient contact between nanoparticles and carbon matrix before and after Li+ insertion. We believe this special structure model might be extended for the fabrication of other cathode and anode electrode materials, to achieve high performance LIBs.
关键词[WOS]: ELECTROCHEMICAL ENERGY-STORAGE ;  ONE-POT SYNTHESIS ;  SNO2 NANOPARTICLES ;  AMORPHOUS OXIDE ;  BINDER-FREE ;  LI STORAGE ;  BATTERIES ;  CAPACITY ;  TIN ;  ELECTRODE
语种: 英语
WOS记录号: WOS:000303207100033
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138092
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Univ Technol, State Key Lab Fine Chem, Sch Chem Engn, Fac Chem Environm & Biol Sci & Technol, Dalian 116024, Peoples R China
2.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Han, Fei,Li, Wen-Cui,Li, Ming-Run,et al. Fabrication of superior-performance SnO2@C composites for lithium-ion anodes using tubular mesoporous carbon with thin carbon walls and high pore volume[J]. JOURNAL OF MATERIALS CHEMISTRY,2012,22(19):9645-9651.
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