| Hierarchical nanostructured core-shell Sn@C nanoparticles embedded in graphene nanosheets: spectroscopic view and their application in lithium ion batteries. | |
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MedLine Citation:
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PMID: 23376983 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Hierarchical carbon encapsulated tin (Sn@C) embedded graphene nanosheet (GN) composites (Sn@C-GNs) have been successfully fabricated via a simple and scalable one-step chemical vapor deposition (CVD) procedure. The GN supported Sn@C core-shell structures consist of a crystalline tin core, which is thoroughly covered by a carbon shell and more interestingly, extra voids are present between the carbon shell and the tin core. Synchrotron spectroscopy confirms that the metallic tin core is free of oxidation and the existence of charge redistribution transfer from tin to the carbonaceous materials of the shell, facilitating their intimate contact by chemical bonding and resultant lattice variation. The hybrid electrodes of this material exhibit a highly stable and reversible capacity together with an excellent rate capability, which benefits from the improved electrochemical properties of tin provided by the protective carbon matrix, voids and the flexible GN matrices. |
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Authors:
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Dongniu Wang; Xifei Li; Jinli Yang; Jiajun Wang; Dongsheng Geng; Ruying Li; Mei Cai; Tsun-Kong Sham; Xueliang Sun |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-2-4 |
Journal Detail:
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Title: Physical chemistry chemical physics : PCCP Volume: - ISSN: 1463-9084 ISO Abbreviation: Phys Chem Chem Phys Publication Date: 2013 Feb |
Date Detail:
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Created Date: 2013-2-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100888160 Medline TA: Phys Chem Chem Phys Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario, N6A 5B9 Canada. xsun@eng.uwo.ca. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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