| Uniform Nano-Sn/C Composite Anodes for Lithium Ion Batteries. | |
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MedLine Citation:
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PMID: 23282084 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Nano-Sn/C composites are ideal anode materials for high energy and power density Li-ion batteries. However, because of the low melting point of Sn and the tendency of grain growth, especially during high temperature carbonization, it has been a significant challenge to create well-dispersed ultra-small Sn nano-particles within a carbon matrix. In this paper, we demonstrate an aerosol spray pyrolysis technique, as a facile and scalable method, to synthesize a nano-Sn/C composite with uniformly dispersed 10 nm nano-Sn within a spherical carbon matrix. The discharge capacity of nano-Sn/C composite sphere anodes maintains the initial capacity of 710 mAh/g after 130 cycles at 0.25 C. The nano-Sn/C composite sphere anodes can provide ~600 mAh/g even at a high rate of 20 C. To the best of our knowledge, such high rate performance for Sn anodes has not been reported previously. The exceptional performance of the nano-Sn/C composite is attributed to the unique nano-Sn/C structure: 1) carbon matrix offers mechanical support to accommodate the stress associated with the large volume change of nano-Sn, thus alleviating pulverization; 2) the carbon matrix prevents Sn nano-particle agglomeration upon prolonged cycling; 3) carbon network provides continuous path for Li ions and electrons inside the nano-Sn/C composite spheres. |
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Authors:
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Chunsheng Wang; Yunhua Xu; Qing Liu; Yujie Zhu; Yihang Liu; Alex Langrock; Michael R Zachariah |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-2 |
Journal Detail:
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Title: Nano letters Volume: - ISSN: 1530-6992 ISO Abbreviation: Nano Lett. Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-1-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101088070 Medline TA: Nano Lett Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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