Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 12, Issue 10, Pages 1302-1306Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2010.07.005
Keywords
Core-shell nanostructure; Graphene nanosheets; Lithium-ion battery; Sn-Sb
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Funding
- National Natural Science Foundation of China [50971085, 50701029, 10774118]
- Shanghai Science & Technology Committee [09JC1406100, 09530501200, 09ZR1411800]
- Shanghai Municipal Education Commission [09zz96, 10YZ03, S30109]
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This paper reports the preparation and Li-storage properties of graphene nanosheets(GNS), GNS supported Sn-Sb@carbon (50-150 nm) and Sn-Sb nanoparticles (5-10 nm). The best cycling performance and excellent high rate capabilities were observed for GNS-supported Sn-Sb@carbon core-shell particles, which exhibited initial capacities of 978, 850 and 668 mAh/g respectively at 0.1C, 2C and 5C (1C = 800 mA/g) with good cyclability. Besides the GNS support, the carbon skin around Sn-Sb particles is believed to be a key factor to improve electrochemical properties of Sn-Sb. (C) 2010 Elsevier B.V. All rights reserved.
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