Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 36, Issue -, Pages 29-32Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2013.09.004
Keywords
Boron doping; Si-C composite; Rate capability; Anode; Lithium-ion battery
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Funding
- Office of Vehicle Technologies of the U.S. Department of Energy [DE-AC02-05CH11231, 6951378]
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We report a novel strategy to enhance the rate capability of Si-c composite by facile boron doping. Boron doping was confirmed by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The boron-doped Si-C composite shows much improved rate capability, delivering a capacity of 575 mAh/g at 6.4 A/g without any external carbon additive, 80% higher than that of undoped composite. Electrochemical impedance spectroscopy (EIS) measurement shows that boron-doped Si-C composite has lower charge transfer resistance, which helps improve its rate capability. (C) 2013 Elsevier B.V. All rights reserved.
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