Journal
JOURNAL OF POWER SOURCES
Volume 186, Issue 1, Pages 206-210Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2008.09.097
Keywords
Bi; Bi-C composite; Anode; Cycle performance; Lithium battery
Funding
- Korea Science and Engineering Foundation (KOSEF) [R11-2002-102-00000-0]
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Nanostructured Bi/C and Bi/Al2O3/C composites, prepared by high-energy mechanical milling (HEMM), are investigated as anode materials for Li-ion rechargeable batteries. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) reveal that the Bi/C nanocomposite is composed of nano-sized Bi and amorphous C, while the Bi/Al2O3/C nanocomposite (obtained by the mechanochemical reduction of Bi2O3 and At) is composed of nano-sized Bi, amorphous Al2O3, and amorphous C. The electrochemical reaction mechanism of the Bi/C nanocomposite electrode is identified by ex situ XRD analyses combined with a differential capacity plot. Electrochemical tests show that the Bi/C and Bi/Al2O3/C nanocomposites exhibit enhanced electrochemical performances compared with that of the pure Bi electrode. (C) 2008 Elsevier B.V. All rights reserved.
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