Journal
JOURNAL OF POWER SOURCES
Volume 179, Issue 1, Pages 367-370Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2007.12.074
Keywords
high energy ball milling; SiO/graphite composite; anode; li-ion battery
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A new anode composition comprising SiO and graphite(C) is prepared through a high-energy ball milling process. During the first cycle, the anode delivers high discharge and charge capacity values of 1556 and 693 mAh g(-1), respectively. The electrode shows a reversible charge capacity value of 688 mAh g(-1) at the 30th cycle with 99% Coulombic efficiency. X-ray diffraction analysis reveals that ball milling does not produce any new compound, but only causes a reduction in particle size. The irreversible and reversible capacities appear to be interdependent. (C) 2008 Published by Elsevier B.V.
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