期刊
SOLID STATE IONICS
卷 176, 期 7-8, 页码 693-697出版社
ELSEVIER
DOI: 10.1016/j.ssi.2004.10.017
关键词
cobalt phosphide; lithiation; ball-milling; anode material; lithium ion battery
Cobalt phosphides and lithiated cobalt phosphides are prepared by high-energy ball-milling at room temperature. With increasing the milling time, the phosphide structure is converted from CoP3 to CoP phase. The initial electrochemical lithiation of CoPx (CoP3+CoP) and CoP leads to a reversible capacity of 878 and 533 mAh/g. The faradic yield at the first cycle is about 74% for both the samples. Partial lithiation of the CoPx by ball-milling with Li3N reactant enhances the initial faradic yield to 95%, along with a sacrifice of part of the reversible capacity. The lithiation by thermoreaction, however, results in poor electrochemical performance. (C) 2004 Elsevier B.V. All rights reserved.
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