Journal
JOURNAL OF POWER SOURCES
Volume 222, Issue -, Pages 129-134Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2012.08.060
Keywords
Lithium ion battery; Anode; Silicon monoxide; Disproportionation reaction
Funding
- POSCO Chair at the Seoul National University
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An anode material with improved electrochemical performances for Li-ion batteries is prepared using the disproportionation reaction of SiO followed by a high energy mechanical milling process. The modified SiO is composed of embedded Si nano-crystallites in a Si-oxide matrix. Si-oxide matrix could be divided into two parts by reactivity with Li-ion. The inactive Si-suboxide matrix would buffer the volume expansion of embedded Si nano-crystallites and active amorphous SiO2 during the lithiation. This modified SiO electrode shows a large reversible capacity, close to 1000 mAh g(-1), and good cyclability, over 50 cycles. (C) 2012 Elsevier B.V. All rights reserved.
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