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Modified SiO as a high performance anode for Li-ion batteries
- Authors
- Hwa, Yoon; Park, Cheol-Min; Sohn, Hun-Joon
- Issue Date
- 15-Jan-2013
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Lithium ion battery; Anode; Silicon monoxide; Disproportionation reaction
- Citation
- JOURNAL OF POWER SOURCES, v.222, pp 129 - 134
- Pages
- 6
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 222
- Start Page
- 129
- End Page
- 134
- ISSN
- 0378-7753
1873-2755
- Abstract
- 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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