Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Communications
Characterization of Heat Treated SiO Powder and Development of a LiFePO4/SiO Lithium Ion Battery with High-Rate Capability and Thermostability
Takuhiro MIYUKIYasue OKUYAMATaichi SAKAMOTOYusuke EDAToshikatsu KOJIMATetsuo SAKAI
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JOURNALS OPEN ACCESS

2012 Volume 80 Issue 6 Pages 401-404

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Abstract

Heat treated SiO in the temperature range of 400 to 1000°C were characterized using XRD and TEM, and their battery performance as an anode material for lithium ion batteries were evaluated in half-cells. A SiO anode using polyimide as binder showed high discharge capacity of 1500 mAh g−1 at the 2nd cycle and excellent cyclability with a capacity retention of 97.8% at the 100th cycle. A lithium ion battery consisting of a LiFePO4 cathode and a SiO anode showed excellent cycle-life (over 600 cycles), high-rate capability, and thermostability in wide temperature range of −30 to 120°C.

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© 2012 The Electrochemical Society of Japan
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