Journal
APPLIED SURFACE SCIENCE
Volume 256, Issue 8, Pages 2447-2452Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2009.10.085
Keywords
WO3; Anode materials; Lithium-ion batteries; Magnetron sputtering
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Funding
- Science & Technology Commission of Shanghai Municipality [08DZ2270500, 09JC1401300]
- NSFC [20773031]
- 973 Projects [2007CB209702]
- 863 Projects [2007AA03Z322]
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Nanostructured WO3 thin film has been successfully fabricated by radio-frequency magnetron sputtering method and its electrochemistry with lithium was investigated for the first time. The reversible discharge capacity of WO3/Li cells cycled between 0.01 V and 4.0 V was found above 626 mAh/g during the first 60 cycles at the current density 0.02 mA/cm(2). By using X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and selected-area electron diffraction measurements, the reversible conversion of WO3 into nanosized metal W and Li2O was revealed. The high reversible capacity and good recyclability of WO3 electrode made it become a promising cathode material for future rechargeable lithium batteries. (C) 2009 Elsevier B. V. All rights reserved.
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