Enhancing cyclability and rate performance of Li2MoO4 by carbon coating

High capacity anode material Li2MoO4 powders with and without carbon coating are successfully synthesized via a thermal polymerization method. X-ray diffraction, scanning electron microscopy and transmission electron microscopy are employed to analyze their structures. Galvanostatic cell cycling is...

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Bibliographic Details
Published in:Materials letters 2016-08, Vol.177, p.54-57
Main Authors: Wang, He-Yang, Zou, Bang-Kun, Tang, Zhong-Feng, Wen, Zhao-Yin, Chen, Chun-Hua
Format: Article
Language:English
Subjects:
Carbon
Charge density
Coating
Cycles
Diffraction
Electrochemical analysis
Energy storage and conversion
Lithium ion batteries
Lithium molybdenum oxide
Surfaces
Transmission electron microscopy
X-rays
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Summary:High capacity anode material Li2MoO4 powders with and without carbon coating are successfully synthesized via a thermal polymerization method. X-ray diffraction, scanning electron microscopy and transmission electron microscopy are employed to analyze their structures. Galvanostatic cell cycling is used to compare their electrochemical properties. The carbon-coated Li2MoO4 can deliver charge capacities of 669mAhg−1 and 255mAhg−1 at current densities of 90mAg−1 and 1800mAg−1, respectively, exhibiting much better electrochemical performance than the carbon-free Li2MoO4. •Li2MoO4 is successfully prepared by a thermal polymerization method.•Polyvinyl alcohol is a good carbon source for particle coating.•Carbon coating improves cycle and rate performances of Li2MoO4.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2016.04.162