Abstract
A nano-sized MoO2/C composite was synthesized using a spray pyrolysis technique, and investigated as an anode material for Li-ion batteries. Spherical MoO2/C particles with the monoclinic phase were obtained without any impurities, and with a primary particle size in the range 30–50 nm. Structural variation of the prepared MoO2/C during Li+ insertion was examined by in situ X-ray diffraction and selected area electron diffraction analyses. The structural analysis results indicated that no conversion reaction was activated in the MoO2/C composite. The electrochemical tests demonstrated that the rate-capability and capacity retention of the synthesized materials were improved significantly, which could be attributed to the effective carbon distribution and nano-sized primary particle resulting from the low-synthesis temperature. Therefore, control of the powder morphology and minimization of the primary particle size are found to be essential for achieving the enhanced electrochemical properties in MoO2 anode materials.
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Acknowledgments
This study was supported by the Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant funded by the Korea government Ministry of Knowledge Economy (Project No. 2011201010016B).
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Cho, W., Song, J.H., Kim, JH. et al. Electrochemical characteristics of nano-sized MoO2/C composite anode materials for lithium-ion batteries. J Appl Electrochem 42, 909–915 (2012). https://doi.org/10.1007/s10800-012-0470-9
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DOI: https://doi.org/10.1007/s10800-012-0470-9