Abstract
We have developed hollow MnO/C composite by using impregnation method and followed by heat treatment. One dimensional hollow MnO nanotubes are dispersed inside the partially graphited carbon matrix. As an anode for Li-ion batteries, the well-designed hollow MnO/C composite deliver a reversible capacity of 680.7 mAh g−1 at 0.2 A g−1 after 190 cycles. After 180 cycles at varied current densities from 0.2 to 2 A g−1, this anode still delivered a high discharge capacity of 476.9 mAh g−1 and nearly 100 % coulombic efficiency. We also have experimentally realized a maximal discharge specific energy of 425 Wh kg−1. The well-designed hollow hybrid structure assists in overcoming the issues associated with using manganese oxide in Li-ion batteries, such as poor electric conductivity, volumetric expansion and structural instability during the electrochemical process. Such hollow MnO/C composite could be used as a class of electrode materials for developing high performance Li-ion batteries.
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Acknowledgments
We thank Natural Science Foundation of China (Grant Nos. 51172132, 51272144, 51472127) for the technological support. We also thank the Project Supported by the Key Laboratory of Pulp and Paper Science & Technology of Minstry of Education of China.
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Zhang, S., He, W., Zhang, X. et al. Rational design of carbon-coated hollow MnO nanotubes for Li-ion batteries. J Mater Sci: Mater Electron 26, 2189–2197 (2015). https://doi.org/10.1007/s10854-015-2666-3
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DOI: https://doi.org/10.1007/s10854-015-2666-3