Abstract
In this paper, we reported a one-pot method to synthesize MnO/C hybrid microspheres via solvothermal approach for the first time. Only peaks of MnO could be observed from X-ray diffractometry patterns, indicating that the carbon in the composite was amorphous. Scanning electron microscope and transmission electron microscopy images showed that the surfaces of these as-prepared spheres were relatively smooth and of about 2.2 μm in diameter. Electrochemical property demonstrated that the annealed MnO/C hybrid microspheres possessed higher reversible capacity and cycling stability than that of MnO nanoparticles. The annealed MnO/C hybrid microspheres exhibited a large initial charge capacity of 856 mAh g−1, and the stabilized capacity was as high as 601 mAh g−1 after 30 cycles. These improvements can be ascribed to the amorphous carbon, which can enhance the conductivity of MnO, suppress the aggregation of active particles, and increase their structural stability during cycling.
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Acknowledgments
This work was financially supported by the Fundamental Research Funds for the Central Universities (JUSRP11102), the National High-tech R&D Program of China (863 Program) (2012AA030313), A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, the Program for Changjiang Scholars and Innovative Research Team in University (IRT1135), and the Research Fund for the Doctoral Program of Higher Education of China (20090093110004).
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Qiao, H., Yao, D., Cai, Y. et al. One-pot synthesis and electrochemical property of MnO/C hybrid microspheres. Ionics 19, 595–600 (2013). https://doi.org/10.1007/s11581-012-0792-y
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DOI: https://doi.org/10.1007/s11581-012-0792-y