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Synthesis and capacitive property of δ-MnO2 with large surface area

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Abstract

δ-MnO2 with layered structure is synthesized in a mixed system of KMnO4 and C3H6O (epoxypropane) by a facile low-temperature hydrothermal method at 90 °C for 24 h. The obtained product is characterized by X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and N2 adsorption–desorption, and its electrochemical property was investigated by cyclic voltammetry method. Experiment results show that the as-synthesized product has a layered structure and a high specific surface area of 188 m2 g−1, and C3H6O existing in the reaction system plays a crucial role for the formation of δ-MnO2 particles. Electrochemical characterization indicates that the prepared material exhibits an ideal capacitive behavior with the initial capacitance value of 296 F g−1 in 1 mol L−1 Na2SO4 aqueous solution at a scan rate of 5 mV s−1 and good cycling behavior.

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Acknowledgements

We thank National Natural Science Foundation of China (20971082) and the Natural Science Key Foundation of Shaanxi Province (2011JZ001) for financial support for this research.

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Authors and Affiliations

  1. Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Normal University, Ministry of Education, Xi’an, 710062, People’s Republic of China

    Xin Zhang, Xiaopei Chang, Na Chen, Kuan Wang, Liping Kang & Zong-huai Liu

  2. School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, 710062, Shaanxi, People’s Republic of China

    Xin Zhang, Xiaopei Chang, Na Chen, Kuan Wang, Liping Kang & Zong-huai Liu

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  1. Xin Zhang
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  2. Xiaopei Chang
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  3. Na Chen
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  4. Kuan Wang
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  5. Liping Kang
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  6. Zong-huai Liu
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Corresponding author

Correspondence to Zong-huai Liu.

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10853_2011_5879_MOESM1_ESM.tif

Figure S1. SEM images of the obtained materials at different epoxypropane concentrations: a 0 mol L−1, b 0.2 mol L−1, c 0.4 mol L−1, and d 0.6 mol L−1. (TIFF 247 kb)

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Zhang, X., Chang, X., Chen, N. et al. Synthesis and capacitive property of δ-MnO2 with large surface area. J Mater Sci 47, 999–1003 (2012). https://doi.org/10.1007/s10853-011-5879-8

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  • DOI: https://doi.org/10.1007/s10853-011-5879-8

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