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Facile synthesis of α-MnO2 nanowires/spherical activated carbon composite for supercapacitor application in aqueous neutral electrolyte

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Abstract

One-dimensional (1-D) α-MnO2 nanowires/spherical activated carbon composite, namely the α-MnO2 nanowires growth onto the surface of activated mesocarbon microbeads (a-MCMB), has been prepared by using a simple hydrothermal synthesis method. The α-MnO2 nanowires are found to be less than 50 nm in diameter and have a characteristic length up to 2 μm. The novel α-MnO2 nanowires/a-MCMB composite when used for supercapacitor electrode material exhibits a specific capacitance (C s) of 357 F g−1 in 1 M Na2SO4 aqueous neutral solution. The C s based on the α-MnO2 nanowires is estimated to be as high as 890 F g−1. A good cycling stability of this composite material is also demonstrated for supercapacitor application.

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Acknowledgments

This research was supported by the National Natural Science Foundation of China (21443006), Natural Science Foundation of Guangdong Province (S2013040015162), Guangdong Province and Chinese Academy of Sciences Strategic Cooperative Project (2012B090400003), Science and Technology Project of Maoming (2014006) and Doctor Startup Project of School (513086).

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Authors and Affiliations

  1. Development Center of Technology for Petrochemical Pollution Control and Cleaner Production of Guangdong Universitites, College of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, Guangdong, China

    Zesheng Li, Zhenghui Liu, Dehao Li & Bolin Li

  2. Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry and Chemical Engineering of Guangxi Normal University, Guilin, 541004, Guangxi, China

    Qingyu Li, Youguo Huang & Hongqiang Wang

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  1. Zesheng Li
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  2. Zhenghui Liu
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  3. Dehao Li
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  4. Bolin Li
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  5. Qingyu Li
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  6. Youguo Huang
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  7. Hongqiang Wang
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Correspondence to Zesheng Li or Hongqiang Wang.

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Li, Z., Liu, Z., Li, D. et al. Facile synthesis of α-MnO2 nanowires/spherical activated carbon composite for supercapacitor application in aqueous neutral electrolyte. J Mater Sci: Mater Electron 26, 353–359 (2015). https://doi.org/10.1007/s10854-014-2407-z

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  • DOI: https://doi.org/10.1007/s10854-014-2407-z

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