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Honeycomb-like manganese oxide nanospheres for redox supercapacitors

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Abstract

Honeycomb-like MnO2 nanospheres were synthesized using stainless steel substrates by a facile chemical bath deposition method. The obtained nanospheres were about 200–400 nm in diameter and consisted of porous ultrathin nanosheets. Honeycomb-like MnO2 nanospheres exhibited a high specific capacitance of 240 F g−1 and 87.1% capacitance retention after 1000 cycles at a current density of 0.5 A g−1. These remarkable electrochemical results imply great potential for applications of the honeycomb-like MnO2 nanospheres in supercapacitors.

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Acknowledgements

This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) (NRF2016R1D1A1B03934229) and Hannam University research fund in 2017.

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Authors and Affiliations

  1. Organic Nanomaterials Lab, Department of Chemistry, Hannam University, Daejeon, 305-811, Republic of Korea

    Bal Sydulu Singu, Sang Eun Hong & Kuk Ro Yoon

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  1. Bal Sydulu Singu
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  2. Sang Eun Hong
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  3. Kuk Ro Yoon
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Correspondence to Kuk Ro Yoon.

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Singu, B.S., Hong, S.E. & Yoon, K.R. Honeycomb-like manganese oxide nanospheres for redox supercapacitors. Ionics 24, 523–528 (2018). https://doi.org/10.1007/s11581-017-2218-3

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  • DOI: https://doi.org/10.1007/s11581-017-2218-3

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