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Ultra-thin and ultra-long α-MnO2 nanowires for pseudocapacitor material

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Abstract

Single phase, ultra-thin, and ultra-long α-MnO2 nanowires were synthesized by facile method and investigated as an electrochemical pseudocapacitor active material. Structural characterizations reveal that the α-MnO2 has a narrow size distribution of ˂5 nm and around 20–30 μm in length. A maximum specific capacitance of 495 F g−1 can be achieved at a scan rate of 2 mV s−1 by cyclic voltametrically. The α-MnO2 nanowires exhibit excellent electrochemical performance at various current densities and good cycling ability. These results indicate that the α-MnO2 nanowires are a promising candidate for the supercapacitor electrode active material.

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Acknowledgments

This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) (NRF-2010-0024478) and Hannam University research fund in 2017.

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Authors and Affiliations

  1. Organic Nanomaterials Laboratory, 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. Ultra-thin and ultra-long α-MnO2 nanowires for pseudocapacitor material. J Solid State Electrochem 21, 3215–3220 (2017). https://doi.org/10.1007/s10008-017-3661-9

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  • DOI: https://doi.org/10.1007/s10008-017-3661-9

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