IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v13y2020i22p6124-d449258.html
   My bibliography  Save this article

Effect of Concentration on the Charge Storage Kinetics of Nanostructured MnO 2 Thin-Film Supercapacitors Synthesized by the Hydrothermal Method

Author

Listed:
  • Aviraj M. Teli

    (Department of Physics, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea)

  • Sonali A. Beknalkar

    (Department of Physics, Shivaji University, Kolhapur 416004, Maharashtra, India)

  • Sachin A. Pawar

    (Department of Physics, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea)

  • Deepak P. Dubal

    (School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), 2 George Street, Brisbane QLD 4001, Australia)

  • Tukaram D. Dongale

    (School of Nanoscience and Biotechnology, Shivaji University, Kolhapur 416004, Maharashtra, India)

  • Dipali S. Patil

    (Department of Physics, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea)

  • Pramod S. Patil

    (Department of Physics, Shivaji University, Kolhapur 416004, Maharashtra, India
    School of Nanoscience and Biotechnology, Shivaji University, Kolhapur 416004, Maharashtra, India)

  • Jae Cheol Shin

    (Department of Physics, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea)

Abstract

In this study, amorphous manganese oxide (MnO 2 ) nanostructured thin films were synthesized by a simple hydrothermal method. It is well known that the nanostructure plays a crucial role in energy storage applications. Herein, MnO 2 nanostructures ranging from plates to flakes were synthesized without the use of any hard or soft templates. The 4+ oxidation state of Mn was confirmed by X-ray photoelectron spectroscopy. The MnO 2 nanoflake structure has a specific surface area of 46 m 2 g −1 , which provides it with an excellent rate capability and an exactly rectangular cyclic voltammogram (CV) curve. The MnO 2 nanoflake electrode has a high specific capacitance of about 433 Fg −1 , an energy density of 60 Whkg −1 at 0.5 mAcm −2 , and an excellent cyclic stability of 95% over 1000 CV cycles in 1 M aq. Na 2 SO 4 . Kinetics analysis of the charge storage in the nanoflake MnO 2 sample shows a 55.6% diffusion-controlled contribution and 44.4% capacitive-controlled contribution to the total current calculated at a scan rate of 100 mVs −1 from the CV curve.

Suggested Citation

  • Aviraj M. Teli & Sonali A. Beknalkar & Sachin A. Pawar & Deepak P. Dubal & Tukaram D. Dongale & Dipali S. Patil & Pramod S. Patil & Jae Cheol Shin, 2020. "Effect of Concentration on the Charge Storage Kinetics of Nanostructured MnO 2 Thin-Film Supercapacitors Synthesized by the Hydrothermal Method," Energies, MDPI, vol. 13(22), pages 1-18, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:22:p:6124-:d:449258
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/13/22/6124/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/13/22/6124/
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:13:y:2020:i:22:p:6124-:d:449258. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.