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Manganese cobalt oxide nanoflakes for electrochemical energy storage

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Abstract

Manganese cobalt oxide (MnCo2O4) nanoflakes are synthesized by a simple hydrothermal process. As a supercapacitor electrode material, MnCo2O4 nanoflake exhibits a specific capacitance of 256 Fg−1 at 5 mV s −1 in symmetric two-electrode configuration. The sample shows an outstanding cyclic stability of 85% retention of specific capacitance after 10,000 charge–discharge cycles at 2 A g−1. The MnCo2O4 nanoflake-based supercapacitor material shows an energy density value of 25 Wh kg −1 at a power density of 1 kW kg −1. The present work establishes the suitability of manganese cobalt oxide nanoflakes for supercapacitor electrodes.

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Acknowledgements

Authors thank the Materials Sciences and Technology Division, CSIR-NIIST for the help in materials characterization and Mr. Kiran Mohan CSIR-NIIST for TEM measurements.

Funding

R.B. Rakhi acknowledges the support of Ramanujan Fellowship, Department of Science and Technology (DST), Govt.of India, and CSIR-NIIST Thiruvananthapuram, India.

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Authors and Affiliations

  1. Department of Physics, University of Kerala, Kariavattom, Thiruvananthapuram, 695581, India

    P. M. Anjana & R. B. Rakhi

  2. Department of Nanoscience and Nanotechnology, University of Kerala, Kariavattom, Thiruvananthapuram, 695581, India

    S. R. Sarath Kumar

  3. Chemical Sciences and Technology Division, CSIR-National Institute of Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, 695019, India

    R. B. Rakhi

Authors
  1. P. M. Anjana
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  2. S. R. Sarath Kumar
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  3. R. B. Rakhi
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Contributions

PMA: Conceptualization, methodology, and investigation. SRS: Writing—reviewing and editing, supervision. RBR: Conceptualization, methodology, writing—reviewing and editing, validation, and supervision.

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Correspondence to S. R. Sarath Kumar or R. B. Rakhi.

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Anjana, P.M., Sarath Kumar, S.R. & Rakhi, R.B. Manganese cobalt oxide nanoflakes for electrochemical energy storage. J Mater Sci: Mater Electron 33, 8484–8492 (2022). https://doi.org/10.1007/s10854-021-06377-5

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  • DOI: https://doi.org/10.1007/s10854-021-06377-5

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