Functionalized Carbon Nanotube and MnO2 Nanoflower Hybrid as an Electrode Material for Supercapacitor Application

Sagar Mothkuri, Honey Gupta, Pawan K Jain, Tata Narsinga Rao, Gade Padmanabham, Supriya Chakrabarti

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Functionalized carbon nanotube (FCNT) and Manganese Oxide (MnO 2) nanoflower hybrid material was synthesized using hydrothermal technique as a promising electrode material for supercapacitor applications. The morphological investigation revealed the formation of nanoflower like structure of MnO 2 connected with FCNT, thus paving an easy path for the conduction of electrons during the electrochemical mechanism. A significant improvement in capacitance properties was observed in the hybrid material, in which carbon nanotube acts as a conducting cylindrical path, while the major role of MnO 2 was to store the charge, acting as an electrolyte reservoir leading to an overall improved electrochemical performance. The full cell electrochemical analysis of FCNT-MnO 2 hybrid using 3 M potassium hydroxide (KOH) electrolyte indicated a specific capacitance of 359.53 F g-1, specific energy of 49.93 Wh kg-1 and maximum specific power of 898.84 W kg-1 at 5 mV s-1. The results show promise for the future of supercapacitor development based on hybrid electrode materials, where high specific energy can be achieved along with high specific power and long cycle life.

Original languageEnglish
Article number213
Issue number2
Early online date20 Feb 2021
Publication statusPublished (in print/issue) - 20 Feb 2021

Bibliographical note

Funding Information:
Funding: The research was supported by the Centre for Carbon Materials and the Centre for Materials Characterization of International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, P.O. Balapur, Telangana 500005, India.

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.


  • FCNT-MnO2
  • hydrothermal
  • specific energy
  • specific power
  • supercapacitor
  • Specific energy
  • Specific power
  • FCNT-MnO
  • Supercapacitor
  • Hydrothermal


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