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Volume 14
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Communication

Nano-Fe3O4/Carbon Nanotubes Composites by One-Pot Microwave Solvothermal Method for Supercapacitor Applications

by
Sul Ki Park
1,*,
Jagadeesh Sure
2,
D. Sri Maha Vishnu
3,
Seong Jun Jo
4,
Woo Cheol Lee
4,
Ibrahim A. Ahmad
5 and
Hyun-Kyung Kim
4,*
1
Department of Engineering, University of Cambridge, Cambridge CB3 0FS, UK
2
Department of Physics, School of Advanced Sciences, Vellore Institute of Technology (VIT) University, Vellore TN-632014, India
3
Department of Materials Science and Metallurgy, University of Nizwa, Birkat Al Mouz 616, Nizwa, Oman
4
Department of Materials Science and Engineering, Kangwon National University, Chuncheon 24341, Korea
5
Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, UK
*
Authors to whom correspondence should be addressed.
Energies 2021, 14(10), 2908; https://doi.org/10.3390/en14102908
Submission received: 31 March 2021 / Revised: 4 May 2021 / Accepted: 12 May 2021 / Published: 18 May 2021
(This article belongs to the Special Issue Supply of Materials for Energy Storage Devices)
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Abstract

Carbon nanotubes (CNTs) are being increasingly studied as electrode materials for supercapacitors (SCs) due to their high electronic conductivity and chemical and mechanical stability. However, their energy density and specific capacitance have not reached the commercial stage due to their electrostatic charge storage system via a non-faradic mechanism. Moreover, magnetite (Fe3O4) exhibits higher specific capacitance originating from its pseudocapacitive behaviour, while it has irreversible volume expansion during cycling. Therefore, a very interesting and facile strategy to arrive at better performance and stability is to integrate CNTs and Fe3O4. In this study, we demonstrate the microwave-solvothermal process for the synthesis of Fe3O4 nanoparticles uniformly grown on a CNT composite as an electrode for SCs. The synthesized Fe3O4/CNT composite delivers a reversible capacitance of 187.1 F/g at 1 A/g, superior rate capability by maintaining 61.6% of 10 A/g (vs. 1 A/g), and cycling stability of 80.2% after 1000 cycles at 1 A/g.
Keywords: supercapacitor; carbon nanotube; iron oxide; microwave-solvothermal process; composite supercapacitor; carbon nanotube; iron oxide; microwave-solvothermal process; composite

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MDPI and ACS Style

Park, S.K.; Sure, J.; Vishnu, D.S.M.; Jo, S.J.; Lee, W.C.; Ahmad, I.A.; Kim, H.-K. Nano-Fe3O4/Carbon Nanotubes Composites by One-Pot Microwave Solvothermal Method for Supercapacitor Applications. Energies 2021, 14, 2908. https://doi.org/10.3390/en14102908

AMA Style

Park SK, Sure J, Vishnu DSM, Jo SJ, Lee WC, Ahmad IA, Kim H-K. Nano-Fe3O4/Carbon Nanotubes Composites by One-Pot Microwave Solvothermal Method for Supercapacitor Applications. Energies. 2021; 14(10):2908. https://doi.org/10.3390/en14102908

Chicago/Turabian Style

Park, Sul Ki, Jagadeesh Sure, D. Sri Maha Vishnu, Seong Jun Jo, Woo Cheol Lee, Ibrahim A. Ahmad, and Hyun-Kyung Kim. 2021. "Nano-Fe3O4/Carbon Nanotubes Composites by One-Pot Microwave Solvothermal Method for Supercapacitor Applications" Energies 14, no. 10: 2908. https://doi.org/10.3390/en14102908

APA Style

Park, S. K., Sure, J., Vishnu, D. S. M., Jo, S. J., Lee, W. C., Ahmad, I. A., & Kim, H.-K. (2021). Nano-Fe3O4/Carbon Nanotubes Composites by One-Pot Microwave Solvothermal Method for Supercapacitor Applications. Energies, 14(10), 2908. https://doi.org/10.3390/en14102908

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