Nano-Fe 3 O 4 /Carbon Nanotubes Composites by One-Pot Microwave Solvothermal Method for Supercapacitor Applications

Sul Ki Park, Jagadeesh Sure, D. Sri Maha Vishnu, Seong Jun Jo, Woo Cheol Lee, Ibrahim A. Ahmad and Hyun-Kyung Kim
Additional contact information
Sul Ki Park: Department of Engineering, University of Cambridge, Cambridge CB3 0FS, UK
Jagadeesh Sure: Department of Physics, School of Advanced Sciences, Vellore Institute of Technology (VIT) University, Vellore TN-632014, India
D. Sri Maha Vishnu: Department of Materials Science and Metallurgy, University of Nizwa, Birkat Al Mouz 616, Nizwa, Oman
Seong Jun Jo: Department of Materials Science and Engineering, Kangwon National University, Chuncheon 24341, Korea
Woo Cheol Lee: Department of Materials Science and Engineering, Kangwon National University, Chuncheon 24341, Korea
Ibrahim A. Ahmad: Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, UK
Hyun-Kyung Kim: Department of Materials Science and Engineering, Kangwon National University, Chuncheon 24341, Korea

Energies, 2021, vol. 14, issue 10, 1-8

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 (Fe 3 O 4 ) 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 Fe 3 O 4 . In this study, we demonstrate the microwave-solvothermal process for the synthesis of Fe 3 O 4 nanoparticles uniformly grown on a CNT composite as an electrode for SCs. The synthesized Fe 3 O 4 /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 (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/14/10/2908/pdf (application/pdf)
https://www.mdpi.com/1996-1073/14/10/2908/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:14:y:2021:i:10:p:2908-:d:556703

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().