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

Energies

SulKi Park¹  Hyun-Kyung Kim²  SeongJun Jo²  WooCheol Lee²  IbrahimA. Ahmad³  D.Sri Maha Vishnu⁴  Jagadeesh Sure⁵ 

[1] Department of Engineering, University of Cambridge, Cambridge CB3 0FS, UK;Department of Materials Science and Engineering, Kangwon National University, Chuncheon 24341, Korea;Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, UK;Department of Materials Science and Metallurgy, University of Nizwa, Birkat Al Mouz 616, Nizwa, Oman;Department of Physics, School of Advanced Sciences, Vellore Institute of Technology (VIT) University, Vellore TN-632014, India;

关键词: supercapacitor;    carbon nanotube;    iron oxide;    microwave-solvothermal process;    composite;   

DOI  :  10.3390/en14102908

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown