Issue 9, 2019

Three-step-in-one synthesis of supercapacitor MWCNT superparamagnetic magnetite composite material under flow

Abstract

Composites of multi-walled carbon nanotubes (MWCNTs) and superparamagnetic magnetite nanoparticles, Fe3O4@MWCNT, were synthesized in DMF in a vortex fluidic device (VFD). This involved in situ generation of the iron oxide nanoparticles by laser ablation of bulk iron metal at 1064 nm using a pulsed laser, over the dynamic thin film in the microfluidic platform. The overall processing is a three-step in one operation: (i) slicing MWCNTs, (ii) generating the superparamagnetic nanoparticles and (iii) decorating them on the surface of the MWCNTs. The Fe3O4@MWCNT composites were characterized by transmission electron microscopy, scanning transmission electron microscope, TG analysis, X-ray diffraction and X-ray photoelectron spectroscopy. They were used as an active electrode for supercapacitor measurements, establishing high gravimetric and areal capacitances of 834 F g−1 and 1317.7 mF cm−2 at a scan rate of 10 mV s−1, respectively, which are higher values than those reported using similar materials. In addition, the designer material has a significantly higher specific energy of 115.84 W h kg−1 at a specific power of 2085 W kg−1, thereby showing promise for the material in next-generation energy storage devices.

Graphical abstract: Three-step-in-one synthesis of supercapacitor MWCNT superparamagnetic magnetite composite material under flow

Supplementary files

Article information

Article type
Paper
Submitted
02 Jūn. 2019
Accepted
16 Aug. 2019
First published
19 Aug. 2019
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2019,1, 3761-3770

Three-step-in-one synthesis of supercapacitor MWCNT superparamagnetic magnetite composite material under flow

Thaar M. D. Alharbi, A. H. M. Al-Antaki, M. Moussa, W. D. Hutchison and C. L. Raston, Nanoscale Adv., 2019, 1, 3761 DOI: 10.1039/C9NA00346K

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