Oriented graphenes from plasma-reformed coconut oil for supercapacitor electrodes
Article
Article Title | Oriented graphenes from plasma-reformed coconut oil for supercapacitor electrodes |
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ERA Journal ID | 211126 |
Article Category | Article |
Authors | Kumar, Shailesh (Author), Martin, Phil (Author), Bendavid, Avi (Author), Bell, John (Author) and Ostrikov, Kostya (Ken) (Author) |
Journal Title | Nanomaterials |
Journal Citation | 9 (12) |
Article Number | 1679 |
Number of Pages | 9 |
Year | 2019 |
Publisher | MDPI AG |
Place of Publication | Switzerland |
ISSN | 2079-4991 |
Digital Object Identifier (DOI) | https://doi.org/10.3390/nano9121679 |
Web Address (URL) | https://www.mdpi.com/2079-4991/9/12/1679 |
Abstract | The utilization of vertical graphene nanosheet (VGN) electrodes for energy storage in supercapacitors has long been desired yet remains challenging, mostly because of insufficient control of nanosheet stacking, density, surface functionality, and reactivity. Here, we report a single-step, scalable, and environment-friendly plasma-assisted process for the fabrication of densely packed yet accessible surfaces of forested VGNs (F-VGNs) using coconut oil as precursor. The morphology of F-VGNs could be controlled from a continuous thick structure to a hierarchical, cauliflower-like structure that was accessible by the electrolyte ions. The surface of individual F-VGNs was slightly oxygenated, while their interior remained oxygen-free. The fabricated thick (>10 μm) F-VGN electrodes presented specific capacitance up to 312 F/g at a voltage scan rate of 10 mV/s and 148 F/g at 500 mV/s with >99% retention after 1000 cycles. This versatile approach suggests realistic opportunities for further improvements, potentially leading to the integration of F-VGN electrodes in next-generation energy storage devices. |
Keywords | plasma nanoscience; oriented graphenes; plasma production of nanomaterials |
ANZSRC Field of Research 2020 | 400499. Chemical engineering not elsewhere classified |
Byline Affiliations | Queensland University of Technology |
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia | |
Open access url | https://www.mdpi.com/2079-4991/9/12/1679 |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5x35/oriented-graphenes-from-plasma-reformed-coconut-oil-for-supercapacitor-electrodes
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