Journal
NANOMATERIALS
Volume 12, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/nano12111796
Keywords
graphene; graphene fluoride; microwave; exfoliation; supercapacitors
Categories
Funding
- Australian Research Council [DE180100294]
- I-SiteCAP2025, Universite Clermont Auvergne
- Clermont AuvergneMetropole via the Academie CAP20-25
- Australian Research Council [DE180100294] Funding Source: Australian Research Council
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A microwave-mediated strategy was used to quickly exfoliate graphite fluoride and obtain exfoliated materials based on density difference. The exfoliated graphene fluoride had good electrical conductivity and its electrochemical performance could be further improved by activation.
A graphite-mediated microwave-based strategy was used for solid-state exfoliation of graphite fluoride in a few seconds, followed by a simple yet efficient separation to obtain exfoliated materials based on the density difference between graphite and graphene fluoride in solvent. The microwave-exfoliated graphene fluoride was a few layers thick and electrically conductive. The electrochemical testing of pouch-cell supercapacitors assembled by using the exfoliated graphene fluoride electrodes and a novel microemulsion-based electrolyte showed reasonable performance with typical electrical double-layer capacitance behavior and good rate capability (gravimetric specific capacitance: 3.2 F g(-1) at 500 mA g(-1) and 3.1 F g(-1) at 5000 mA g(-1)). The BET specific surface areas of the as-exfoliated graphene fluoride are similar to 60-80 m(2) g(-1), which could be increased by activation using this simple yet versatile microwave-based method for further improvements on the electrochemical performance.
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