Graphite-Mediated Microwave-Exfoliated Graphene Fluoride as Supercapacitor Electrodes

Nanomaterials

Mark Wojcik¹  Marc Dubois²  Hui Zhang³  Xinchen Dai³  Xianjue Chen⁴  Thomas Nann⁵  Nicoloò Canever⁵ 

[1] Allegro Energy Pty Ltd., Newcastle, NSW 2300, Australia;Institut de Chimie de Clermont-Ferrand (ICCF UME 6296), Université Clermont Auvergne, CNRS, 24 av. Blaise Pascal, F-63178 Clermont-Ferrand, France;School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia;School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW 2308, Australia;School of Information and Physical Sciences, The University of Newcastle, Callaghan, NSW 2308, Australia;

关键词: graphene;    graphene fluoride;    microwave;    exfoliation;    supercapacitors;   

DOI  :  10.3390/nano12111796

来源: DOAJ

【 摘 要 】

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 ~60–80 m² g⁻¹, which could be increased by activation using this simple yet versatile microwave-based method for further improvements on the electrochemical performance.

【 授权许可】

Unknown