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Flexible Graphene/Carbon Nanotube Electrochemical Double-Layer Capacitors with Ultrahigh Areal Performance.
- Source :
-
ChemPlusChem . Jul2019, Vol. 84 Issue 7, p882-892. 11p. - Publication Year :
- 2019
-
Abstract
- The fabrication of electrochemical double-layer capacitors (EDLCs) with high areal capacitance relies on the use of elevated mass loadings of highly porous active materials. Herein, we demonstrate a high-throughput manufacturing of graphene/carbon nanotubes hybrid EDLCs. The wet-jet milling (WJM) method is exploited to exfoliate the graphite into single-few- layer graphene flakes (WJM-G) in industrial volumes (production rate ca. 0.5 kg/day). Commercial single-/double-walled carbon nanotubes (SDWCNTs) are mixed with graphene flakes in order to act as spacers between the flakes during their film formation. The WJM-G/SDWCNTs films are obtained by one-step vacuum filtration of the material dispersions, resulting in self-standing, metal- and binder-free flexible EDLC electrodes with high active material mass loadings up to around 30 mgcm-2. The corresponding symmetric WJM-G/SDWCNTs EDLCs exhibit electrode energy densities of 539 μWhcm-2 at 1.3 mWcm-2 and operating power densities up to 532 mWcm-2 (outperforming most of the reported EDLC technologies). The EDCLs show excellent cycling stability and outstanding flexibility even in highly folded states (up to 180°). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21926506
- Volume :
- 84
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- ChemPlusChem
- Publication Type :
- Academic Journal
- Accession number :
- 137367326
- Full Text :
- https://doi.org/10.1002/cplu.201900235