Titel
Towards separator-free structural composite supercapacitors
Abstract
Structural supercapacitors can both carry load and store electrical energy. An approach to build such devices is to modify carbon fibre surfaces to increase their specific surface area and to embed them into a structural electrolyte. We present a way to coat carbon fibres with graphene nanoplatelets by electrophoretic deposition in water. The effect of time and voltage on the mechanical properties of the carbon fibres, the structure of the coating and the specific surface area of the coated carbon fibres are discussed. A specific capacity of 1.44 F/g was reached, which is 130% higher than state-of-the-art structural electrodes. We demonstrate the scalability of the deposition process to continuous production of coated carbon fibres. These carbon fibre electrodes were used to realise large (21 cm long) structural supercapacitor demonstrators without the need for a separator, having a specific capacity of 623 mF/g.
Stichwort
ACarbon fibresMultifunctional compositesBElectro-chemical behaviourMultifunctional propertiesSurface treatments
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:1588415
Erschienen in
Titel
Composites Science and Technology
Band
217
ISSN
0266-3538
Erscheinungsdatum
2022
Publication
Elsevier BV
Erscheinungsdatum
2022
Zugänglichkeit
Rechte
Rechteangabe
© 2021 The Authors
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