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Towards separator-free structural composite supercapacitors
- Source :
- Composites Science and Technology
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
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.
- Subjects :
- Supercapacitor
Materials science
Composite number
Multifunctional composites
General Engineering
Electrolyte
engineering.material
Carbon fibres
Multifunctional properties
Electrophoretic deposition
Coating
Specific surface area
Electrode
Surface treatments
Ceramics and Composites
engineering
Electro-chemical behaviour
Composite material
Separator (electricity)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Composites Science and Technology
- Accession number :
- edsair.doi.dedup.....857a40ebcacda4ed22a3d915b7542153