Towards separator-free structural composite supercapacitors
| Autor: | Nikola Todorovic, Alexander Bismarck, Olivier Hubert |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
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) |
| Zdroj: | Composites Science and Technology |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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