Self-healable and eco-friendly hydrogels for flexible supercapacitors
One limitation of wearable electronics, and at the same time a challenge, is the lack of energy storage devices with multiple functionalities produced using clean and environmental-friendly strategies. Here, a multifunctional conductive hydrogel containing poly(3,4-ethylenedioxythiophene) (PEDOT) an...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/343788 |
| Acceso en línea: | https://hdl.handle.net/2117/343788 https://dx.doi.org/10.1002/adsu.202000273 |
| Access Level: | acceso abierto |
| Palabra clave: | Supercapacitors PEDOT:PSS-alginate hydrogel flexibility sustainability self-healing electrochemical supercapacitor Supercondensadors Àrees temàtiques de la UPC::Enginyeria electrònica |
| Sumario: | One limitation of wearable electronics, and at the same time a challenge, is the lack of energy storage devices with multiple functionalities produced using clean and environmental-friendly strategies. Here, a multifunctional conductive hydrogel containing poly(3,4-ethylenedioxythiophene) (PEDOT) and alginate was fabricated, to be used as electrodes in supercapacitors, by applying water-mediated self-assembly and polymerization processes at room temperature. The interpenetration of both polymers allowed combining flexibility and self-healing properties within the same hydrogel together with the intrinsic biocompatibility and sustainability of such materials. Initially, PEDOT : polystyrene sulfonate and alginate aqueous solutions were mixed in two different proportions (1:1 and 1:3) and ionically cross-linked with CaCl2. Subsequently, re-interpenetration of poly(hydroxymethyl-3,4-ethylenedioxythiophene) (PHMeDOT) by anodic polymerization in CaCl2 aqueous solution was achieved. Re-interpenetrated 1:3 PEDOT/alginate hydrogels showed excellent capacitance values (35 mF/cm2) and good capacitance retention. On the other hand, the electrochemical properties were not significantly changed after many cutting/self-healing cycles as was observed by cyclic voltammetry. Therefore, this sustainably produced hydrogel shows promising properties as wearable energy storage devices. |
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