Self-healable and eco-friendly hydrogels for flexible supercapacitors
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hdl:2117/343788
Tipus de documentArticle
Data publicació2021-03-11
EditorWiley (John Wiley & Sons)
Condicions d'accésAccés obert
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Abstract
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.
CitacióBabeli, I. [et al.]. Self-healable and eco-friendly hydrogels for flexible supercapacitors. "Advanced Sustainable Systems", 11 Març 2021, p. 1-10.
ISSN2366-7486
Versió de l'editorhttps://onlinelibrary.wiley.com/doi/abs/10.1002/adsu.202000273
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Babeli_et_al_rev.docx | 4,165Mb | Microsoft Word 2007 | Visualitza/Obre |