Solid polymer electrolytes based on gellan gum and ionic liquid for sustainable electrochromic devices
| Autor: | Raquel Alves, Arkaitz Fidalgo-Marijuan, Lia Campos-Arias, Renato Gonçalves, Maria Manuela Silva, Francisco Javier del Campo, Carlos M. Costa, Senentxu Lanceros-Mendez |
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| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
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| Popis: | Materials sustainability is becoming increasingly relevant in every developed technology and, consequently, environmentally friendly solid polymer electrolytes (SPEs) based on gellan gum and different quantities of ionic liquid (IL) 1- Ethyl-3-methyl-imidazolium-thiocyanate [Emim][SCN] have been prepared and applied in electrochromic devices (ECDs). The addition of the IL does not affect the crystalline phase of gellan gum and the samples show a compact morphology, surface uniformity, no phase separation and good distribution of the IL within the carrageenan matrix. The developed SPE are thermally stable up to ~ 100 ºC and show suitable mechanical properties. The most concentrated sample (39 wt.% IL content) reaches a maximum ionic conductivity value of 6.010–3 S cm–1 and 1.810–2 S cm–1 at 30 ºC and 90 ºC, respectively. The electrochromic device (ECD) was fabricated with poly(3,4- ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) as working electrode and the developed SPE was compared with an aqueous 0.1 M KNO3 solution. The electrochromic performance of the electrolyte was assessed in terms of spectroelectrochemistry, demonstrating a fully flexible ECD operating at voltages below 1.0 V. This novel electrolyte opens the door to the preparation of high performance sustainable ECD. Fundação para a Ciência e Tecnologia (FCT): Strategic Funding grants UID/FIS/04650/2021, UID/CTM/50025/2021, and UID/QUI/0686/2021; projects PTDC/FIS-MAC/28157/2017 and POCI-01-0247-FEDER-046985. R. G. and C. M. C. thank the FCT for the contracts under the Stimulus of Scientific Employment: CEECIND/00833/2017 and 2020.04028 CEECIND, respectively. Basque Government for funding under the ELKARTEK program; Basque University System Research Groups, IT-1290-19 and the University of the Basque Country (GIU18/197). L. C. -A. thanks the University of Basque Country (UPV/EHU) for the doctoral grant PIFI20/04 |
| Databáze: | OpenAIRE |
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