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di-ureasils incorporating oxyethylene segments with average molecular weights Y = 600 and 900 g mol\u22121, prepared by the sol-gel method, and doped with the ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) and lithium tetrafluoroborate (LiBF4) salt were prepared. The as-obtained films are translucent, flexible, and hydrophobic, and have a low level of nanoscale surface roughness. The ionic conductivity values exhibited by an optimized sample are 8.10 \u00d7 10\u22125 and 2.8 \u00d7 10\u22124 S cm\u22121 at room temperature and 55 \u00b0C, respectively. The main goal of the work was to employ the electrolytes in prototype electrochromic devices (ECDs) with the [glass\/a-IZO\/a-WO3\/d-U(Y)LiBF4-[Bmim]Cl\/c-NiO\/a-IZO\/glass], noted as ECD1 for Y = 600 and ECD2 for Y = 900, where a-WO3 and c-NiO stand for amorphous tungsten oxide and crystalline nickel oxide, respectively. At 555 nm the ECD1 device exhibited the highest coloration efficiency for coloring (CEin = \u2212420.621 cm2\u00b7C\u22121), the highest optical density value (\u2206(OD) = 0.13) and good cycling stability. In this article, the results of a preliminary evaluation of hybrid electrolytes, produced by a sol-gel process, as multi-functional components in prototype electrochromic devices are reported.<\/jats:p>","DOI":"10.3390\/en16010426","type":"journal-article","created":{"date-parts":[[2022,12,30]],"date-time":"2022-12-30T03:19:46Z","timestamp":1672370386000},"page":"426","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Sol-Gel Derived Di-Ureasil Based Ormolytes for Electrochromic Devices"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3398-1488","authenticated-orcid":false,"given":"Paulo Joaquim","family":"Nunes","sequence":"first","affiliation":[{"name":"Department of Chemistry and CQ-VR, University of Tr\u00e1s-os-Montes e Alto Douro (UTAD), 5000-801 Vila Real, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7279-5728","authenticated-orcid":false,"given":"Rui Francisco Pinto","family":"Pereira","sequence":"additional","affiliation":[{"name":"Chemistry Department and Chemistry Centre, University of Minho, 4710-057 Braga, Portugal"}]},{"given":"S\u00f3nia","family":"Pereira","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N, Departamento de Ci\u00eancia dos Materiais, Faculdade de Ci\u00eancias e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5230-639X","authenticated-orcid":false,"given":"Maria Manuela","family":"Silva","sequence":"additional","affiliation":[{"name":"Chemistry Department and Chemistry Centre, University of Minho, 4710-057 Braga, Portugal"}]},{"given":"Elvira","family":"Fortunato","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N, Departamento de Ci\u00eancia dos Materiais, Faculdade de Ci\u00eancias e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7577-4938","authenticated-orcid":false,"given":"Ver\u00f3nica de Zea","family":"Bermudez","sequence":"additional","affiliation":[{"name":"Department of Chemistry and CQ-VR, University of Tr\u00e1s-os-Montes e Alto Douro (UTAD), 5000-801 Vila Real, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6533-4309","authenticated-orcid":false,"given":"Mariana","family":"Fernandes","sequence":"additional","affiliation":[{"name":"Department of Chemistry and CQ-VR, University of Tr\u00e1s-os-Montes e Alto Douro (UTAD), 5000-801 Vila Real, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,30]]},"reference":[{"key":"ref_1","unstructured":"(2022, September 06). 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