Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/39780
Título: | Electrochromic devices incorporating biohybrid electrolytes doped with a lithium salt, an ionic liquid or a mixture of both |
Autor(es): | Fernandes, M. Leones, Rita Daniela Barros Costa, A. M. S. Silva, Maria Manuela Pereira, S. Mano, J. F. Fortunato, E. Rego, R. de Zea Bermudez, V. |
Palavras-chave: | electrochromic devices 1-ethyl-3-methyl imidazolium tetrafluoroborate lithium triflate organic-inorganic biohybrids sol-gel process 1-ethyl-3-methyl imidazolium tetrafluoroborate |
Data: | 2015 |
Editora: | Elsevier 1 |
Revista: | Electrochimica Acta |
Citação: | Fernandes, M., Leones, R., Silva, M. M., Pereira, S., Mano, J. F., Fortunato, E., Rego, R., & de Zea Bermudez, V. (2015). Electrochromic devices incorporating biohybrid electrolytes doped with a lithium salt, an ionic liquid or a mixture of both. Electrochimica Acta, 161, 226-235. doi:10.1016/j.electacta.2015.02.036 |
Resumo(s): | The sol-gel method was employed in the synthesis of di-urethane cross-linked poly( caprolactone) (PCL(530)/siloxane biohybrid ormolytes incorporating either a mixture of lithium triflate (LiCF3SO3) and the ionic liquid (IL) 1-ethyl-3-methyl imidazolium tetrafluoroborate ([Emim]BF4), or solely with [Emim]BF4 or LiCF3SO3. The ormolyte doped with [Emim]BF4 is thermally more stable and exhibits higher ionic conductivity (4 x 10-4 and 2 x 10-3 S cm-1 at 36 and 98 ºC, respectively) than those containing the LiCF3SO3/[Emim]BF4 mixture or just LiCF3SO3. The three ormolytes were employed in the production of glass/ITO/ormolyte/WO3/ITO/glass electrochromic devices (ECDs) designated as ECD@Y with Y = Li-[Emim]BF4, [Emim]BF4 and Li. The three ECDs displayed fast switching speed (ca. 30 s). ECD@Li-[Emim]BF4 exhibited an electrochromic contrast of 18.4 % and an optical density change of 0.11 in the visible region, the coloration efficiency attained at 555 nm was 159 and 80.2 cm-2 C-1 in the “on” and “off” states, respectively, and the open circuit memory was 48 hours. In the “on” state the CIE 1931 color space coordinates were x = 0.29 and y = 0.30, corresponding to blue color. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/39780 |
DOI: | 10.1016/j.electacta.2015.02.036 |
ISSN: | 0013-4686 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | 3B’s - Artigos em revistas/Papers in scientific journals CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Fernandes_et_al-2015-ElectrochimicaActa.pdf Acesso restrito! | 1,24 MB | Adobe PDF | Ver/Abrir |