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|Title:||Gellan gum-Ionic liquid membranes for electrochromic device application|
|Author(s):||Neto, M. J.|
Esperança, J. M. S. S.
Medeiros, Maria José
Bermudez, V. D. Z.
Silva, Maria Manuela
|Journal:||Solid State Ionics|
|Citation:||Neto, M. J., Sentanin, F., Esperanca, J. M. S. S., Medeiros, M. J., Pawlicka, A., Bermudez, V. d. Z., & Silva, M. M. (2015). Gellan gum-Ionic liquid membranes for electrochromic device application. Solid State Ionics, 274, 64-70. doi: 10.1016/j.ssi.2015.02.011|
|Abstract(s):||Biopolymer-based materials have been of particular interest and they are alternatives to synthetic polymers based on the decreasing oil resources. The polymer electrolytes were doped with choline-based IL N,N,Ntrimethyl- N-(2-hydroxyethyl)ammonium bis(trifluoromethylsulfonyl)imide ([N1 1 1 2(OH)][NTf2]), or Er (CF3SO3)3 or both. The polymer electrolytes were employed in the production of glass/ITO/WO3/electrolyte/ CeO2–TiO2/ITO/glass electrochromic devices (ECDs). The lowest onset temperature for the degradation of all the SPEs is at ~130 °C for the Gellan Er (CF3SO3)3 (10:1) this temperature range of stability is wide enough for a material to be applied as an electrolyte/separator component in electrochemical devices. The three ECDs displayed fast switching speed (ca. 15 s). Gellan [N1 1 1 2(OH)][NTf2] Er (CF3SO3)3 (5:1:10) exhibited an electrochromic contrast of 4.2% in the visible region, the coloration efficiency attained at 555 nm was 3.5 and 0.90 cm-2 C-1 in the “colored” and “bleached” states, respectively, and the open circuit memorywas 48 h. Preliminary tests performed with a prototype electrochromic device (ECD) incorporating WO3 as cathodic electrochromic layer, are extremely encouraging.|
|Access:||Restricted access (UMinho)|
|Appears in Collections:||CDQuim - Artigos (Papers)|
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