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TitleDi-ureasil hybrid electrolytes incorporating a new proton ionic liquid
Author(s)Cardoso, Marita A.
Leones, Rita Daniela Barros
Rodrigues, Luísa Cidália Guimarães
Fernandes, Mariana
Figueiredo, Filipe L.
Nunes, Sílvia C.
Silva, Maria Manuela
de Zea Bermudez, Verónica
KeywordsEletrólitos poliméricos
Líquidos iónicos
di - ureasil hybrid
N - butylimidazolium trifluoromethanesulfonate protic ionic liquid
Fuel cell
conducting materials
di-ureasil hybrids
fuel cells
ionic liquids
Issue dateMay-2016
PublisherWiley-VCH Verlag
CitationCardoso, M. A., Leones, R., Rodrigues, L., Fernandes, M., Figueiredo, F. L., Nunes, S. C., ... & De Zea Bermudez, V. C. (2016). Di‐ureasil hybrid electrolytes incorporating a new proton ionic liquid. ChemElectroChem
Abstract(s)The protic ionic liquid (PIL) N-butylimidazolium trifluoromethanesulfonate ([BIm][TfO]) was obtained for the first time and incorporated into a sol-gel derived di-ureasil matrix with a concentration of X = 5, 10 and 30 %, where X is the ratio of the mass of PIL per mass of poly(oxyethylene) (POE). Four years after their synthesis, the resulting quasi-anhydrous electrolytes remained amorphous, homogeneous, flexible and thermally stable below 200 ºC. SEM/EDS data revealed the presence of the PIL at the surface of the xerogels with X > 5 %, demonstrating that this type of morphological characterization is mandatory to avoid misleading ionic conductivity values. The highest ionic conductivity was produced in the washed sample with X = 30 % (3.5 x10-5 and 2.1x10-3 S cm-1 at 25 and 170 ºC, respectively). The present family of electrolytes yielded higher conductivities than the N-ethylimidazolium trifluoromethanesulfonate-based analogues introduced earlier by our group and may be thus considered as promising candidates for applications in fuel cells.
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Appears in Collections:CDQuim - Artigos (Papers)

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