Quasi-anhydrous proton conducting di-ureasil hybrid electrolytes incorporating a protic ionic liquid
authors Cardoso, MA; Fernandes, M; Rodrigues, LC; Leones, R; Silva, MM; Bermudez, VD
nationality International
journal ELECTROCHIMICA ACTA
keywords ORGANICALLY MODIFIED SILICATES; FUEL-CELL ELECTROLYTES; MEMBRANES; POLYMERIZATION
abstract A wide range of concentrations of the [EIm][TfO] proton ionic liquid (PIL) were for the first time incorporated into a poly(oxyethyelene) (POE)/siloxane hybrid host matrix (d-U(2000)) belonging to the di-ureasil family. The synthesis procedure adopted, involving the lowest amount of water possible, resulted in the formation of essentially anhydrous electrolytes at certain PIL levels. The optimized sample d-U(2000)/[EIm][TfO] 50 (where 50 represents the ratio in % of the mass of [EIm][TfO] per mass of POE precursor) is amorphous, thermally stable up to 200 degrees C, displays good mechanical properties and exhibits an ionic conductivity of 3.2 x 10(-4) and 4.3 x 10(-3) S cm(-1) at 20 and 186 degrees C, respectively. These features have persisted for more than three years. These new electrolytes appear quite attractive for applications in fuel cells operating under non-humidified conditions. (C) 2014 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0013-4686
year published 2014
volume 147
beginning page 288
ending page 293
digital object identifier (doi) 10.1016/j.electacta.2014.09.125
web of science category Electrochemistry
subject category Electrochemistry
unique article identifier WOS:000346178800037
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