authors |
Fernandes, TCD; Rodrigues, HMR; Paz, FAA; Sousa, JFM; Valente, AJM; Silva, MM; Bermudez, VD; Pereira, RFP |
nationality |
International |
journal |
JOURNAL OF THE ELECTROCHEMICAL SOCIETY |
keywords |
IONIC-LIQUID; MECHANICAL-PROPERTIES; SCAFFOLDS; FILMS; HEXAFLUOROPHOSPHATE; FABRICATION; CHALLENGES; BATTERIES; MEMBRANES; FIBERS |
abstract |
Green, transparent and flexible electrolyte films composed of a Bombyx mori silk fibroin (SF) host biopolymer doped with glycerol (G), dimethyl sulfoxide (DMSO, D) and 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim]PF6) ionic liquid (IL), were synthesized. The materials were represented by the notation SF@GD@ILx (x = 15, 20 and 30 is the mass ratio of SF/[Bmim]PF6 in %). SF@, SF@G, SF@D and SF@GD samples were also prepared. DMSO was found to play a dual-role, acting as solvent of [Bmim]PF6, and enhancing ionic conductivity. DMSO, alone or combined with [Bmim]PF6, led to the increase of the mean roughness and induced the formation of more ordered Silk II conformations (beta-sheets). No structural modifications were detected in the SF@GD@ILx samples upon increasing the temperature up to 100 degrees C. The highest ionic conductivity was exhibited by the IL-rich sample SF@GD@IL30 (1.07 and 4.61 mS cm(-1), at 22 and 100 degrees C, respectively). In the [Bmim]PF6-doped electrolytes free and coordinated PF6- ions coexist. The weight losses occurring below 200 degrees C involved essentially the release of adsorbed water and DMSO. The suitable mechanical properties, high ionic conductivity and good electrochemical stability suggest that these electrolytes are attractive candidates for application in electrochemical devices. (C) 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited. |
publisher |
ELECTROCHEMICAL SOC INC |
issn |
0013-4651 |
isbn |
1945-7111 |
year published |
2020 |
volume |
167 |
issue |
7 |
digital object identifier (doi) |
10.1149/1945-7111/ab8313 |
web of science category |
Electrochemistry; Materials Science, Coatings & Films |
subject category |
Electrochemistry; Materials Science |
unique article identifier |
WOS:000524001500001
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ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
3.721 |
5 year journal impact factor |
3.719 |
category normalized journal impact factor percentile |
67.989 |
dimensions (citation analysis):
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altmetrics (social interaction):
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