Hybrid electrolytes based on ionic liquids and amorphous porous silicon nanoparticles: Organization and electrochemical properties

Handle URI:
http://hdl.handle.net/10754/623843
Title:
Hybrid electrolytes based on ionic liquids and amorphous porous silicon nanoparticles: Organization and electrochemical properties
Authors:
Tchalala, Mohammed; El Demellawi, Jehad K.; Abou-Hamad, Edy; Duran Retamal, Jose Ramon; Varadhan, Purushothaman; He, Jr-Hau ( 0000-0003-1886-9241 ) ; Chaieb, Sahraoui ( 0000-0002-8053-3610 )
Abstract:
Ionic liquids (ILs) and ionic liquid-nanoparticle (IL-NP) hybrid electrolytes have garnered a lot of interest due to their unique properties that stimulate their use in various applications. Herein, we investigate the electrochemical and photo-physical properties of organic-inorganic hybrid electrolytes based on three imidazolium-based ionic liquids, i.e., 1-buthyl-3-methylimidazolium thiocyanate ([bmim] [SCN]), 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim] [BF4]) and 1-buthyl-3-methylimidazolium acetate ([bmim] [Ac]) that are covalently tethered to amorphous porous silicon nanoparticles (ap-Si NPs). We found that the addition of ap-Si NPs confer to the ILs a pronounced boost in the electrocatalytic activity, and in mixtures of ap-Si NPs and [bmim] [SCN], the room-temperature current transport is enhanced by more than 5 times compared to bare [bmim] [SCN]. A detailed structural investigation by transmission electron microscope (TEM) showed that the ap-Si NPs were well dispersed, stabilized and highly aggregated in [bmim] [SCN], [emim] [BF4] and [bmim] [Ac] ILs, respectively. These observations correlate well with the enhanced current transport observed in ap-Si NPs/[bmim] [SCN] evidenced by electrochemical measurements. We interpreted these observations by the use of UV–vis absorbance, photoluminescence (PL), FTIR and solid-state NMR spectroscopy. We found that the ap-Si NPs/[bmim] [SCN] hybrid stands out due to its stability and optical transparency. This behavior is attributed to the iron(III) thiocyanate complexion as per the experimental findings. Furthermore, we found that the addition of NPs to [emim] [BF4] alters the equilibrium of the IL, which consequently improved the stability of the NPs through intermolecular interactions with the two ionic layers (anionic and cationic layers) of the IL. While in the case of [bmim] [Ac], the dispersion of ap-Si NPs was restrained because of the high viscosity of this IL.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC); Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Tchalala MR, El-Demellawi JK, Abou-Hamad E, Retamal JRD, Varadhan P, et al. (2017) Hybrid electrolytes based on ionic liquids and amorphous porous silicon nanoparticles: Organization and electrochemical properties. Applied Materials Today 9: 10–20. Available: http://dx.doi.org/10.1016/j.apmt.2017.04.011.
Publisher:
Elsevier BV
Journal:
Applied Materials Today
Issue Date:
6-May-2017
DOI:
10.1016/j.apmt.2017.04.011
Type:
Article
ISSN:
2352-9407
Sponsors:
The authors would like to thank King Abdullah University of Science and Technology (KAUST) for the financial support.
Additional Links:
http://www.sciencedirect.com/science/article/pii/S2352940717300318
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC); Biological and Environmental Sciences and Engineering (BESE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorTchalala, Mohammeden
dc.contributor.authorEl Demellawi, Jehad K.en
dc.contributor.authorAbou-Hamad, Edyen
dc.contributor.authorDuran Retamal, Jose Ramonen
dc.contributor.authorVaradhan, Purushothamanen
dc.contributor.authorHe, Jr-Hauen
dc.contributor.authorChaieb, Sahraouien
dc.date.accessioned2017-05-31T11:23:09Z-
dc.date.available2017-05-31T11:23:09Z-
dc.date.issued2017-05-06en
dc.identifier.citationTchalala MR, El-Demellawi JK, Abou-Hamad E, Retamal JRD, Varadhan P, et al. (2017) Hybrid electrolytes based on ionic liquids and amorphous porous silicon nanoparticles: Organization and electrochemical properties. Applied Materials Today 9: 10–20. Available: http://dx.doi.org/10.1016/j.apmt.2017.04.011.en
dc.identifier.issn2352-9407en
dc.identifier.doi10.1016/j.apmt.2017.04.011en
dc.identifier.urihttp://hdl.handle.net/10754/623843-
dc.description.abstractIonic liquids (ILs) and ionic liquid-nanoparticle (IL-NP) hybrid electrolytes have garnered a lot of interest due to their unique properties that stimulate their use in various applications. Herein, we investigate the electrochemical and photo-physical properties of organic-inorganic hybrid electrolytes based on three imidazolium-based ionic liquids, i.e., 1-buthyl-3-methylimidazolium thiocyanate ([bmim] [SCN]), 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim] [BF4]) and 1-buthyl-3-methylimidazolium acetate ([bmim] [Ac]) that are covalently tethered to amorphous porous silicon nanoparticles (ap-Si NPs). We found that the addition of ap-Si NPs confer to the ILs a pronounced boost in the electrocatalytic activity, and in mixtures of ap-Si NPs and [bmim] [SCN], the room-temperature current transport is enhanced by more than 5 times compared to bare [bmim] [SCN]. A detailed structural investigation by transmission electron microscope (TEM) showed that the ap-Si NPs were well dispersed, stabilized and highly aggregated in [bmim] [SCN], [emim] [BF4] and [bmim] [Ac] ILs, respectively. These observations correlate well with the enhanced current transport observed in ap-Si NPs/[bmim] [SCN] evidenced by electrochemical measurements. We interpreted these observations by the use of UV–vis absorbance, photoluminescence (PL), FTIR and solid-state NMR spectroscopy. We found that the ap-Si NPs/[bmim] [SCN] hybrid stands out due to its stability and optical transparency. This behavior is attributed to the iron(III) thiocyanate complexion as per the experimental findings. Furthermore, we found that the addition of NPs to [emim] [BF4] alters the equilibrium of the IL, which consequently improved the stability of the NPs through intermolecular interactions with the two ionic layers (anionic and cationic layers) of the IL. While in the case of [bmim] [Ac], the dispersion of ap-Si NPs was restrained because of the high viscosity of this IL.en
dc.description.sponsorshipThe authors would like to thank King Abdullah University of Science and Technology (KAUST) for the financial support.en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S2352940717300318en
dc.subjectIonic liquid-nanoparticles hybridsen
dc.subjectImidazolium-based ionic liquidsen
dc.subjectElectrochemical activityen
dc.subjectCurrent transporten
dc.subjectNanoparticle stabilityen
dc.titleHybrid electrolytes based on ionic liquids and amorphous porous silicon nanoparticles: Organization and electrochemical propertiesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalApplied Materials Todayen
dc.contributor.institutionLawrence Berkeley National Laboratory, Chemical Sciences Division, 1 Cyclotron Road, Mailstop 6R-2100, Berkeley, CA 94720, USAen
kaust.authorTchalala, Mohammeden
kaust.authorEl Demellawi, Jehad K.en
kaust.authorAbou-Hamad, Edyen
kaust.authorDuran Retamal, Jose Ramonen
kaust.authorVaradhan, Purushothamanen
kaust.authorHe, Jr-Hauen
kaust.authorChaieb, Sahraouien
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