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dc.contributor.authorTchalala, Mohammed
dc.contributor.authorEl Demellawi, Jehad K.
dc.contributor.authorAbou-Hamad, Edy
dc.contributor.authorDuran Retamal, Jose Ramon
dc.contributor.authorVaradhan, Purushothaman
dc.contributor.authorHe, Jr-Hau
dc.contributor.authorChaieb, Saharoui
dc.date.accessioned2017-05-31T11:23:09Z
dc.date.available2017-05-31T11:23:09Z
dc.date.issued2017-05-06
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.
dc.identifier.issn2352-9407
dc.identifier.doi10.1016/j.apmt.2017.04.011
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.
dc.description.sponsorshipThe authors would like to thank King Abdullah University of Science and Technology (KAUST) for the financial support.
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S2352940717300318
dc.subjectIonic liquid-nanoparticles hybrids
dc.subjectImidazolium-based ionic liquids
dc.subjectElectrochemical activity
dc.subjectCurrent transport
dc.subjectNanoparticle stability
dc.titleHybrid electrolytes based on ionic liquids and amorphous porous silicon nanoparticles: Organization and electrochemical properties
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentBioscience Program
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentNano Energy Lab
dc.contributor.departmentOffice of the VP
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalApplied Materials Today
dc.contributor.institutionLawrence Berkeley National Laboratory, Chemical Sciences Division, 1 Cyclotron Road, Mailstop 6R-2100, Berkeley, CA 94720, USA
kaust.personTchalala, Mohammed
kaust.personEl Demellawi, Jehad K.
kaust.personAbou-Hamad, Edy
kaust.personDuran Retamal, Jose Ramon
kaust.personVaradhan, Purushothaman
kaust.personHe, Jr-Hau
kaust.personChaieb, Sahraoui
dc.date.published-online2017-05-06
dc.date.published-print2017-12


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