Effect of IL incorporation on ionic transport in PVdF-HFP-based polymer electrolyte nanocomposite doped with NiBTC-metal-organic framework

Effect of IL incorporation on ionic transport in PVdF-HFP-based polymer electrolyte nanocomposite... Ni-based metal-organic framework (MOF), nickel 1,3,5-benzene tricarboxylate (NiBTC) has been synthesized by solvothermal method and incorporated with ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF ) at varying weight ratios to use as nanofiller in the polymer matrix of poly (vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP). The struc- tural properties of MOF-NiBTC-based composite polymer electrolyte system upon IL incorporation have been investigated by XRD, FTIR, BET, scanning EXAFS and XANES techniques. Shifting of vibrational modes of –COOH groups is observed from FTIR spectra due to strong interaction of Ni metal cluster with BF anion of the IL. Local coordination structure and oscillation periodicity of Ni K-edge are investigated in R-space and k-space from the EXAFS as well as XANES spectra. Asymmetric oscillatory behavior with reduction in coordination number is observed upon IL incorporation due to strong interaction of guest IL with the host MOF-NiBTC. Dielectric relaxation and scaling of AC conductivity have been analyzed in the temperature range of 300–380 K and frequency range of 42 Hz–5 MHz. Non Debye type dielectric relaxation dynamics is observed due to short range hopping of ions. Ion concentration and temperature independent scaling behaviors are followed by the composite polymer −3 −1 electrolyte membranes. Optimum ionic conductivity of http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Solid State Electrochemistry Springer Journals

Effect of IL incorporation on ionic transport in PVdF-HFP-based polymer electrolyte nanocomposite doped with NiBTC-metal-organic framework

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Chemistry; Physical Chemistry; Electrochemistry; Energy Storage; Characterization and Evaluation of Materials; Analytical Chemistry; Condensed Matter Physics
ISSN
1432-8488
eISSN
1433-0768
D.O.I.
10.1007/s10008-018-3999-7
Publisher site
See Article on Publisher Site

Abstract

Ni-based metal-organic framework (MOF), nickel 1,3,5-benzene tricarboxylate (NiBTC) has been synthesized by solvothermal method and incorporated with ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF ) at varying weight ratios to use as nanofiller in the polymer matrix of poly (vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP). The struc- tural properties of MOF-NiBTC-based composite polymer electrolyte system upon IL incorporation have been investigated by XRD, FTIR, BET, scanning EXAFS and XANES techniques. Shifting of vibrational modes of –COOH groups is observed from FTIR spectra due to strong interaction of Ni metal cluster with BF anion of the IL. Local coordination structure and oscillation periodicity of Ni K-edge are investigated in R-space and k-space from the EXAFS as well as XANES spectra. Asymmetric oscillatory behavior with reduction in coordination number is observed upon IL incorporation due to strong interaction of guest IL with the host MOF-NiBTC. Dielectric relaxation and scaling of AC conductivity have been analyzed in the temperature range of 300–380 K and frequency range of 42 Hz–5 MHz. Non Debye type dielectric relaxation dynamics is observed due to short range hopping of ions. Ion concentration and temperature independent scaling behaviors are followed by the composite polymer −3 −1 electrolyte membranes. Optimum ionic conductivity of

Journal

Journal of Solid State ElectrochemistrySpringer Journals

Published: Jun 4, 2018

References

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