Ionic conductivity by correlated barrier hopping in NH4I doped chitosan solid electrolyte

Buraidah, M.H.; Teo, L.P.; Majid, S.R.; Arof, A. K.

doi:10.1016/j.physb.2008.12.027

Cited by 227 publications

(116 citation statements)

References 46 publications

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“…As the frequency increases, the dielectric constant begins to decrease and attain a constant value at higher frequencies. This is because the periodic reversal of electric field is so fast that there was no excess ion diffusion in the direction of an electric field [58] and most of the ions are in the bulk of the sample, leading to decrease in the dielectric constant value with increase in frequency [59]. These results imply that PVA/PVP/Li 2 CO 3 polymer blend electrolyte system show a non-Debye type of behaviour where the space charge regions with respect to frequency amorphous and crystalline regions in PVA/PVP matrix which acts as hopping centres for charge carriers.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Impedance spectroscopy, ionic conductivity and dielectric studies of new Li+ ion conducting polymer blend electrolytes based on biodegradable polymers for solid state battery applications

Deshmukh

Ahamed

Polu³

et al. 2016

J Mater Sci: Mater Electron

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New solid polymer blend electrolyte films based on biodegradable polymer blend comprising of polyvinyl alcohol (PVA) and poly (N-vinyl pyrrolidone) (PVP) doped with different wt% of lithium carbonate (Li 2 CO 3 ) salt have been prepared by solution casting method. The resulting PVA/PVP/Li 2 CO 3 polymer blend electrolyte films have been characterized by various analytical techniques such as FTIR, UV-vis, XRD, TGA, polarized optical microscopy and scanning electron microscopy. The FTIR and XRD analysis confirmed the complex formation between PVA/ PVP blend and Li 2 CO 3 salt. The ionic conductivity and the dielectric properties of PVA/PVP/Li 2 CO 3 polymer blend electrolyte films were investigated using an impedance spectroscopy. It was observed that the ionic conductivity of PVA/PVP/Li 2 CO 3 electrolyte system increases as a function of Li 2 CO 3 concentration. The highest ionic conductivity was found to be 1.15 9 10 -5 S cm -1 for polymer blend electrolyte with 20 wt% Li 2 CO 3 content. On the other hand, the dielectric results revealed the non-Debye type of behaviour. The dielectric constant values indicate a strong dielectric dispersion in the studied frequency range which increases as the Li 2 CO 3 content increases. The dielectric constant as high as 1200 (e = 1201.57, 50 Hz, 150°C) and the dielectric loss well below 4 (tan d = 3.94, 50 Hz, 150°C) were obtained for polymer blend electrolytes with 25 wt% Li 2 CO 3 salt. Thus, the results obtained in the present study suggest that the PVA/PVP/ Li 2 CO 3 polymer blend electrolyte system seems to be a promising candidate for solid state battery applications.

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Section: Dielectric Propertiesmentioning

confidence: 99%

Impedance spectroscopy, ionic conductivity and dielectric studies of new Li+ ion conducting polymer blend electrolytes based on biodegradable polymers for solid state battery applications

Deshmukh

Ahamed

Polu³

et al. 2016

J Mater Sci: Mater Electron

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“…One of the most widely explored candidates as a polymer host is the non-toxic, biocompatible, and biodegradable carboxyl methyl cellulose (CMC) which could be dissolved in water for various purposes [10][11][12][13][14][15]. In the present work, the CMC was utilized as a proton-conductor in the SPE system.…”

Section: Introductionmentioning

confidence: 99%

A Study on Dielectric Properties of The Cellulose Derivative-NH4Br-Glycerol- Based The Solid Polymer Electrolyte System

Rasali

Muzakir

Samsudin

2017

MST

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The characterization of biopolymer-based solid polymer electrolytes (SPEs) has been carried out in this present work. Cellulose derivative was chosen due to its superior physical attributes. In this work, NH 4 Br-doped glycerol plasticized carboxyl methylcellulose-based SPEs were successfully prepared via the solution casting method. The conductivity and dielectric properties of the prepared films were investigated using the impedance analysis which presented ~1.91×10 -3 Scm -1 (with addition of 6 wt% of glycerol). In addition, the studied SPE system shows a non-Debye behaviour without a single relaxation time. The findings of the research indicate that the complexes of NH 4 Br and glycerol in the cellulose derivative influence the ionic conductivity and dielectric properties of the SPE system. AbstrakKajian Sifat Dialektik dari Gliserol Turunan Selulosa-NH4Br-Berdasarkan Sistem SPEs. Perkembangan elektrolit polimer pepejal (SPEs) berdasarkan bahan bio-polimer telah dilakukan dalam kajian sekarang ini. Bio-polimer dari turunan selulosa dipilih karena sifatnya yang unggul. Dalam karya sekarang ini, SPEs berdasarkan karboksil metilselulosa didopkan dengan NH 4 Br dan terplastikkan dengan gliserol telah berhasil disiapkan melalui metode tebaran larutan. Sifat unggul film telah diselidiki dalam terma konduktivitas mereka dan juga sifat dielektrik menggunakan teknik impedansi. Nilai ionik tertinggi untuk nilai konduktivitas yang ditemui ialah 1,91 × 10 -3 S cm -1 ketika 6 wt.% gliserol ditambahkan. Sifat dilektrik dari sistem SPEs menunjukkan tren yang signifikan di mana sistem ini secara tepatnya dapat disebut perilaku non-Debye tanpa waktu relaksasi tunggal. Interaksi dari NH 4 Br dan gliserol dalam turunan selulosa telah menunjukkan bahawa ianya mempengaruhi konduktivitas ionik dan sifat dielektrik dalam sistem SPEs.

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“…Chitosan has good film forming ability, porous scaffolds, and hydrogels [8]. Ion-conducting polymer electrolytes based on chitosan have also been reported [9][10][11][12][13][14][15][16]. From the fundamental point of view, ionic conduction in polymer electrolytes is still poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Electrical Conduction Mechanism in Solid Polymer Electrolytes: New Concepts to Arrhenius Equation

Aziz

Abidin

2013

Journal of Soft Matter

109

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Solid polymer electrolytes based on chitosan NaCF 3 SO 3 have been prepared by the solution cast technique. X-ray diffraction shows that the crystalline phase of the pure chitosan membrane has been partially disrupted. The fourier transform infrared (FTIR) results reveal the complexation between the chitosan polymer and the sodium triflate (NaTf) salt. The dielectric constant and DC conductivity follow the same trend with NaTf salt concentration. The increase in dielectric constant at different temperatures indicates an increase in DC conductivity. The ion conduction mechanism follows the Arrhenius behavior. The dependence of DC conductivity on both temperature and dielectric constant ( dc ( , ) = 0 − / ) is also demonstrated.

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Ionic conductivity by correlated barrier hopping in NH4I doped chitosan solid electrolyte

Cited by 227 publications

References 46 publications

Impedance spectroscopy, ionic conductivity and dielectric studies of new Li+ ion conducting polymer blend electrolytes based on biodegradable polymers for solid state battery applications

Impedance spectroscopy, ionic conductivity and dielectric studies of new Li+ ion conducting polymer blend electrolytes based on biodegradable polymers for solid state battery applications

A Study on Dielectric Properties of The Cellulose Derivative-NH4Br-Glycerol- Based The Solid Polymer Electrolyte System

Electrical Conduction Mechanism in Solid Polymer Electrolytes: New Concepts to Arrhenius Equation

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