Dielectric behaviour and AC conductivity of LiCF3SO3 doped H-chitosan polymer films

Winie, Tan; Arof, A. K.

doi:10.1007/bf02382816

Cited by 73 publications

(16 citation statements)

References 25 publications

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“…In the OLPT model, the exponent n depends on both frequency and temperature and drops with rising temperature to a minimum value and then increases as temperature rises. In the CBH model that describes charge carrier hops between sites over the potential barrier separating them, n decreases with the increment in temperature [33][34][35].…”

Section: Conductivity Analysismentioning

confidence: 98%

NMR study and electrical properties investigation of Zn2P2O7

Jarboui

Rhaeim

Hlel

et al. 2009

Ionics

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The α-Zn 2 P 2 O 7 compound was obtained by conventional solid-state reaction. The sample was characterized by X-ray powder diffraction, solid state 31 P NMR MAS, and electrical impedance spectroscopy. The solid state 31 P MAS NMR, performed at 121.49 MHz, shows three isotropic resonances at −21.1, −18.8, and −15.8 ppm, confirming the non-equivalency of the three PO 4 groups in the α-Zn 2 P 2 O 7 form. They are characterized by different chemical shift tensor parameters with the local geometrical features of the tetrahedra. Electrical impedance measurements of β-Zn 2 P 2 O 7 , form stable for temperature greater than 403 K, were performed as a function of both temperature and frequency. The electrical conduction and dielectric relaxation have been studied. The AC conductivity obeys the universal power law. The approximation type correlated barrier hopping model explains the universal behavior of the n exponent. The impedance plane plot shows semicircle arcs at different temperatures, and an electrical equivalent circuit has been proposed to explain the impedance results. The circuits consist of the parallel combination of bulk resistance R p and constant phase elements CPE. The simulated spectra show a good correlation with the experimental data.

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Section: Conductivity Analysismentioning

confidence: 98%

NMR study and electrical properties investigation of Zn2P2O7

Jarboui

Rhaeim

Hlel

et al. 2009

Ionics

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“…[38,42] iii. Small-polaron hopping (SPH) model: the exponent s increases with increasing temperature.…”

Section: Conduction Mechanismmentioning

confidence: 99%

“…Generally, σ ac can be analysed at a high frequency region in order to determine the ionic conduction mechanism using Jonscher's universal power law [36][37][38] :…”

Section: Conduction Mechanismmentioning

confidence: 99%

Investigation of the Ionic Conduction Mechanism in Carboxymethyl Cellulose/Chitosan Biopolymer Blend Electrolyte Impregnated with Ammonium Nitrate

Rani

Mohamed

Isa

2015

International Journal of Polymer Analysis and Characterization

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In the present work, an attempt has been made to prepare a new natural biopolymer blend electrolyte of carboxymethyl cellulose/ chitosan impregnated with NH 4 NO 3 by solution cast technique. The conductivity for the system was measured via impedance spectroscopy. The incorporation of 40 wt% NH 4 NO 3 optimized the ambient temperature conductivity of the electrolyte up to 1.03 x 10 -5 S cm -1 . All electrolytes were found to follow Arrhenius relationship. Dielectric studies confirmed that the electrolytes obey non-Debye behavior. The temperature dependence of the power law exponent s for the highest conducting film can be represented by the correlated barrier hopping model.

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“…The increase in n with temperature is also reflected in the increase in the value of dielectric constant with temperature as shown in Figure 4. The dielectric constant is a measure of the number of free ions in a polymer electrolyte system [17].…”

Section: Resultsmentioning

confidence: 99%

Effect of temperature on the transport property of PVdF-HFP-MPII-PC/DME gel polymer electrolytes

Saaid

Rodi

Winie

2017

AIP Conference Proceedings

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Effect of Temperature on the Transport Property of PVdF-HFP-MPII-PC/DME Gel Polymer ElectrolytesAbstract. Gel polymer electrolytes employing the co-polymer poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) as the polymer host were prepared by soaking the PVdF-HFP films in a liquid electrolyte of 1.0M 1-methyl-3-propyl imidazolium iodide (MPII) ionic liquid dissolved in a mixture of propylene carbonate (PC) and 1,2-dimetoxyethane (DME) (v/v=7:3). Conductivity of PVdF-HFP-MPII-PC/DME electrolyte was investigated as a function of temperature. Conductivity enhancement with temperature is attributed to the increase in the number, n and mobility, μ of free ions. The n and μ of free ions have been determined quantitatively by impedance spectroscopy.

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Dielectric behaviour and AC conductivity of LiCF3SO3 doped H-chitosan polymer films

Cited by 73 publications

References 25 publications

NMR study and electrical properties investigation of Zn2P2O7

NMR study and electrical properties investigation of Zn2P2O7

Investigation of the Ionic Conduction Mechanism in Carboxymethyl Cellulose/Chitosan Biopolymer Blend Electrolyte Impregnated with Ammonium Nitrate

Effect of temperature on the transport property of PVdF-HFP-MPII-PC/DME gel polymer electrolytes

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