Impedance and modulus spectroscopy of poly(vinyl alcohol)-Mg[ClO4]2 salt hybrid films

Khalil, Reda

doi:10.1007/s00339-017-1026-y

Cited by 31 publications

(9 citation statements)

References 37 publications

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“…Complex impedance analysis of the samples examined can be performed according to Khalil 68 :

Z^{*} = Z^{'} - i Z^{″} = \frac{1}{iω ε_{o} ε^{*}}

where Z ′ and Z ″ are the complex impedance real and imaginary components, respectively.…”

Section: Resultsmentioning

confidence: 99%

IncorporatedTiO₂nanoparticles intoPVC/PMMApolymer blend for enhancing the optical and electrical/dielectric properties: Hybrid nanocomposite films for flexible optoelectronic devices

Al‐Muntaser,

Abo‐Dief,

Tarabiah

et al. 2023

Polymer Engineering & Sci

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In the present work, sol–gel‐synthesized titanium oxide nanoparticles (TiO2 NPs) were added to polyvinyl chloride (PVC) and polymethyl methacrylate (PMMA) to create polymer nanocomposites (PNCs) samples. The preparation was carried out via the solution casting method. The synthesized TiO2 NPs have a tetragonal anatase phase and an average grain size of 15.7 nm. XRD analysis reveals that the TiO2 NPs' addition to PVC/PMMA causes a decrease in the crystallinity of PNCs films. Infrared Fourier analysis demonstrated the interplay/complexity between the PVC/PMMA blend and TiO2 NPs. The UV/visible spectrum of the PVC/PMMA blend showed two absorbance peaks at 278 and 208 nm, which may result from the n → π* and π → π* transitions. Also, optical bandgaps for indirect and direct allowed transitions decreased with increasing TiO2 NPs concentration. The samples' AC electrical conductivity and dielectric properties were measured at room temperature. As the TiO2 NPs content in the nanocomposite rises, a percolating network begins to emerge inside the composite, demonstrating that AC electrical conductivity obeys Jonscher's law. Additionally, it has been demonstrated that nanoparticle concentration leads to a higher composite dielectric loss and dielectric constant. These findings suggest the possibility of using the prepared nanocomposites in capacitive energy storage and optoelectronic devices.Highlights PVC/PMMA‐TiO2 nanocomposites' films were fabricated via the solution casting method. Adding TiO2 NPs to PVC/PMMA reduces the crystallinity of the PNCs films. The allowed direct and indirect bandgaps decreased with rising TiO2 NPs content. AC conductivity, impedance, and dielectric characteristics were discussed. The findings indicate the use of prepared samples in optoelectronic devices.

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“…Complex impedance analysis of the samples examined can be performed according to Khalil 68 :

Z^{*} = Z^{'} - i Z^{″} = \frac{1}{iω ε_{o} ε^{*}}

where Z ′ and Z ″ are the complex impedance real and imaginary components, respectively.…”

Section: Resultsmentioning

confidence: 99%

IncorporatedTiO₂nanoparticles intoPVC/PMMApolymer blend for enhancing the optical and electrical/dielectric properties: Hybrid nanocomposite films for flexible optoelectronic devices

Al‐Muntaser,

Abo‐Dief,

Tarabiah

et al. 2023

Polymer Engineering & Sci

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“…The M * formalism is useful when localized relaxation dominates capacitive and/or resistive analysis, whereas the Z * formalism is preferred when long-range conduction dominates. The complex impedance can be calculated using eq Z * = Z ′ − i Z ″ = 1 i ω ε 0 ε * where Z ′ and Z ″ denote the real and imaginary parts of complex impedance, respectively, ε 0 represents the vacuum permittivity, and ε* denotes the complex dielectric permittivity.…”

Section: Resultsmentioning

confidence: 99%

High-Temperature Dielectric Relaxation and Electric Conduction Mechanisms in a LaCoO₃-Modified Na_0.5Bi_0.5TiO₃ System

Singh

Kaur

et al. 2023

ACS Omega

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This research study examines the high-temperature dielectric relaxation and electric conduction mechanisms in (x)LaCoO3-(1 – x)Na0.5Bi0.5TiO3 samples, where x is 0.05, 0.10, and 0.15. The findings demonstrate that all the samples exhibit two dielectric transitions: first, a frequency-dispersive shoulder at a lower temperature (T s) around 425–450 K, which is associated with polar nanoregions (PNRs), and second, from ferroelectric to paraelectric transition at the Curie temperature (T c) approximately between 580 and 650 K. The impedance analysis reveals the negative temperature coefficient of resistance behavior of the specimens. The broad and asymmetric relaxation peaks obtained from modulus spectroscopy demonstrate a wide range of relaxations, suggesting non-Debye-type behavior. Furthermore, the conductivity studies provide insights into understanding the transport phenomena in the samples. The oxygen vacancies resulting from the addition of LaCoO3 into the Na0.5Bi0.5TiO3 ceramics are responsible for the relaxation and conduction processes, and the charge carrier is doubly ionized oxygen ion vacancies. All samples except for LCNBT10 at 1 kHz exhibit a negative magnetodielectric response.

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“…The ionic conductivity increases with GdCl 3 concentration, attributing to the presence of amorphous phase in polymer electrolyte film by the enhancement of mobile charge carriers. The ionic conductivity value of 20 mol% GdCl 3 doped PEO film is two orders of magnitude larger than the value of Gd doped Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 NASICON type solid electrolyte reported by Mingxia Fan el [8] and many orders of magnitude higher than those reported on the other polymer blend electrolytes [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23].It confirms that trivalent Gd 3+ ion is the promising candidate as the dopant to improve the ionic conductivity of PEO polymer.…”

Section: Fig 7 Room Temperature Complex Impedance Plots Of Peo and Gd...mentioning

confidence: 88%

“…The suppression of crystallinity of polymer chains improves the polymer chain mobility, which, in turn, leads to better ionic conduction. The physical properties of polymer electrolytes can be modified by the addition of the migrating ion species depending on their reactivity with the host matrix [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21].Until recently most of the migrating ion species had been only limited to mono-and divalent ions, and some of them have been already brought to the market in many industrial fields. In this regard, a target for the next generation is to develop a trivalent ion conducting electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Structural, optical and electrical properties of anhydrous GdCl3 doped PEO polymer electrolyte films

Arasakumari¹

2022

JOR

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GdCl3 doped PEO polymer electrolyte films were prepared using solution casting technique. XRD patterns, FTIR spectra and optical absorption studies confirm an amorphous nature and the formation of the polymer electrolyte films. The ionic conductivity increases with the GdCl3 content and the maximum value at room temperature is about 1.8310-2 S/cm for 20 mol% GdCl3doped PEO film. This value is more than two orders of magnitude larger than the ionic conductivity of NASICON type Gd-doped solid electrolytes and other polymer electrolytes. The results suggest that the Gd3+ doped PEO polymer electrolyte films are good candidates for future electrochemical devices.

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Impedance and modulus spectroscopy of poly(vinyl alcohol)-Mg[ClO4]2 salt hybrid films

Cited by 31 publications

References 37 publications

IncorporatedTiO₂nanoparticles intoPVC/PMMApolymer blend for enhancing the optical and electrical/dielectric properties: Hybrid nanocomposite films for flexible optoelectronic devices

IncorporatedTiO₂nanoparticles intoPVC/PMMApolymer blend for enhancing the optical and electrical/dielectric properties: Hybrid nanocomposite films for flexible optoelectronic devices

High-Temperature Dielectric Relaxation and Electric Conduction Mechanisms in a LaCoO₃-Modified Na_0.5Bi_0.5TiO₃ System

Structural, optical and electrical properties of anhydrous GdCl3 doped PEO polymer electrolyte films

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Impedance and modulus spectroscopy of poly(vinyl alcohol)-Mg[ClO4]2 salt hybrid films

Cited by 31 publications

References 37 publications

IncorporatedTiO2nanoparticles intoPVC/PMMApolymer blend for enhancing the optical and electrical/dielectric properties: Hybrid nanocomposite films for flexible optoelectronic devices

IncorporatedTiO2nanoparticles intoPVC/PMMApolymer blend for enhancing the optical and electrical/dielectric properties: Hybrid nanocomposite films for flexible optoelectronic devices

High-Temperature Dielectric Relaxation and Electric Conduction Mechanisms in a LaCoO3-Modified Na0.5Bi0.5TiO3 System

Structural, optical and electrical properties of anhydrous GdCl3 doped PEO polymer electrolyte films

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Product

Resources

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IncorporatedTiO₂nanoparticles intoPVC/PMMApolymer blend for enhancing the optical and electrical/dielectric properties: Hybrid nanocomposite films for flexible optoelectronic devices

IncorporatedTiO₂nanoparticles intoPVC/PMMApolymer blend for enhancing the optical and electrical/dielectric properties: Hybrid nanocomposite films for flexible optoelectronic devices

High-Temperature Dielectric Relaxation and Electric Conduction Mechanisms in a LaCoO₃-Modified Na_0.5Bi_0.5TiO₃ System