AC conductivity and scaling studies of polycrystalline SnF2

Patro, L.N.; Hariharan, K.

doi:10.1016/j.matchemphys.2009.02.056

Cited by 63 publications

(24 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…KSn 2 F 5 exhibits a superionic phase transition around 428 K associated with the reduction of the unit cell from Z = 3 to Z = 1 [5]. The present work is in continuation of our earlier work on ac conductivity and scaling studies of polycrystalline SnF 2 [6]. In this paper, we present the results obtained from the systematic investigation of (i) SnF 2 doped with KF of various concentrations (0 x 0.1), (ii) KSn 2 F 5 (x = 0.33) and (iii) KSnF 3 (x = 0.5), using X-ray diffraction (XRD), differential scanning calorimetry (DSC), high resolution TEM (HR-TEM) and impedance spectroscopy.…”

Section: Introductionsupporting

confidence: 56%

Ionic transport studies in Sn(1−x)KxF(2−x) type solid electrolytes

Patro

Hariharan

2012

Materials Research Bulletin

Self Cite

View full text Add to dashboard Cite

Section: Introductionsupporting

confidence: 56%

Ionic transport studies in Sn(1−x)KxF(2−x) type solid electrolytes

Patro

Hariharan

2012

Materials Research Bulletin

Self Cite

View full text Add to dashboard Cite

“…The M * representation is now widely used to analyze ionic conductivities by associating a conductivity relaxation time with the ionic process [22]. From Figure 3, it is obvious that at lower frequencies M′ values are very small, tend to be zero indicating the removal of electrode polarization, [23,24] while the increase of M′ with increasing frequency and reaching a maximum value M ∞ at high frequency, may be due to the distribution of relaxation processes over a range of frequencies [25]. The observed dispersion is mainly due to conductivity relaxation spreading over a range of frequencies and indicates the presence of a relaxation time, which should be accompanied by a loss peak in the diagram of the imaginary part of electric modulus versus frequency.…”

Section: Frequency Dependence Of M′ ′ and M″ ″ At Selected Temperaturesmentioning

confidence: 99%

Influence of silver ion reduction on electrical modulus parameters of solid polymer electrolyte based on chitosan-silver triflate electrolyte membrane

Aziz¹,

Abidin²,

Arof³

2010

Express Polym. Lett.

186

View full text Add to dashboard Cite

Abstract. The electric modulus properties of solid polymer electrolyte based on chitosan: AgCF3SO3 from 303 to 393 K have been investigated by using impedance spectroscopy. The shift of the M″ peak spectra with frequeny depends on the dissociation and association of ions. The lowest conductivity relaxation time τσ, was found for the sample with the highest conductivity. The real part of electrical modulus shows that the material is highly capacitive. The asymmetric peak of the imaginary part of electric modulus M″, predicts a non Debye type relaxation. The distribution of relaxation times was indicated by a deformed arc form of Argand plot. The increase of M′ and M″ values above 358 K can be attributed to the transformation of silver ions to silver nanoparticles. The complex impedance plots and ultraviolet-visible (UV-vis) absorption spectroscopy indicate the temperature dependent of silver nanoparticles in chitosan-silver triflate solid electrolyte. The formation of silver nanoparticles was confirmed by transmission electron microscopy (TEM). The scaling behavior of M″ spectra shows that the dynamical relaxation processes is temperature independent for aparticular composition. The β exponent value indicate that the conductivity relaxation is highly non exponential.

show abstract

“…The scaled conductivity spectra, with respect to salt concentration and temperature, collapsed into a single master curve including UPL as well as SLPL region. It indicates that all these ion dynamics have the same origin [28][29][30][31][32]. The successful scaling indicates that ion dynamics in the present case is a thermally inactive phenomenon.…”

Section: Scaling the Ac Conductivitymentioning

confidence: 51%

Ion dynamics and relaxation behavior of NaPF6-doped polymer electrolyte systems

Srivastava

Kumar

2016

J Solid State Electrochem

View full text Add to dashboard Cite

The present paper discusses the ion dynamics of a novel polymeric system prepared by doping of NaPF 6 in a labprepared polymer matrix. Ion dynamics of the system is analyzed by presenting the impedance data in different formalisms. Mobility (and hence the conductivity) continuously increases with salt concentration, and the phenomenon is correlated with salt's plasticization nature, which is reconfirmed by the shifting of minima in ∂logε′/∂logω vs. logω curve towards high frequency. It has been observed that number of charge carriers (N′) estimated from conductivity data do not represent the real charge concentration in the system. Within the experimental frequency (∼MHz) range, three different regions are identified in ∂logσ vs. ∂logω curves namely (i) dc conductivity/free hopping, (ii) correlated ion hopping, and (iii) caged movement of ions. In the present case, also a scaled master conductivity curve is obtained by estimating the σ 0 and ω p (exclusively in Jonscher Power Law or JPL region) according to our previously proposed method. Scaling is realized with respect to salt concentration and temperature, which is an indication that salt concentration and temperature are only governing the number of charge carriers and mobility without affecting the underlying ion transport mechanism. NonDebye-type relaxation phenomenon is indicated by KWW exponent β (<1). Relaxation times, obtained from tanδ vs. logω curves, inversely follow the conductivity, indicating strongly correlated ion-polymer segmental motions.

show abstract

AC conductivity and scaling studies of polycrystalline SnF2

Cited by 63 publications

References 22 publications

Ionic transport studies in Sn(1−x)KxF(2−x) type solid electrolytes

Ionic transport studies in Sn(1−x)KxF(2−x) type solid electrolytes

Influence of silver ion reduction on electrical modulus parameters of solid polymer electrolyte based on chitosan-silver triflate electrolyte membrane

Ion dynamics and relaxation behavior of NaPF6-doped polymer electrolyte systems

Contact Info

Product

Resources

About