Improved analysis of ionic conductivity relaxation using the electric modulus with a Cole–Davidson distribution

1990 ◽  
Vol 68 (10) ◽  
pp. 5128-5132 ◽  
Author(s):  
K. Pathmanathan ◽  
J. R. Stevens
Keyword(s):  
Ionic Conductivity ◽  
Electric Modulus ◽  
Conductivity Relaxation

scholarly journals Dielectric and impedance analysis of Li0.5La0.5Ti1-xZrxO3(x = 0.05 and 0.1) ceramics as improved electrolyte material for lithium-ion batteries

2016 ◽  
Vol 34 (3) ◽  
pp. 605-616 ◽  
Author(s):  
K. Vijaya Babu ◽  
V. Veeraiah
Keyword(s):  
Ionic Conductivity ◽  
Lithium Ion Batteries ◽  
Electric Modulus ◽  
Lithium Ion ◽  
Impedance Analysis ◽  
Solid State Reaction Method ◽  
High Ionic Conductivity ◽  
Conductivity Relaxation ◽  
Reaction Method ◽  
X Ray

AbstractThe most attractive property of Li0.5La0.5TiO3 (LLTO) electrolytes is their high ionic conductivity. Studies have shown that LLTO is capable of existing in a state with an ionic conductivity of 10-3 S/cm, which is comparable to liquid electrolytes. In addition to the high ionic conductivity of the material, LLTO is electrochemically stable and able to withstand hundreds of cycles. So, the studies of the solid electrolyte material are very important for the development of lithium-ion batteries. In the present paper, Li0.5La0.5Ti1-xZrxO3 (x = 0.05 and 0.1) have been prepared by a solid-state reaction method at 1300 °C for 6 hours to improve electrolyte materials for lithium-ion batteries. The phase identified by X-ray diffractometry and crystal structure corresponds to pm3m (2 2 1) space group (Z = 1). The frequency and temperature dependence of impedance, dielectric permittivity, dielectric loss and electric modulus of the Li0.5La0.5Ti1-xZrxO3 (x = 0.05 and 0.1) have been investigated. The dielectric and impedance properties have been studied over a range of frequency (42 Hz to 5 MHz) and temperatures (30 °C to 100 °C). The frequency dependent plot of modulus shows that the conductivity relaxation is of non-Debye type.

Structural Characterization and Ionic Conductivity of Metastable Gd2(Ti0.65Zr0.35)2O7 Powders Prepared by Mechanical Milling

2006 ◽  
Vol 972 ◽  
Author(s):  
Antonio F. Fuentes ◽  
Karla J. Moreno ◽  
Jacobo Santamaria ◽  
Carlos Leon ◽  
Ulises Amador
Keyword(s):  
Ionic Conductivity ◽  
Mechanical Milling ◽  
Sintering Temperature ◽  
Ion Dynamics ◽  
Conductivity Relaxation ◽  
Electrical Conductivity Relaxation ◽  
Ion Interactions ◽  
Oxygen Ion ◽  
Fluorite Type ◽  
Powder Phase

AbstractWe analyze in this work the influence of ordering on the oxygen ion dynamics in the ionic conductor Gd2(Ti0.65Zr0.35)2O7, prepared by mechanical milling. As-prepared powder phase presents a metastable anion deficient fluorite-type of structure below 800°C becoming a disordered pyrochlore above this temperature. Such phase transformation implies a significant increase in the ionic conductivity of this material as a result of a systematic decrease in the activation energy for the dc conductivity, from 1.23 to 0.78 eV. Electrical conductivity relaxation is well described by the Kohlrausch-Williams-Watts (KWW) stretched exponential function with the fractional exponent n decreasing systematically with increasing sintering temperature (increasing ordering) as a result of decreasing ion-ion interactions in better ordered samples.

Ionic Hopping Transport in Chitosan-Based Polymer Electrolytes

2006 ◽  
Vol 517 ◽  
pp. 237-241 ◽  
Author(s):  
A.S.A. Khiar ◽  
S.R. Majid ◽  
N.H. Idris ◽  
M.F. Hassan ◽  
R. Puteh ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Charge Transport ◽  
Polymer Electrolytes ◽  
Electric Modulus ◽  
Dissipation Factor ◽  
Electrical Modulus ◽  
Hopping Transport ◽  
Hopping Mechanism ◽  
Linear Behavior ◽  
Tan Δ

Measurement of the ionic conductivity for the CA-NH4CF3SO3-DMC system was carried out at frequencies of 50 Hz to1 MHz and also at temperatures of 298 K to 313 K. The plot of log σ versus 1000/T shows a linear behavior suggesting that the samples obey the Arrhenius relationship. The electrical relaxation of the system was analyzed using the complex electric modulus M* of the sample with the highest ionic conductivity at various temperatures. The analysis of electrical modulus and dissipation factor (tan δ) shows that charge transport occurs through a hopping mechanism.

Ionic conductivity, electric modulus and mechanical relaxations in silver iodide–silver molybdate glasses

2014 ◽  
Vol 401 ◽  
pp. 254-257 ◽  
Author(s):  
Andrea Mandanici ◽  
Anna Raimondo ◽  
Mauro Federico ◽  
Maria Cutroni ◽  
Piercarlo Mustarelli ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Silver Iodide ◽  
Electric Modulus ◽  
Silver Molybdate

scholarly journals Immittance Studies of Bi6Fe2Ti3O18 Ceramics

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5286 ◽  
Author(s):  
Agata Lisińska-Czekaj ◽  
Dionizy Czekaj ◽  
Barbara Garbarz-Glos ◽  
Wojciech Bąk
Keyword(s):  
Activation Energy ◽  
Electric Modulus ◽  
Complex Impedance ◽  
Dc Conductivity ◽  
Modulus Function ◽  
Conductivity Relaxation ◽  
Frequency Range ◽  
A Value ◽  
Polycrystalline Ceramics ◽  
Electric Behavior

Results of studies focusing on the electric behavior of Bi6Fe2Ti3O18 (BFTO) ceramics are reported. BFTO ceramics were fabricated by solid state reaction methods. The simple oxides Bi2O3, TiO2, and Fe2O3 were used as starting materials. Immittance spectroscopy was chosen as a method to characterize electric and dielectric properties of polycrystalline ceramics. The experimental data were measured in the frequency range Δν = (10−1–107) Hz and the temperature range ΔT = (−120–200) °C. Analysis of immittance data was performed in terms of complex impedance, electric modulus function, and conductivity. The activation energy corresponding to a non-Debye type of relaxation was found to be EA = 0.573 eV, whereas the activation energy of conductivity relaxation frequency was found to be EA = 0.570 eV. An assumption of a hopping conductivity mechanism for BFTO ceramics was studied by ‘universal’ Jonscher’s law. A value of the exponents was found to be within the “Jonscher’s range” (0.54 ≤ n ≤ 0.72). The dc-conductivity was extracted from the measurements. Activation energy for dc-conductivity was calculated to be EDC = 0.78 eV, whereas the dc hopping activation energy was found to be EH = 0.63 eV. The obtained results were discussed in terms of the jump relaxation model.

Fundamentals of ionic conductivity relaxation gained from study of procaine hydrochloride and procainamide hydrochloride at ambient and elevated pressure

2012 ◽  
Vol 136 (16) ◽  
pp. 164507 ◽  
Author(s):  
Z. Wojnarowska ◽  
A. Swiety-Pospiech ◽  
K. Grzybowska ◽  
L. Hawelek ◽  
M. Paluch ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Elevated Pressure ◽  
Procaine Hydrochloride ◽  
Conductivity Relaxation

Electrical and Dielectric Behavior of Nano-bio Ceramic Filler Incorporated Polymer Electrolytes for Rechargeable Lithium Batteries

2013 ◽  
Vol 16 (2) ◽  
pp. 115-120 ◽  
Author(s):  
K. Karuppasamy ◽  
T. Linda ◽  
S. Thanikaikarasan ◽  
S. Balakumar ◽  
T. Mahalingam ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Matrix ◽  
Polymer Electrolytes ◽  
Electric Modulus ◽  
Electrical Response ◽  
Electrochemical Characterizations ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Ceramic Filler ◽  
Hydroxy Apatite

A series of nanocomposite solid polymer electrolytes (NCSPE) consisting of PMMA as host polymer, lithium bisoxalatoborate (LiBOB) as doping salt and nano-hydroxy apatite as filler have prepared by membrane hot-press method. To enhance the electrochemical properties and stiffness of polymer electrolyte film, a bioactive ceramic filler nano-hydroxy apatite is incorporated in the polymer matrix. The prepared different weight contents of NCSPE films are subjected to various electrochemical characterizations such as ionic conductivity, electric modulus and dielectric spectroscopy studies. The complexation behavior and structural reorganization in polymer electrolytes are confirmed by means of FT-IR (Fourier-Transform Infra Red Spectroscopy) analysis. The electrical response and relaxation of dipole in polymer electrolytes are investigated by means of electric modulus and dielectric studies. The addition of nano-hydroxy apatite significantly enhances the ionic conductivity and blocking the reorganizing tendency of polymer matrix. The maximum ionic conductivity is found to be in the range of 10-4.8 S/cm for sample containing 10 wt. % nanoceramic filler.

scholarly journals Dataset for correlation in γ-RbAg4I5 between ionic conductivity relaxation and specific heat

Data in Brief ◽  
2019 ◽  
Vol 26 ◽  
pp. 104404
Author(s):  
H. Correa ◽  
Alvaro Garcia Muriel ◽  
D. Peña Lara
Keyword(s):  
Ionic Conductivity ◽  
Specific Heat ◽  
Conductivity Relaxation
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