Dielectric Studies of Proton Conducting Polymer Electrolyte Based on Chitosan/PEO Blend Doped with NH4NO3

2012 ◽  
Vol 488-489 ◽  
pp. 583-587 ◽  
Author(s):  
M.F. Shukur ◽  
M.F.Z. Kadir ◽  
Z. Ahmad ◽  
R. Ithnin
Keyword(s):  
Electrical Impedance ◽  
Electric Modulus ◽  
Ionic Conduction ◽  
Charge Carriers ◽  
Electrical Impedance Spectroscopy ◽  
Low Frequencies ◽  
Solution Cast ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Solution Cast Method

Polymer blend of chitosan and poly(ethylene oxide) (PEO) electrolytes were prepared by employing solution cast method. Ammonium nitrate (NH4NO3) was added to the blend to supply the charge carriers for ionic conduction. The impedance of the electrolytes was measured by electrical impedance spectroscopy (EIS) over the frequency range of 50 Hz to 1 MHz. The permittivity ɛr and electric modulus Mr of the complex were analyzed. Dispersion at low frequencies caused by space charge effect from the electrodes was observed. The modulus plots indicated that the dispersion deviated from the Debye behaviour. The relaxation time, τ decreased to 1.64 × 10-7 s as the NH4NO3 content was increased up to 40 wt.%.

Transport Properties of Chitosan/Peo Blend Based Proton Conducting Polymer Electrolyte

2012 ◽  
Vol 488-489 ◽  
pp. 114-117 ◽  
Author(s):  
M.F. Shukur ◽  
M.F.Z. Kadir ◽  
Z. Ahmad ◽  
R. Ithnin
Keyword(s):  
Activation Energy ◽  
Ionic Conduction ◽  
Charge Carriers ◽  
Number Density ◽  
Model Sample ◽  
Mobility Of Charge Carriers ◽  
Solution Cast ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Cast Technique

The polymer electrolytes were prepared using the solution cast technique. The polymer host consisted of chitosan and poly(ethylene oxide) (PEO). Ammonium nitrate (NH4NO3) was added to the blend solution to provide the charge carriers for ionic conduction. The sample containing 40 wt.% NH4NO3 exhibited a conductivity value of 5.83 × 10-4 S cm-1 at 373 K. Conductivity-temperature relationship for all samples obeyed Arrhenius rule and the activation energy of each samples were obtained. The sample containing 40 wt.% NH4NO3 showed the lowest activation energy at 0.29 eV. The conductivity variation for the prepared electrolyte system was explained using the Rice and Roth model. Sample with 40 wt. % NH4NO3 exhibited the highest number density and mobility of charge carriers with values of 1.39 × 1020 cm-3 and 4.60 × 10-6 cm2 V-1 s-1 respectively. The increase in conductivity was attributed to the increase in the number density and mobility of charge carriers.

Microwave Assisted Blending-Intercalation of Ion-Conductor Polymers into Layered Silicates

1998 ◽  
Vol 519 ◽  
Author(s):  
P. Aranda ◽  
J.C. Galván ◽  
E. Ruiz-Hitzky
Keyword(s):  
Electrical Impedance ◽  
Polymer Melt ◽  
Electrical Impedance Spectroscopy ◽  
Layered Silicates ◽  
Alternative Procedure ◽  
Ion Conductor ◽  
Microwave Assisted ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

AbstractOrgano-inorganic hybrid nancomposites derived from poly(ethylene oxide) and montmorillonite silicate are prepared by an alternative procedure to classical polymer intercalation either from solutions or by polymer melt-intercalation. XRD, FTIR, DSC, elemental microanalysis and SEM techniques are applied for structural characterization of the resulting materials. The electrical properties of these nanocomposites are studied by means of the electrical impedance spectroscopy (EIS) showing enhanced ionic conductivity compared to similar samples prepared by intercalation from solution.

Effect of Temperature on Conductivity Studies of Cellulose Acetate Based Polymer Electrolytes

2013 ◽  
Vol 667 ◽  
pp. 240-245
Author(s):  
Ruslinda Md Ali ◽  
Nurhana Ilmira Harun ◽  
Abd Malik Marwan Ali ◽  
Mohamad Faizul Yahya
Keyword(s):  
Cellulose Acetate ◽  
Polymer Electrolytes ◽  
Electrical Impedance ◽  
Ionic Conduction ◽  
Electrical Impedance Spectroscopy ◽  
Effect Of Temperature ◽  
Scanning Calorimetry ◽  
Solution Cast ◽  
The Relationship ◽  
Cast Technique

This paper presents cellulose acetate (CA) - ammonium tetrafluoroborate (NH4BF4) salt complexes films via solution cast technique. The relationship between ionic conduction and the glass transition temperature was investigated in selected cellulose-salt complexes via electrical impedance spectroscopy (EIS) and differential scanning calorimetry (DSC). The thermal study of the films has also investigated using thermogravimetric analysis (TGA).

Effects of Ammonium Tetrafluoroborate on Conductivity and Thermal Studies on Cellulose Acetate Based Polymer Electrolytes

2013 ◽  
Vol 667 ◽  
pp. 150-154 ◽  
Author(s):  
Nurhana Ilmira Harun ◽  
Ruslinda Md Ali ◽  
Ab Malik Marwan Ali ◽  
Mohamad Faizul Yahya
Keyword(s):  
Cellulose Acetate ◽  
Polymer Electrolytes ◽  
Electrical Impedance ◽  
Ionic Conduction ◽  
Thermal Studies ◽  
Electrical Impedance Spectroscopy ◽  
Scanning Calorimetry ◽  
Solution Cast ◽  
The Relationship ◽  
Cast Technique

his paper presents cellulose acetate (CA) - ammonium tetrafluoroborate (NH4BF4) salt complexes films via solution cast technique. The relationship between ionic conduction and the glass transition temperature was investigated in selected cellulose-salt complexes via electrical impedance spectroscopy (EIS) and differential scanning calorimetry (DSC). The thermal study of the films has also investigated using thermogravimetric analysis (TGA).

scholarly journals Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3System under CO2Gas Flows

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Bahcine Bakiz ◽  
Frédéric Guinneton ◽  
Madjid Arab ◽  
Abdeljalil Benlhachemi ◽  
Sylvie Villain ◽  
...  
Keyword(s):  
Gas Flow ◽  
Electrical Impedance ◽  
Ionic Conduction ◽  
Ionic Mobility ◽  
Phase Changes ◽  
Electrical Impedance Spectroscopy ◽  
Electrical Measurements ◽  
Carbonate Ions ◽  
Ionic Mobilities ◽  
Kinetics Of

The carbonatation of La2O3oxide and the decarbonatation of lanthanum carbonate phase La2O2CO3are investigated using thermal and thermogravimetry analyses under CO2gas flow. The initial phase La2O3is first elaborated from pyrolysis of a LaOHCO3precursor. Then, thermal and thermogravimetry analyses are carried out under CO2flow, as temperature increases then decreases. The carbonatation kinetics of La2O3is determined at three fixed temperatures. Electrical impedance spectroscopy is performed to determine the electrical responses associated with ionic mobilities and phase changes, in the temperature range 25 to900∘C. The electrical conduction during heating underCO2gas flow should be linked to two regimes of ionic conduction of the carbonate ions. From these electrical measurements, the ionic mobility of carbonate ionsCO3  2−is found to be close to 0.003 ⋅10−4 cm2 s−1 V−1at750∘C for the monoclinic La2O2CO3phase.

Polymer Aukali-Metal Polyiodides with Variable Ionic and Electronic Conductivities

1988 ◽  
Vol 135 ◽  
Author(s):  
Hans-Conrad Zur Loye ◽  
Leslie J. Lyons ◽  
L. Charles Hardy ◽  
James S. Tonge ◽  
Duward F. Shriver
Keyword(s):  
Ion Mobility ◽  
Ionic Conduction ◽  
Ionic Conductivities ◽  
Iodine Content ◽  
Electronic Conductivities ◽  
Activated Processes ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Poly Propylene ◽  
Cation Ratio

AbstractAlkali metal polyiodide complexes of polyethers, of the type (polymer)nMIx, [Polymer - poly(ethylene oxide), PEO; poly(propylene oxide), PPO; or poly-(bis(methoxyethoxyethoxy)phosphazene), MEEP, and M - Li or Na] have been prepared and characterized in order to elucidate the nature of the observed ionic and electronic conductivities. Raman spectra of the polyiodide complexes indicate that the relative concentrations of the polyiodide species (such as I3- and higher polyiodides) depend on the salt concentration in the polymer as well as on the iodine to cation ratio. The ionic conduction can best be described by a free volume (VTF) mechanism where both polymer motion and ion mobility are activated processes. The magnitude of the electronic and ionic conductivities are a function of polymer to salt ratio as well as iodine content.

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