scholarly journals A Polymer Blend Electrolyte Based on CS with Enhanced Ion Transport and Electrochemical Properties for Electrical Double Layer Capacitor Applications

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 930
Author(s):  
Shujahadeen B. Aziz ◽  
Elham M. A. Dannoun ◽  
Muhamad H. Hamsan ◽  
Hewa O. O. Ghareeb ◽  
Muaffaq M. Nofal ◽  
...  
Keyword(s):  
Ion Transport ◽  
Transport Properties ◽  
Polymer Electrolyte ◽  
Internal Resistance ◽  
Transport Parameter ◽  
Transport Parameters ◽  
Double Layer Capacitor ◽  
Solution Cast ◽  
Polymer Blend Electrolyte ◽  
Good Agreement

The fabrication of energy storage EDLC in this work is achieved with the implementation of a conducting chitosan–methylcellulose–NH4NO3–glycerol polymer electrolyte system. The simple solution cast method has been used to prepare the electrolyte. The impedance of the samples was fitted with equivalent circuits to design the circuit diagram. The parameters associated with ion transport are well studied at various plasticizer concentrations. The FTIR investigation has been done on the films to detect the interaction that occurs among plasticizer and polymer electrolyte. To get more insights into ion transport parameters, the FTIR was deconvoluted. The transport properties achieved from both impedance and FTIR are discussed in detail. It was discovered that the transport parameter findings are in good agreement with both impedance and FTIR studies. A sample with high transport properties was characterized for ion dominancy and stability through the TNM and LSV investigations. The dominancy of ions in the electrolyte verified as the tion of the electrolyte is established to be 0.933 whereas it is potentially stable up to 1.87 V. The rechargeability of the EDLC is steady up to 500 cycles. The internal resistance, energy density, and power density of the EDLC at the 1st cycle are 53 ohms, 6.97 Wh/kg, and 1941 W/kg, respectively.

scholarly journals Effect of PVA Blending on Structural and Ion Transport Properties of CS:AgNt-Based Polymer Electrolyte Membrane

Polymers ◽  
2017 ◽  
Vol 9 (11) ◽  
pp. 622 ◽  
Author(s):  
Shujahadeen Aziz ◽  
Omed Abdullah ◽  
Sarkawt Hussein ◽  
Hameed Ahmed
Keyword(s):  
Ion Transport ◽  
Transport Properties ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Electrolyte Membrane

scholarly journals Solid-State EDLC Device Based on Magnesium Ion-Conducting Biopolymer Composite Membrane Electrolytes: Impedance, Circuit Modeling, Dielectric Properties and Electrochemical Characteristics

Membranes ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 389
Author(s):  
Ahmad S. F. M. Asnawi ◽  
Shujahadeen B. Aziz ◽  
Salah R. Saeed ◽  
Yuhanees M. Yusof ◽  
Rebar T. Abdulwahid ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Room Temperature ◽  
Internal Resistance ◽  
Circuit Modeling ◽  
Electrochemical Characteristics ◽  
Transport Parameters ◽  
Double Layer Capacitor ◽  
Electrochemical Double Layer ◽  
Ion Conducting ◽  
Discharge Profile

The polymer electrolyte based on Dx:Cs:Mg(CH3COO)2:Ni with three different glycerol concentrations have been prepared. The impedance study has verified that the electrolyte with 42 wt.% of glycerol (A3) has the highest ionic conductivity of 7.71 × 10−6 S cm−1 at room temperature. The ionic conductivity is found to be influenced by the transport parameters. From the dielectric analysis, it was shown that the electrolytes in this system obeyed the non-Debye behavior. The A3 electrolyte exhibited a dominancy of ions (tion > te) with a breakdown voltage of 2.08 V. The fabricated electrochemical double layer capacitor (EDLC) achieved the specific capacitance values of 24.46 F/g and 39.68 F/g via the cyclic voltammetry (CV) curve and the charge–discharge profile, respectively. The other significant parameters to evaluate the performance of EDLC have been determined, such as internal resistance (186.80 to 202.27 Ω) energy density (4.46 Wh/kg), power density (500.58 to 558.57 W/kg) and efficiency (92.88%).

scholarly journals Ion Transport Study in CS: POZ Based Polymer Membrane Electrolytes Using Trukhan Model

2019 ◽  
Vol 20 (21) ◽  
pp. 5265 ◽  
Author(s):  
Aziz ◽  
Karim ◽  
Brza ◽  
Abdulwahid ◽  
Saeed ◽  
...  
Keyword(s):  
Ion Transport ◽  
Polymer Blend ◽  
Imaginary Part ◽  
Electric Modulus ◽  
Transport Parameters ◽  
Impedance Plot ◽  
Relaxation Dynamic ◽  
Different Temperatures ◽  
Solution Cast ◽  
Xrd Patterns

In this work, analysis of ion transport parameters of polymer blend electrolytes incorporated with magnesium trifluoromethanesulfonate (Mg(CF3SO3)2) was carried out by employing the Trukhan model. A solution cast technique was used to obtain the polymer blend electrolytes composed of chitosan (CS) and poly (2-ethyl-2-oxazoline) (POZ). From X-ray diffraction (XRD) patterns, improvement in amorphous phase for the blend samples has been observed in comparison to the pure state of CS. From impedance plot, bulk resistance (Rb) was found to decrease with increasing temperature. Based on direct current (DC) conductivity (σdc) patterns, considerations on the ion transport models of Arrhenius and Vogel–Tammann–Fulcher (VTF) were given. Analysis of the dielectric properties was carried out at different temperatures and the obtained results were linked to the ion transport mechanism. It is demonstrated in the real part of electrical modulus that chitosan-salt systems are extremely capacitive. The asymmetric peak of the imaginary part (Mi) of electric modulus indicated that there is non-Debye type of relaxation for ions. From frequency dependence of dielectric loss (ε″) and the imaginary part (Mi) of electric modulus, suitable coupling among polymer segmental and ionic motions was identified. Two techniques were used to analyze the viscoelastic relaxation dynamic of ions. The Trukhan model was used to determine the diffusion coefficient (D) by using the frequency related to peak frequencies and loss tangent maximum heights (tanδmax). The Einstein–Nernst equation was applied to determine the carrier number density (n) and mobility. The ion transport parameters, such as D, n and mobility (μ), at room temperature, were found to be 4 × 10−5 cm2/s, 3.4 × 1015 cm−3, and 1.2 × 10−4 cm2/Vs, respectively. Finally, it was shown that an increase in temperature can also cause these parameters to increase.

scholarly journals Employing of Trukhan Model to Estimate Ion Transport Parameters in PVA Based Solid Polymer Electrolyte

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1694 ◽  
Author(s):  
Aziz ◽  
B. Marif ◽  
Brza ◽  
Hamsan ◽  
Kadir
Keyword(s):  
Ion Transport ◽  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Poly Vinyl Alcohol ◽  
Relaxation Dynamics ◽  
Transport Parameters ◽  
Arrhenius Behavior ◽  
Increasing Temperature

In the current paper, ion transport parameters in poly (vinyl alcohol) (PVA) based solid polymer electrolyte were examined using Trukhan model successfully. The desired amount of lithium trifluoromethanesulfonate (LiCF3SO3) was dissolved in PVA host polymer to synthesis of solid polymer electrolytes (SPEs). Ion transport parameters such as mobility (μ), diffusion coefficient (D), and charge carrier number density (n) are investigated in detail using impedance spectroscopy. The data results from impedance plots illustrated a decrement of bulk resistance with an increase in temperature. Using electrical equivalent circuits (EEC), electrical impedance plots (ZivsZr) are fitted at various temperatures. The results of impedance study demonstrated that the resistivity of the sample decreases with increasing temperature. The decrease of resistance or impedance with increasing temperature distinguished from Bode plots. The dielectric constant and dielectric loss values increased with an increase in temperature. The loss tangent peaks shifted to higher frequency region and the intensity increased with an increase in temperature. In this contribution, ion transport as a complicated subject in polymer physics is studied. The conductivity versus reciprocal of temperature was found to obey Arrhenius behavior type. The ion transport mechanism is discussed from the tanδ spectra. The ion transport parameters at ambient temperature are found to be 9 × 10−8 cm2/s, 0.8 × 1017 cm−3, and 3 × 10−6 cm2/Vs for D, n, andμ respectively. All these parameters have shown increasing as temperature increased. The electric modulus parameters are studied in an attempt to understand the relaxation dynamics and to clarify the relaxation process and ion dynamics relationship.

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