Energy Storage Behavior of Lithium-Ion Conducting poly(vinyl alcohol) (PVA): Chitosan(CS)-Based Polymer Blend Electrolyte Membranes: Preparation, Equivalent Circuit Modeling, Ion Transport Parameters, and Dielectric Properties

Mohamad Brza; Shujahadeen B Aziz; Salah Raza Saeed; Muhamad H Hamsan; Siti Rohana Majid; Rebar T Abdulwahid; Mohd F Z Kadir; Ranjdar M Abdullah

doi:10.3390/membranes10120381

Energy Storage Behavior of Lithium-Ion Conducting poly(vinyl alcohol) (PVA): Chitosan(CS)-Based Polymer Blend Electrolyte Membranes: Preparation, Equivalent Circuit Modeling, Ion Transport Parameters, and Dielectric Properties

Membranes (Basel). 2020 Nov 30;10(12):381. doi: 10.3390/membranes10120381.

Authors

Mohamad Brza¹, Shujahadeen B Aziz^{2

3}, Salah Raza Saeed⁴, Muhamad H Hamsan⁵, Siti Rohana Majid⁶, Rebar T Abdulwahid^{2

7}, Mohd F Z Kadir⁵, Ranjdar M Abdullah²

Affiliations

¹ Manufacturing and Materials Engineering Department, Faculty of Engineering, International Islamic University of Malaysia, Kuala Lumpur 50603, Malaysia.
² Hameed Majid Advanced Polymeric Materials Research Laboratory, Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Iraq.
³ Department of Civil Engineering, College of Engineering, Komar University of Science and Technology, Sulaimani 46001, Iraq.
⁴ Charmo Research Center, Charmo University, Peshawa Street, Chamchamal 46023, Iraq.
⁵ Centre for Foundation Studies in Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
⁶ Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
⁷ Department of Physics, College of Education, Old Campus, University of Sulaimani, Kurdistan Regional Government, Sulaimani 46001, Iraq.

Abstract

Plasticized lithium-ion-based-conducting polymer blend electrolytes based on poly(vinyl alcohol) (PVA):chitosan (CS) polymer was prepared using a solution cast technique. The conductivity of the polymer electrolyte system was found to be 8.457 × 10^-4 S/cm, a critical factor for electrochemical device applications. It is indicated that the number density (n), diffusion coefficient (D), and mobility (μ) of ions are increased with the concentration of glycerol. High values of dielectric constant and dielectric loss were observed at low frequency region. A correlation was found between the dielectric constant and DC conductivity. The achieved transference number of ions (t_ion) and electrons (t_e) for the highest conducting plasticized sample were determined to be 0.989 and 0.011, respectively. The electrochemical stability for the highest conducting sample was 1.94 V, indicated by linear sweep voltammetry (LSV). The cyclic voltammetry (CV) response displayed no redox reaction peaks through its entire potential range. Through the constructing electric double-layer capacitor, the energy storage capacity of the highest conducting sample was investigated. All decisive parameters of the EDLC were determined. At the first cycle, the specific capacitance, internal resistance, energy density, and power density were found to be 130 F/g, 80 Ω, 14.5 Wh/kg, and 1100 W/kg, respectively.

Keywords: PVA:CS polymer blends; dielectric properties; electrical equivalent circuit; energy storage study; impedance study; ion transport properties.