Ion transport and electrochemical properties of proton conducting SPE for EDLC with constant specific capacitance and energy density
Document Type
Article
Publication Date
4-1-2023
Abstract
Chitosan (CH): poly(2-oxazoline) (POZ): ammonium thiocyanate (NH4SCN): glycerol electrolytes with developed conductivity are organized using solution casting technique. The loading of 50 wt. % glycerol maximized the conductivity to 1.58 x 10-3 S/cm. The simulations of electrochemical impedance spec-troscopy (EIS) data with the electrical equivalent circuit (EEC) method are used to determine fundamen-tal ion transport parameters. The diffusion coefficient (D) of 4.67 x 10-7 cm2 s-1, mobility (l) of 1.82 x 10- 5 cm2 V-1 s, and carrier density (n) of 5.42 x 1020 cm -3 are measured successfully for the highest ion con-ducting system. Dielectric properties such as dielectric constant, dielectric loss and electric modulus are studied as a function of frequency. Conductivity and dielectric analysis are found to follow the same trend. There are observable peaks in both e''and tand spectra. Various electrochemical tests are measured for the highest ion conducting sample. Transference numbers of ion (tion) and electron (te) for the CSPZNHSN5 are measured to be 0.8 and 0.2, respectively, which show that ions are the majority charge carriers. The electrochemical stability of the CSPZNHSN5 which is measured by linear sweep voltamme-try (LSV) was found to be 2.2 V. The electric double layer capacitor (EDLC) internal resistance is between 68 X and 82 X. Using the GCD measurement, the capacitance, energy, and power density of the EDLC are 100F/g, 14.5 Wh/kg, and 1500 W/kg.(c) 2023 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
Keywords
Plasticized polymer electrolyte, EIS and ions transport parameters, LSV and TNM analyses, EDLC device
Divisions
PHYSICS
Funders
Ministry of Higher Education and Scientific Research -Kurdish National Research Council (KNRC),Kurdistan Regional Government/Iraq; University of Sulaimani,Cihan University Sulaimaniya; University of Malaya
Publication Title
Journal of Industrial and Engineering Chemistry
Volume
120
Publisher
Elsevier
Publisher Location
STE 800, 230 PARK AVE, NEW YORK, NY 10169 USA