Improving EDLC Device Performance Constructed from Plasticized Magnesium Ion Conducting Chitosan Based Polymer Electrolytes via Metal Complex Dispersion

Shujahadeen B Aziz; Elham M A Dannoun; M H Hamsan; Rebar T Abdulwahid; Kuldeep Mishra; Muaffaq M Nofal; M F Z Kadir

doi:10.3390/membranes11040289

Improving EDLC Device Performance Constructed from Plasticized Magnesium Ion Conducting Chitosan Based Polymer Electrolytes via Metal Complex Dispersion

Membranes (Basel). 2021 Apr 14;11(4):289. doi: 10.3390/membranes11040289.

Authors

Shujahadeen B Aziz^{1

2}, Elham M A Dannoun³, M H Hamsan⁴, Rebar T Abdulwahid^{1

5}, Kuldeep Mishra⁶, Muaffaq M Nofal⁷, M F Z Kadir⁴

Affiliations

¹ Hameed Majid Advanced Polymeric Materials Research Lab., Physics, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq.
² Department of Civil Engineering, College of Engineering, Komar University of Science and Technology, Sulaimani 46001, Kurdistan Regional Government, Iraq.
³ Associate Director of General Science Department, Woman Campus, Prince Sultan University, P.O. Box 66833, Riyadh 11586, Saudi Arabia.
⁴ Centre for Foundation Studies in Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
⁵ Department of Physics, College of Education, University of Sulaimani, Old Campus, Sulaimani 46001, Iraq.
⁶ Department of Physics and Materials Science, Jaypee University, Anoopshahr 203390, India.
⁷ Department of Mathematics and General Sciences, Prince Sultan University, P.O. Box 66833, Riyadh 11586, Saudi Arabia.

Abstract

The current work shows the preparation of plasticized chitosan-magnesium acetate Mg(CH₃COO)₂-based polymer electrolyte dispersed with nickel (Ni) metal complexes via solution casting. Investigations of electrical and electrochemical properties of the prepared polymer composite electrolyte were carried out. The structural and optical properties of the samples were studied using X-ray diffraction (XRD) and UV-Vis spectroscopy techniques. The structural and optical outcomes revealed a clear enhancement in both absorbance and amorphous nature of the samples upon the addition of Ni metal complexes. Through the simulation of impedance data, various ion transport parameters were calculated. The electrochemical performance of the sample was examined by means of transference number measurement (TNM), linear sweep voltammetry (LSV) and cyclic voltammetry (CV) measurements. The TNM analysis confirmed the dominance of ions as the main charge carrier in the electrolyte with t_ion of (0.96) compared to only (0.04) for t_el. The present electrolyte was stable in the range of 0 V to 2.4 V, which was obtained from linear sweep voltammetry (LSV). A result from CV proved that the electrical double-layer capacitor (EDLC) has a capacitive behavior as no redox peaks could be observed. The presence of Ni improved the charge-discharge cycle of the EDLC due to its amorphous behavior. The average performances of the EDLC were recorded as 41.7 F/g, 95%, 5.86 Wh/kg and 628 W/kg for specific capacitance, coulombic efficiency, energy and power densities, respectively. The fabricated EDLC device was found to be stable up to 1000 cycles.

Keywords: CV; EDLC device; TNM and LSV analysis; impedance study; metal complex; plasticized polymer electrolyte; structural analysis.