The Study of Structural, Impedance and Energy Storage Behavior of Plasticized PVA:MC Based Proton Conducting Polymer Blend Electrolytes

Shujahadeen B Aziz; Iver Brevik; M A Brza; A S F M Asnawi; Elham M A Dannoun; Y M Yusof; Rebar T Abdulwahid; M H Hamsan; Muaffaq M Nofal; M F Z Kadir

doi:10.3390/ma13215030

The Study of Structural, Impedance and Energy Storage Behavior of Plasticized PVA:MC Based Proton Conducting Polymer Blend Electrolytes

Materials (Basel). 2020 Nov 7;13(21):5030. doi: 10.3390/ma13215030.

Authors

Shujahadeen B Aziz^{1

2}, Iver Brevik³, M A Brza^{1

4}, A S F M Asnawi⁵, Elham M A Dannoun⁶, Y M Yusof⁵, Rebar T Abdulwahid^{1

7}, M H Hamsan⁸, Muaffaq M Nofal⁹, M F Z Kadir¹⁰

Affiliations

¹ Hameed majid Advanced Polymeric Materials Research Lab., Physics, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government-Iraq, Sulaimani 46001, Iraq.
² Department of Civil engineering, College of Engineering, Komar University of Science and Technology, Kurdistan Regional Government, Sulaimani 46001, Iraq.
³ Department of Energy and Process Engineering, Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
⁴ Department of Manufacturing and Materials Engineering, Faculty of Engineering, International Islamic University of Malaysia, Kuala Lumpur 53100, Malaysia.
⁵ Chemical Engineering Section, Universiti Kuala Lumpur, Malaysian Institute of Chemical & Bioengineering Technology (UniKL MICET), Alor Gajah 78000, Malacca, Malaysia.
⁶ Associate Director of General Science Department, Woman Campus, Prince Sultan University, P. O. Box 66833, Riyadh 11586, Saudi Arabia.
⁷ Department of Physics, College of Education, University of Sulaimani, Old Campus, Kurdistan Regional Government, Sulaimani 46001, Iraq.
⁸ Institute for Advanced Studies, University of Malaya, Kuala Lumpur 50603, Malaysia.
⁹ Department of Mathematics and General Sciences, Prince Sultan University, P. O. Box 66833, Riyadh 11586, Saudi Arabia.
¹⁰ Centre for Foundation Studies in Science, University of Malaya, Kuala Lumpur 50603, Malaysia.

Abstract

In this study, structural characterization, electrical properties and energy storage performance of plasticized polymer electrolytes based on polyvinyl alcohol/methylcellulose/ammonium thiocyanate (PVA/MC-NH₄SCN) were carried out. An X-ray diffraction (XRD) study displayed that the plasticized electrolyte system with the uppermost value of direct current (DC) ionic conductivity was the most amorphous system. The electrolyte in the present work realized an ionic conductivity of 2.903 × 10^-3 Scm^-1 at room temperature. The main charge carrier in the electrolyte was found to be the ions with the ionic transference number (t_ion) of 0.912, compared to only 0.088 for the electronic transference number (t_elec). The electrochemical stability potential window of the electrolyte is 2.1 V. The specific capacitance was found to reduce from 102.88 F/g to 28.58 F/g as the scan rate increased in cyclic voltammetry (CV) analysis. The fabricated electrochemical double layer capacitor (EDLC) was stable up to 200 cycles with high efficiency. The specific capacitance obtained for the EDLC by using charge-discharge analysis was 132.7 F/g at the first cycle, which is slightly higher compared to the CV plot. The equivalent series resistance (ESR) increased from 58 to 171 Ω throughout the cycles, which indicates a good electrolyte/electrode contact. Ions in the electrolyte were considered to have almost the same amount of energy during the conduction process as the energy density is approximately at 14.0 Wh/kg throughout the 200 cycles. The power density is stabilized at the range of 1444.3 to 467.6 W/kg as the EDLC completed the cycles.

Keywords: CV; TNM and LSV; XRD and impedance study; energy storage EDLC device; polymer blends.