Plasticised chitosan: Dextran polymer blend electrolyte for energy harvesting application: Tuning the ion transport and EDLC charge storage capacity through TiO 2 dispersion.

Autor: Aziz SB; Reserach and Development Center, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq. Electronic address: shujahadeenaziz@gmail.com., Murad AR; Department of Chemistry, College of Science, Charmo University, Chamchamal, Sulaymaniyah 46023, Iraq., Abdulwahid RT; Department of Physics, College of Education, University of Sulaimani, Sulaymaniyah 46001, Kurdistan Region, Iraq., Aziz DM; Department of Chemistry, College of Science, University of Raparin, Kurdistan Region 46012, Ranya, Iraq., Abdalrahman AA; Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46001, Iraq., Abdullah RM; Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46001, Iraq., Kadir MFZ; Centre for Ionic Universiti Malaya (CIUM), Department of Physics, Faculty of Science, Universiti Malaya, Malaysia; Department of Physics, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia., Abdullah OG; Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46001, Iraq., Halim NA; Department of Physics, Centre for Defence Foundation Studies, National Defence University of Malaysia, Sungai Besi Camp, Kuala Lumpur 57000, Malaysia., Hassan J; Department of Physics, Khalifa University, Abu Dhabi, United Arab Emirates. Electronic address: jamal.hassan@ku.ac.ae.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2024 Jul; Vol. 273 (Pt 2), pp. 133203. Date of Electronic Publication: 2024 Jun 15.
DOI: 10.1016/j.ijbiomac.2024.133203
Abstrakt: This study investigates the performance of biopolymer electrolytes based on chitosan and dextran for energy storage applications. The optimization of ion transport and performance of electric double-layer capacitors EDCL using these electrolytes, incorporating different concentrations of glycerol as a plasticizer and TiO 2 as nanoparticles, is explored. Impedance measurements indicate a notable reduction in charge transfer resistance with the addition of TiO 2 . DC conductivity estimates from AC spectra plateau regions reach up to 5.6 × 10 -4  S/cm. The electric bulk resistance R b obtained from the Nyquist plots exhibits a substantial decrease with increasing plasticizer concentration, further enhanced by the addition of the nanoparticles. Specifically, R b decreases from ∼20 kΩ to 287 Ω when glycerol concentration increases from 10 % to 40 % and further drops to 30 Ω with the introduction of TiO 2 . Specific capacitance obtained from cyclic voltammetry shows a notable increase as the scan rate decreases, indicating improved efficiency and stability of ion transport. The TiO 2 -enriched EDCL achieves 12.3 F/g specific capacitance at 20 mV/s scan rate, with high ion conductivity and extended electrochemical stability. These results suggest the great potential of plasticizer and TiO 2 with biopolymers in improving the performance of energy storage systems.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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