Anji Reddy Polu, Faisal Islam Chowdhury, Pramod K. Singh, Markus Diantoro, Firdaus Mohamad Hamzah
In this study, nanocomposite solid polymer electrolytes (NSPEs) based on poly(ethylene glycol) (PEG), potassium nitrate (KNO3), and titanium oxide (TiO2) nanoparticles were synthesized using a solution casting technique. The impact of various TiO2 nanoparticle concentrations on the structural, thermal, electrical and electrochemical properties of the NSPEs was investigated. X-ray diffraction analysis revealed a decrease in the degree of crystallinity of the PEG–KNO3 electrolyte upon the addition of TiO2 nanoparticles. Differential scanning calorimetry measurements showed a decrease in the melting temperature of the NSPE with the incorporation of 6 wt.% TiO2 nanoparticle concentration. The ionic conductivity of the NSPEs increased with TiO2 concentration up to 6 wt.% (σ = 5.94 × 10−5 S/cm), beyond which a decrease was observed. Transference number measurements confirmed the dominance of ionic charge transport in the NSPE. A solid-state electrochemical cell fabricated using the optimal NSPE composition (80PEG–20KNO3–6 wt.% TiO2) exhibited promising discharge performance under a constant load of 100 kΩ. © 2024
Materials for Energy Devices Lab, Department of Physics, BVRIT HYDERABAD College of Engineering for Women, Telangana, Hyderabad, 500090, India; Nanotechnology, Renewable Energy & Catalysis Research Laboratory (NRCRL), Department of Chemistry, University of Chittagong, Chattogram-4331, Bangladesh; Center for Solar Cells and Renewable Energy, Sharda School of Basic Sciences and Research, Sharda University, Uttar Pradesh, Greater Noida, 201306, India; Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Malang, 65145, Indonesia; Centre for Defence Foundation Studies, Universiti Pertahanan Nasional Malaysia, Kem Sungai Besi, Kuala Lumpur, 57000, Malaysia
