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ABSTRACT
Solid polymer electrolytes (SPEs) have been widely studied due to its extensive applications in high energy rechargeable batteries, supercapacitors, fuel cells, photoelectrochemical and electrochromic displays. Herein, SPEs based on polyvinyl pyrrolidone (PVP) doped with cesium aluminate (CsAlO2) nanoparticles (NPs), lithium perchlorate (LiClO4) as an electrolyte and varying amounts viz., 2, 4, 6 and 8 wt.% of ethylene carbonate (EC) as plasticizer have been fabricated by solution intercalation technique. The structural features of PVP-CsAlO2-LiClO4-EC SPEs have been studied by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The morphology of PVP-CsAlO2-LiClO4-EC SPEs has been examined by scanning electron microscopy (SEM). The thermal properties of the SPEs were characterized by the thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC) techniques. The TGA and DSC results revealed that a significant reduction in thermal stability and glass transition temperature (Tg) of PVP with an increase in EC content in SPE films. The optoelectrical properties of PVP-CsAlO2-LiClO4-EC SPE films have been evaluated using UV–visible spectroscopy. The band gap energy (Eg) was found to decrease with an increase in EC content, exhibiting a minimum of 4.23 eV for PVP-8 wt.% CsAlO2-15 wt.% LiClO4-8 wt.% EC. This could be ascribed to the formation of localized states and increased degree of disorder in the PVP-CsAlO2-LiClO4 SPE films. The integrated plasticizers increase the values of refractive index (RI), optical conductivity, and dielectric constants of PVP-CsAlO2-LiClO4 SPE films. The AC conductivity of the SPEs has been evaluated at room temperature using digital LCR meter in the frequency range 100 Hz – 5 MHz. The conductivity strongly depends on CsAlO2 NPs and EC plasticizer content in SPEs.
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Notes on contributors
Adel Morshed Nagi Saeed
Adel M. N. Saeed obtained Ph.D., (2020) degree from Department of Polymer Science and Technology, SJC Engineering collage, JSS campus, under Mysore University, Mysuru, India. He is Advisor of technical in Aviation fueling management of Yemen Petroleum Company. He has more than 21 years of Chemical engineer in the laboratory of Aviation fueling management of Yemen Petroleum Company. He is responsible of specific control the aviation fuel where the whole tests and specific experiments concerning the aviation fuel are completely carried out. He was published 6 research articles in reputed journals. His main research interests are polymer nanocomposites, solid polymer electrolytes, nanomaterials and its applications.
Abdo Hezam
Abdo Hezam received his M.Sc. in Physics from Osmania University in 2013. He is currently a PhD scholar in Materials Science at the University of Mysore. His research focuses on advanced nanomaterials for photocatalytic and photoelectrochemical CO2 reduction and H2 production.
Murad Q. A. Al-Gunaid
Murad Q. A. Al-Gunaid obtained Ph.D., (2019) degree from Department of Polymer Science and Technology, SJC Engineering collage, JSS campus, under Mysore University, Mysuru, India. He is a lecturer academic in Department of chemistry, Faculty of Education, University of Thamar, Dhamar, Yemen. He has more than 8 years of academic teaching experience and scientific research. He was published 13 research articles in reputed journals. His main research interests are polymer nanocomposites, solid polymer electrolytes, nanomaterials and its applications.
Somesh T.E
Somesh T. E. is a Ph.D research Scholar in Department of Polymer Science and Technology, JSS Research Foundation affiliated under University of Mysore, JSS S&T Campus, Mysuru, India. He is a full time research scholar. He has published 4 research articles in reputed journal. His main research interests are polymer nanocomposites, metal oxide decorated graphene based polymer nanocomposites and evaluation of performance towards applications.
Siddaramaiah
Siddaramaiah Basavarajaiah obtained Ph.D., (1993) degree from University of Mysore, Mysore, India. He worked as a Post Doctoral Research Fellow under Brain Korea (BK-21) Fellowship for a period of one year (2007), Chonbuk National University, South Korea. He visited University ofFederal, Rio de Janeiro, Brasil, two times (2005 and 2009) for a period of 3 months under UNESCO-TWAS visiting Fellowship. He is working as Dean, Professor& Head, Department of Polymer Science & Technology, JSS Science and Technology University, Mysore. He is the recipient of SERC Visiting Fellowship from DST, New Delhi (2000) and Visiting Scientist fellowship from IIT, Kharagpur (2000). He has authored more than 315 research articles in reputed referred journals, more than 280 conference papers, 12 book chapters, 4 review articles, one book, and is a co-inventor of 3 Indian patents. 27 students have successfully completed their Ph.D., degree and 9 Master degrees under his supervision.