Electrocatalytic and structural properties and computational calculation of PAN-EC-PC-TPAI-I2gel polymer electrolytes for dye sensitized solar cell application
| Autor: | Jamal Uddin, Hossain M. Zabed, Shahidul M. Islam, Mayeen Uddin Khandaker, Abdul Kariem Arof, M. Rezaur Rahman, M. Razaul Karim, Faisal I. Chowdhury, Ibrahim Khalil, Jahidul Islam |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Chemical Engineering Analytical chemistry Polyacrylonitrile 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Dielectric spectroscopy chemistry.chemical_compound chemistry Linear sweep voltammetry Propylene carbonate Ionic conductivity Triiodide Fourier transform infrared spectroscopy 0210 nano-technology Ethylene carbonate |
| Zdroj: | RSC Advances. 11:22937-22950 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/d1ra01983j |
| Popis: | In this study, gel polymer electrolytes (GPEs) were prepared using polyacrylonitrile (PAN) polymer, ethylene carbonate (EC), propylene carbonate (PC) plasticizers and different compositions of tetrapropylammonium iodide (TPAI) salt. Linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) measurements were done using non-blocking Pt-electrode symmetric cells. The limiting current (Jlim), apparent diffusion coefficient of triiodide ions and exchange current were found to be 12.76 mA cm−2, 23.41 × 10−7 cm2 s−1 and 11.22–14.24 mA cm−2, respectively, for the GPE containing 30% TPAI. These values are the highest among the GPEs with different TPAI contents. To determine the ionic conductivity, the EIS technique was employed with blocking electrodes. The GPE containing 30% TPAI exhibited the lowest bulk impedance, Rb (22 Ω), highest ionic conductivity (3.62 × 10−3 S cm−1) and lowest activation energy. Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) techniques were utilized for structural characterization. Functional group interactions among PAN, EC, PC and TPAI were studied in the FTIR spectra of the GPEs. An up-shift of the XRD peak indicates the polymer–salt interaction and possible complexation of the cation (TPA+ ion) with the lone pair of electrons containing site –CN at the N atom in the host polymer matrix. On the other hand, computational study shows that TPAI-PAN based GPE possesses the lowest frontier orbital bandgap, which coincided with the enhanced electrochemical and electrocatalytic performance of GPE. The dye-sensitized solar cell (DSSC) fabricated with these GPEs showed that the JSC (19.75 mA cm−2) and VOC (553.8 mV) were the highest among the GPEs and hence the highest efficiency, η (4.76%), was obtained for the same electrolytes. |
| Databáze: | OpenAIRE |
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