Physical investigations on pure and KBr doped poly(vinyl alcohol) (PVA) polymer electrolyte films for solid state battery applications
| Autor: | R. S. Karthikeya, M. Ravi, Y. Pavani, V. V. R. Narasimha Rao, S. Bhavani |
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| Rok vydání: | 2018 |
| Předmět: |
Vinyl alcohol
Materials science Potassium bromide Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Dielectric spectroscopy chemistry.chemical_compound Differential scanning calorimetry chemistry Ionic conductivity Solid-state battery Electrical and Electronic Engineering Fourier transform infrared spectroscopy 0210 nano-technology Ion transport number |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 29:5518-5524 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-018-8520-7 |
| Popis: | Potassium ion conducting polymer electrolyte films were prepared based on poly(vinyl alcohol) (PVA) complexed with 5, 10 and 15 wt% potassium bromide (KBr) salt using solution-casting technique. X-ray diffraction and Fourier transform infrared spectroscopy studies were used to determine the complexation of the KBr salt with polymer structure. Differential scanning calorimetry was used to determine the melting temperatures and relative crystallinity values of pure PVA and PVA:KBr complexed films. The conductivity of the polymer films was measured using impedance spectroscopy. Room temperature ionic conductivity was found to be a maximum (1.23 × 10−5 S cm−1) for the (PVA:KBr) (85:15) complexed film, whose K+ ion transport number was found to be 0.97. Electrochemical cells were fabricated in the configuration K/(PVA:KBr)/(I2 + C + Electrolyte) and their discharge characteristics were studied under a constant load of 100 kΩ. |
| Databáze: | OpenAIRE |
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