Effect of monomer concentration on the performance of Polyaniline based redox capacitors
Supercapacitors are promising alternatives for answering the thirst for ever increasing demand for power. They bridge the gap between the batteries and the conventional capacitors. Redox capacitors in the family of supercapacitors consist of conducting polymers or transition metal oxide electrodes....
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| Format: | Article |
| Language: | English |
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Faculty of Science, University of Peradeniya, Sri Lanka
2017-09-01
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| Series: | Ceylon Journal of Science |
| Subjects: | |
| Online Access: | https://cjs.sljol.info/articles/7440 |
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| author | W. A. D. S. S. Weerasinghe K. P. Vidanapathirana Kumudu S. Perera |
| author_facet | W. A. D. S. S. Weerasinghe K. P. Vidanapathirana Kumudu S. Perera |
| author_sort | W. A. D. S. S. Weerasinghe |
| collection | DOAJ |
| description | Supercapacitors are promising alternatives for answering the thirst for ever increasing demand for power. They bridge the gap between the batteries and the conventional capacitors. Redox capacitors in the family of supercapacitors consist of conducting polymers or transition metal oxide electrodes. In this study, symmetric redox capacitors have been fabricated utilizing Polyaniline electrodes and a Polyvinylidenefluoride based gel polymer electrolyte. The effect of aniline concentration on the performance of redox capacitors was investigated. Aniline concentration was varied from 0.20 M to 0.50 M. Capacitors were characterized using Electrochemical Impedance Spectroscopy, Cyclic Voltammetry and Galvanostatic Charge-Discharge tests. Redox capacitor with 0.40 M aniline concentration showed the highest performance. From EIS measurements it was shown that the lowest relaxation time was 0.22 s. This implies that 0.40 M aniline system has the fastest ion movement behavior. Cyclic Voltammetry (CV) test of this capacitor resulted 81% of specific capacity retention between the 1<sup>st </sup>and the 200<sup>th </sup>cycle. Galvanostatic Charge-Discharge (GCD) for 1000 cycles showed an average discharging capacity of 323 F g<sup>-1</sup>, power density of 760 W kg<sup>-1</sup> and energy density of 6.5 Wh kg<sup>-1</sup>. The results of this study confirm that aniline concentration has a significant effect on the performance of PANI films when they are served as electrodes in redox capacitors. |
| first_indexed | 2024-04-12T00:13:07Z |
| format | Article |
| id | doaj.art-d3e76098cde943d7910e77d07b0d6778 |
| institution | Directory Open Access Journal |
| issn | 2513-2814 2513-230X |
| language | English |
| last_indexed | 2024-04-12T00:13:07Z |
| publishDate | 2017-09-01 |
| publisher | Faculty of Science, University of Peradeniya, Sri Lanka |
| record_format | Article |
| series | Ceylon Journal of Science |
| spelling | doaj.art-d3e76098cde943d7910e77d07b0d67782022-12-22T03:55:54ZengFaculty of Science, University of Peradeniya, Sri LankaCeylon Journal of Science2513-28142513-230X2017-09-01463313710.4038/cjs.v46i3.74405648Effect of monomer concentration on the performance of Polyaniline based redox capacitorsW. A. D. S. S. Weerasinghe0K. P. Vidanapathirana1Kumudu S. Perera2Wayamba University of Sri Lanka, Kuliyapitiya, 60200Wayamba University of Sri Lanka, Kuliyapitiya, 60200Wayamba University of Sri Lanka, Kuliyapitiya, 60200Supercapacitors are promising alternatives for answering the thirst for ever increasing demand for power. They bridge the gap between the batteries and the conventional capacitors. Redox capacitors in the family of supercapacitors consist of conducting polymers or transition metal oxide electrodes. In this study, symmetric redox capacitors have been fabricated utilizing Polyaniline electrodes and a Polyvinylidenefluoride based gel polymer electrolyte. The effect of aniline concentration on the performance of redox capacitors was investigated. Aniline concentration was varied from 0.20 M to 0.50 M. Capacitors were characterized using Electrochemical Impedance Spectroscopy, Cyclic Voltammetry and Galvanostatic Charge-Discharge tests. Redox capacitor with 0.40 M aniline concentration showed the highest performance. From EIS measurements it was shown that the lowest relaxation time was 0.22 s. This implies that 0.40 M aniline system has the fastest ion movement behavior. Cyclic Voltammetry (CV) test of this capacitor resulted 81% of specific capacity retention between the 1<sup>st </sup>and the 200<sup>th </sup>cycle. Galvanostatic Charge-Discharge (GCD) for 1000 cycles showed an average discharging capacity of 323 F g<sup>-1</sup>, power density of 760 W kg<sup>-1</sup> and energy density of 6.5 Wh kg<sup>-1</sup>. The results of this study confirm that aniline concentration has a significant effect on the performance of PANI films when they are served as electrodes in redox capacitors.https://cjs.sljol.info/articles/7440conducting polymer, polyaniline, redox capacitor, gel polymer electrolyte, electrochemical impedance spectroscopy |
| spellingShingle | W. A. D. S. S. Weerasinghe K. P. Vidanapathirana Kumudu S. Perera Effect of monomer concentration on the performance of Polyaniline based redox capacitors Ceylon Journal of Science conducting polymer, polyaniline, redox capacitor, gel polymer electrolyte, electrochemical impedance spectroscopy |
| title | Effect of monomer concentration on the performance of Polyaniline based redox capacitors |
| title_full | Effect of monomer concentration on the performance of Polyaniline based redox capacitors |
| title_fullStr | Effect of monomer concentration on the performance of Polyaniline based redox capacitors |
| title_full_unstemmed | Effect of monomer concentration on the performance of Polyaniline based redox capacitors |
| title_short | Effect of monomer concentration on the performance of Polyaniline based redox capacitors |
| title_sort | effect of monomer concentration on the performance of polyaniline based redox capacitors |
| topic | conducting polymer, polyaniline, redox capacitor, gel polymer electrolyte, electrochemical impedance spectroscopy |
| url | https://cjs.sljol.info/articles/7440 |
| work_keys_str_mv | AT wadssweerasinghe effectofmonomerconcentrationontheperformanceofpolyanilinebasedredoxcapacitors AT kpvidanapathirana effectofmonomerconcentrationontheperformanceofpolyanilinebasedredoxcapacitors AT kumudusperera effectofmonomerconcentrationontheperformanceofpolyanilinebasedredoxcapacitors |