CeO2-PANI-HCl and CeO2-PANI-PTSA composites: synthesis, characterization, and utilization as supercapacitor electrode materials
The excellent cyclic efficiency, superior reversible charge/discharge rate, and high specific power density have made supercapacitors an important class of energy storage systems in recent time. In this study, two nano-ceria-based composites were developed to use as electrode materials in supercapac...
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Veröffentlicht in: | Ionics 2020-11, Vol.26 (11), p.5747-5756 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The excellent cyclic efficiency, superior reversible charge/discharge rate, and high specific power density have made supercapacitors an important class of energy storage systems in recent time. In this study, two nano-ceria-based composites were developed to use as electrode materials in supercapacitor applications. The composites were synthesized by combining ceria with conductive polyaniline (PANI) and doped with HCl and p-toluene sulfonic acid (PTSA). The materials were characterized by FTIR spectroscopy, SEM, XRD, and XPS techniques. Electrochemical studies were performed by cyclic voltammetry, galvanometric charge-discharge, and AC impedance spectroscopy. The CeO
2
-PANI doped with HCl and PTSA composites displayed ideal supercapacitor behavior showing higher capacitances up to 504 F g
−1
and 454 F g
−1
, respectively, at current density of 1 A g
−1
in comparison with pristine ceria (109 F g
−1
). Both the composites exhibited excellent specific energy (up to 100.8 W h kg
−1
) as well as outstanding specific power (up to 830 W kg
−1
). These findings support the possibility of these composites for practical applicability as electrode materials in energy storage devices. |
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ISSN: | 0947-7047 1862-0760 |
DOI: | 10.1007/s11581-020-03690-7 |