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Highly Wrinkled Porous Polypyrrole for the Enhancement of the Performance of an Fe<sub>2</sub>S<sub>3</sub>-Fe<sub>2</sub>O<sub>3</sub>/poly-<i>O</i>-amino Benzenethiol Supercapacitor from a Basic Medium
oleh: Mohamed Rabia, Maha Abdallah Alnuwaiser, Fuead Hasan, Ahmed Adel A. Abdelazeez
Format: | Article |
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Diterbitkan: | MDPI AG 2023-10-01 |
Deskripsi
In this study, <i>O</i>-amino benzenethiol (OABT) was oxidized in one pot using Fe(NO<sub>3</sub>)<sub>3</sub> to produce a novel Fe<sub>2</sub>S<sub>3</sub>-Fe<sub>2</sub>O<sub>3</sub>/poly <i>O</i>-amino benzenethiol (POABT), which showed a highly uniform morphology. At the same time, from SEM analysis, highly wrinkled porous polypyrrole (Ppy) and porous ball-like POABT structures prepared from the K<sub>2</sub>S<sub>2</sub>O<sub>8</sub> route were evidenced by SEM and TEM analyses. A nanocomposite pseudo-supercapacitor (SC) was fabricated using Fe<sub>2</sub>S<sub>3</sub>-Fe<sub>2</sub>O<sub>3</sub>/POABT, and its performance was tested with and without incorporating Ppy in the paste. The results indicate that Ppy significantly increased the specific capacitance (C<sub>S</sub>) values, indicating an enhancement in charge storage. At a current density of 0.2 A/g, the C<sub>S</sub> values were 44 F/g and 161 F/g for the paste without and with Ppy, respectively. Additionally, the E was calculated, and the incorporation of Ppy resulted in a significant increase in E, reaching 30 W.h.kg<sup>−1</sup>; this was significantly higher than the value of 8.18 W.h.kg<sup>−1</sup> observed without Ppy materials. This effect is likely due to the improved charge transfer facilitated by the presence of Ppy, as evidenced by the Nyquist plot, where the R<sub>ct</sub> values were 1.1 Ω and 2.1 Ω with and without Ppy, respectively. Overall, the low cost and significant technical advantages of this capacitor make it a promising candidate for commercial applications.