Highly Wrinkled Porous Polypyrrole for the Enhancement of the Performance of an Fe 2 S 3 -Fe 2 O 3 /poly- O -amino Benzenethiol Supercapacitor from a Basic Medium.

In this study, O-amino benzenethiol (OABT) was oxidized in one pot using Fe(NO₃)₃ to produce a novel Fe₂S₃-Fe₂O₃/poly O-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 K₂S₂O₈ route were evidenced by SEM and TEM analyses. A nanocomposite pseudo-supercapacitor (SC) was fabricated using Fe₂S₃-Fe₂O₃/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_S) values, indicating an enhancement in charge storage. At a current density of 0.2 A/g, the C_S 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⁻¹; this was significantly higher than the value of 8.18 W.h.kg⁻¹ 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_ct 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. [ABSTRACT FROM AUTHOR]