Enhanced synergistic redox activity of SrCoS/PANI for hybrid energy storage and oxygen evolution reaction

Abstract

Abstract Supercapacitors (SCs) and secondary batteries (SBs) are commonly utilized for energy storage, although each has some limitations: low energy density (Ed) and power density (Pd), respectively. To address these issues, a hybrid supercapacitor is a new emerging technique known as supercapattery, which combines both of these devices to optimum the Ed and Pd in a single setting. The hydrothermal method was adopted to synthesize a cost-effective, eco-friendly, and non-toxic SrCoS/PANI, a composite material for optimum results of supercapattery. Crystallinity and morphology study of synthesized nanocomposites strontium cobalt sulfide with Polyaniline (SrCoS/PANI) were examined using SEM and XRD techniques. Initially, the performance was tested using a three-electrode setup of nanocomposites (SrCoS/PANI) in 1 M KOH electrolyte. The effectiveness of a SrCoS/PANI-activated carbon two-electrode supercapattery was examined through cyclic CV, GCD, and EIS techniques. In the two electrodes setup, the device performs admirably with an astonishing specific capacity of 139.4 C g−1, a high Ed of 29.56 Wh kg−1, and a high Pd of 800 W kg−1 at 1.0 A g−1. The cyclic stability was tested by putting the device through 5000 charging and discharging cycles, which maintained 91.65% of its Specific capacity (Qs). A hybrid nanocomposite (SrCoS/PANI) device was accomplished, with exceptional electrochemical capabilities at a low price making them a fascinating active material with potential applications in supercapattery technology. The electrocatalytic performance of the synthesized nanostructure (NSs) was studied comprehensively with regard to an oxygen evolution reaction (OER).