Cobalt disulfide/polypyrrole cauliflower-like nanocomposite: Single-pot hydrothermal synthesis, characterization, and their enhanced storage energy in supercapacitors

• Published in: Journal of alloys and compounds Vol. 951; p. 169965
• Main Authors: Hasanzadeh, Marziyeh, Ansari, Reza, Farahpour, Mona
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.08.2023
• Subjects: Cobalt disulfide; Energy storage device; Hydrothermal synthesis; Nanocomposite; Polypyrrole; Supercapacitor; Supercapacitor; Nanocomposite; Hydrothermal synthesis; Energy storage device; Cobalt disulfide; Polypyrrole
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2023.169965

This study investigates the effectiveness of CoS2/PPy nanocomposites as electrode materials for supercapacitors. We performed a simple and effective one-step hydrothermal fabrication of these nanostructures on nickel foam as substrate. After accurate characterization, electrochemical studies were performed using various techniques, such as cyclic voltammetry (CV), galvanostatic discharge (GCD), and electrochemical impedance spectroscopy (EIS). The result shows excellent electrochemical behaviour of the synthesized electrode with a specific capacitance of 605.2 C g−1 at a current density of 1 A g−1. Moreover, considerable capacitance retention (∼90.9% after 5000 cycles) was obtained. Next, an asymmetric supercapacitor was developed using a prepared electrode and activated carbon (AC /Ni foam) as cathode and anode, respectively. The device showed a high specific energy of 88.07 Wh kg−1 with a significant power of 4.95 kW kg−1 at an operating voltage of These unexpected results indicate that the CoS2/PPy nanostructure has the potential to become a promising electrode for energy storage systems. •The demand to enhance energy production and storage technologies has increased as natural energy supplies become scarcer.•Due to their many benefits, supercapacitors have been the subject of studies and papers in the realm of energy production and storage.•The new electrode material for use in electrochemical supercapacitors, which was made using a very straightforward and effective process, has been introduced and studied in the current research.•The major goal of this research is to create an effective electrode material for an electrochemical supercapacitor by utilizing the synergistic effects of a transition metal sulfide and the redox reactions of a conductive polymer to maximize the benefits.•The suggested modified electrode may be a competitive electrode material for usage in renewable energy suppliers and provide greater chances for a variety of future applications in power augmentation systems.