Novel hydrothermally fabricated alkaline earth metal and transition metal sulfide (BaS/CuS) composite: An electrode for supercapacitor application

Abstract

The speedy utilization and exploitation of fossil fuels lead to establishment of an ecosystem marked by pollution and the depletion of energy resources. Nevertheless, expediting the progress of alternative approaches to generate energy and fabricate energy storage devices is crucial. In such cases, supercapacitors (SC) emerged as the most auspicious energy storage device in terms of performance. Supercapacitors can have their electrochemical efficiency enhanced by employing several electrode materials, including transition metal oxides, chalcogenides, perovskites, and spinel. As an electrode for improved SC applications, a new BaS/CuS composite was created in this work using a hydrothermal method. The physical characterizations confirmed the proof of successful fabrication. BET results show that the prepared composite of the BaS/CuS has enhanced surface area (87.4 m² g⁻¹). BaS/CuS composite electrode was tested in alkaline media via three electrode configurations, and it demonstrated the high C_s (908.7F/g at 1 A/g), high energy density, and power density of 68.6 Wh kg⁻¹ and 368.6 W kg⁻¹ respectively, and good cyclic stability. According to the previously described findings, the synthesized electrode is promising for supercapacitor use.