Sustainable in-situ synthesis of BaS2:Cu8S5:LaS tri-metal chalcogenide via diethyldithiocarbamate precursors for high-performing energy storage systems

Abstract

Current work, for the first time, reports the synthesis of the novel BaS2:Cu8S5:LaS ternary chalcogenide for utilization in the energy storage devices owing to its superior capacitive performance. BaS2:Cu8S5:LaS was marked by remarkable optical behavior with the narrowed band gap energy i.e. 2.55 eV. Crystallographic analysis is indicative of the 16.77 nm average crystallite size. The presence of the metal sulphide bonds was confirmed by the vibrational stretches between 420 – 890 cm−1. Rod shaped particles with the suspended spheres was the predominant morphology. With the augmented redox behavior and charging-discharging behavior, fabricated electrode attained the auspicious specific capacitance of 1299F/g. Furthermore, the specific power density obtained for this electrode was 11166 W kg−1. The enhanced electrochemical performance was also exhibited by the elevated electrical conductivity showing the equivalent series resistance (Rs) = 0.48 Ω.