Designing of Green-synthesized-AgS@CdS@MoSe2//AC asymmetric device for renewable energy storage and oxygen reduction reaction applications

Transition metal dichalcogenides (TMDs) semiconductor materials, a 2D layered structure, have obtained significance in energy storage systems due to their large surface area and charge transport. In this study, nanoparticles of the metal sulfides AgCdS and a composite AgCdS@MoSe₂ were synthesized using a green process involving the sweet cherry, which was then utilized as electrodes to be implemented in supercapacitors. A three-electrode arrangement was employed to study the electrochemical performance of all samples. Among all nanocomposites, AgCdS@MoSe₂ displayed superior performance, having a specific capacity (Csp) of 865.3 F g⁻¹ at 5 mV/s, dominating the MoSe₂ and AgCdS alone. AgCdS@MoSe₂ and activated carbon (AC) were used to build a hybrid asymmetric device where AgCdS@MoSe₂ and AC were used as positive and negative electrodes, respectively. Moreover, the AgCdS@MoSe₂ electrode attained an outstanding 94 % coulombic efficiency and displayed prolonged cyclic consistency by retaining 90 % of its capacitance after 7000 cycles. Besides, the AgCdS@MoSe₂ nanocomposite electrode is used for the oxygen reduction reaction. The electrode showed high performance in nitrogen (N₂) and oxygen (O₂) atmospheres. The performance shown by these synthesized materials displays their potential to be employed as favorable contestants for supercapacitors.