One-Step Solvothermally Synthesized Ni Doped MoS2@SnS2 Nanocomposite as a High Performance Supercapacitor Electrode Material

Abstract

In the present study, a Ni doped bimetallic sulfide Ni-MoS₂@SnS₂ flower-like nanocomposite is synthesized via a facile one-step solvothermal method. The Ni-MoS₂@SnS₂ with the unique structure and composition demonstrates superior supercapacitor performance (a specific capacitance of approximate 1150, and 878 F cm⁻² at the current density of 0.5 mA cm⁻² and 5 mA cm⁻², respectively) in comparison to sole SnS₂ (a specific capacitance of about 486, and 445 F cm⁻² at the same parameters). This remarkable enhancement in the electrochemical performance of Ni-MoS₂@SnS₂ may be attributed to synergic effect of bimetallic sulfides with flower-like structure as fast electronic transport and minimal volume variation of the formation of nanocomposite. More precisely, it exhibits 57.53 Wh kg⁻¹, 1500.78 W kg⁻¹ energy and power density at 0.5 mA cm⁻², respectively, along with the better capacity retention of 85.2 % at 1 mA cm⁻² even after 5000 constructive charge-discharge cycles. It is viable approach for the development and design of novel type electrode materials featuring with flower -like structure is proposed to enhance the structural stability of supercapacitor.