Single-Step Synthesis of Ni-Doped MoS₂ Nanostructures for Symmetrical Supercapacitor Devices

Abstract

As a contemporary and futuristic alternative to batteries, conventional supercapacitors (SCs) offer a potential candidate for renewable energy applications. Nevertheless, research present in this report focuses on the fabrication of high-performance quasi-solid-state supercapacitors (QSSCs) by hydrothermal means of nickel-doped MoS2 pompom-like nanostructures with varying nickel dopant concentrations (0, 1, 5, 10, and 20%). Optimal nickel concentrations are used to tune electrical conductivity, which affects electrochemical (EC) performance. With an excellent cycling stability of 77.83% after 5000 cycles, the 10% Ni-doped device presents an excellent specific capacitance of 156.8 mF cm–2 at 4 mA cm–2. The excellent EC properties of Ni-doped MoS2 pompom nanostructures allow them to be used as efficient electrode materials for SC applications and other related areas.