One step hydrothermal synthesis of 3D CoS2@MoS2-NG for high performance supercapacitors.

A three-dimensional (3D) MoS₂ coated CoS₂-nitrogen doped graphene (NG) (CoS₂@MoS₂-NG) hybrid has been synthesized by a one step hydrothermal method as supercapacitor (SC) electrode material for the first time. Such a composite consists of NG embedded with stacked CoS₂@MoS₂ sheets. With a 3D skeleton, it prevents the agglomeration of CoS₂@MoS₂ nanoparticles, resulting in sound conductivity, rich porous structures and a large surface area. The results indicate that CoS₂@MoS₂-NG has higher specific capacitance (198 F g⁻¹ at 1 A g⁻¹), better rate performance (with about 56.57% from 1 to 16 A g⁻¹) and an improved cycle stability (with about 96.97% after 1000 cycles). It is an ideal candidate for SC electrode materials. [ABSTRACT FROM AUTHOR]