Self-assembled 3D hierarchical Mo2S3 flowers from wrinkled sheets for enhanced electrochemical energy storage performance

Abstract

In this study, wrinkled sheets of molybdenum sulfide Mo₂S₃ were self-assembled into 3D hierarchical flowers via a simple hydrothermal technique. Additionally, binary (Mo₂S₃/CNTs) and ternary (Mo₂S₃/CNTs/gCN) composites were synthesized through ultrasonication route. Synergistic effect of 3D Mo₂S₃ flowers with 1D CNTs and gCN strengthen and heighten electrochemical properties of Mo₂S₃/CNTs/gCN composite. The GCD data of Mo₂S₃/CNTs/gCN composite endorsed greatest specific capacitance 1309 F/g at 1 A/g with highest discharge time period (1414 s). Though, the discharge time for Mo₂S₃/CNTs and Mo₂S₃ was 495 s and 330 s with specific capacitance 458 F/g and 306 F/g respectively. The significantly improved electrochemical properties of Mo₂S₃/CNTs/gCN composite professed via CV curves and GCD data are authorized to the outstanding architecture of the material. The Mo₂S₃/CNTs/gCN composite also shows greater ion diffusion and outstanding capacitive behavior. In composite electrode, Mo₂S₃ flowers with CNTs and gCN organize a unique architecture which improves the ionic movement in all the three directions due to 3D hierarchical structure. In conclusion, the advanced proficiency of our as-designed working electrode (Mo₂S₃/CNTs/gCN composite) is a promising choice for energy storage systems.