Synergistic interaction between molybdenum disulfide nanosheet and metal organic framework for high performance supercapacitor

Abstract

Abstract Zeolitic imidazolate framework-67 crystals (ZIF-67) anchored molybdenum disulfide nanosheets (MS) have been synthesized via a hydrothermal approach followed by a simple chemical method. MS concentration has been varied to investigate its impact on the electrochemical efficiency within the electrode nanocomposite. The shiny spot of this composite is the combination of two desirable properties, the conductive path created by MS, and the structural framework support provided by Zeolitic imidazolate framework-67 intercalated with nickel (Z67.Ni). The reason behind this choice of this specific nanocomposite is the framework of the Z67.Ni that prevents MS nanosheets from restacking during the repeated charge and discharge cycles. Superior electrochemical behavior of Z67.Ni with 70% weight percent of MS (Z67.Ni/MS7) demonstrated the excellent synergistic effect between Z67.Ni crystals and MS nanosheets. It has a specific capacitance of 308.5 F g− 1 at 1 A g− 1 and delivers an excellent energy density (Ed) of 83.98 W h kg− 1 with a power density (Pd) of 2.78 kW kg− 1. These excellent results demonstrate the high efficiency of this nanocomposite material in supercapacitor applications.