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

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. The concentration of molybdenum disulfide was 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 framework of Z67.Ni inhibits MS nanosheets from restacking over repeated charge and discharge cycles, which is why this specific nanocomposite was chosen. The superior synergistic impact of Z67.Ni crystals and MS nanosheets was established by the improved electrochemical behavior of Z67.Ni with 70 % weight percent of MS (Z67.Ni/MS7). This combination exhibited a specific capacitance of 308.5 F/ g at 1 A g−1 and a power density (Pd) of 2.78 kW kg−1 along with an exceptional energy density (Ed) of 83.98 W h kg−1. These impressive results highlight the high efficiency of this nanocomposite material for supercapacitor applications.