2D Hexagonal Boron Nitride - Molybdenum Disulfide Nanocomposite Supercapacitor Electrodes

Two-dimensional (2D) materials are very promising as supercapacitor electrodes due to their high specific surface area. In recent years, significant attention has been focused to environmentally friendly 2D hexagonal boron nitride (h-BN), since pristine 2D h-BN has many applications in high-temperature instruments and as a substrate for the growth of other 2D materials. However, its electrically insulating character in pristine form limits its utilization in electrochemistry and in electronic applications. Formation of nanocomposites with a conducting complementary materials offers a solution to this problem. In this study, we fabricated 2D h-BN/MoS2 nanocomposite electrodes using solution phase synthesis routes and evaluated their electrochemical performance for supercapacitors. Prior to preparation of the electrodes both h-BN and MoS2 were chemically exfoliated. Electrochemical properties such as specific capacity and capacity retention of the fabricated nanocomposite electrodes were examined through cyclic voltammetry, chronopotentiometry and electrochemical impedance spectroscopy in three electrode configuration. Obtained results were compared to that of the control sample fabricated from bare MoS2 nanosheets. In order to determine the effect of electrolyte type on the electrochemical properties of the nanocomposite electrodes, various aqueous solutions, such as sodium sulfate (Na2SO4), hydrochloric acid (H2SO4) and potassium hydroxide (KOH) were investigated. Fabricated supercapacitor electrodes showed encouraging specific capacitance values exceeding 100 F/g. A comprehensive analysis on the electrochemical properties of the fabricated supercapacitor will be presented.
Citation Formats
A. Aydınlı and H. E. Ünalan, “2D Hexagonal Boron Nitride - Molybdenum Disulfide Nanocomposite Supercapacitor Electrodes,” presented at the Materials Research Society Fall Meeting 2019 (1 - 06 Aralık 2019), Massachusetts, Amerika Birleşik Devletleri, 2019, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/84634.