Quantum Capacitance of Mo2N MXene for Supercapacitor Applications

Abstract MXenes for supercapacitor (SC) electrodes is a very promising area of research. Supercapacitors are still behind batteries when to be used as primary energy source due to their low energy densities. Hence, additional research is vital to explore materials like MXenes for SC electrodes. The electronic properties of molybdenum nitride Mo 2 N are studied and its quantum capacitance (QC) is calculated to explore its potential for SC electrodes. The MXene is found to be metallic in nature. The QC values for Mo 2 N MXene are extremely high around Fermi level. Maximum value of 746.69 µF cm −2 is achieved which is way higher than that of graphene. The value remains high for the negative bias voltage as well.