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Investigation of structure-property relations in chemically and magneticallydisordered materials can give rise to interesting physical phenomena. Thepotential of two-dimensional MXenes as electrodes in supercapacitorapplications have been studied extensively. However, the role of chemical andmagnetic disorder on their electrochemical parameters like the capacitance havenot been explored yet. In this work, we have systematically addressed this forV$_{2-x}$Mn$_{x}$CO$_{2}$ MXene solid solutions with an analysis based uponresults from first-principles electronic structure calculations. We find thatthe variations in the total capacitance over a voltage window depends upon thedegree of chemical and magnetic disorder. In course of our investigation, wealso found out that the magnetic structure on the surface can substantiallyinfluence the redox charge transfer, an yet unexplored phenomenon. Asignificantly large charge transfer and thus a large capacitance can beobtained by manipulating the chemical composition and the magnetic order of thesurfaces.These findings can be useful in designing operational supercapacitorelectrodes with magnetic constituents.

Effects of Chemical and magnetic disorder on the electrochemical properties of V$_{2-x}$Mn$_{x}$CO$_{2}$} MXene electrodes