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MXenes are a family of two-dimensional materials that could be attractive foruse as electrodes in lithium batteries due to their high specific capacity. Forthis purpose, it is necessary to evaluate magnitudes such as the lithiumadsorption energy and the magnitude of the open-circuit voltage for differentlithium concentrations. In this paper, we show through first principlescalculations that in a V$_2$C monolayer we must consider the high correlationbetween the electrons belonging to vanadium to obtain correct results of thesequantities. We include this correlation employing the Hubbard couplingparameter obtained by a linear response method. We found that the system isantiferromagnetic and that the quantities studied depend on the magnetic phaseconsidered. Indirectly, experimental results could validate the theoreticalvalue of the theoretical Hubbard parameter.

V$_2$C-based lithium batteries: The influence of magnetic phase and Hubbard interaction