  MXenes are a family of two-dimensional materials that could be attractive for
use as electrodes in lithium batteries due to their high specific capacity. For
this purpose, it is necessary to evaluate magnitudes such as the lithium
adsorption energy and the magnitude of the open-circuit voltage for different
lithium concentrations. In this paper, we show through first principles
calculations that in a V$_2$C monolayer we must consider the high correlation
between the electrons belonging to vanadium to obtain correct results of these
quantities. We include this correlation employing the Hubbard coupling
parameter obtained by a linear response method. We found that the system is
antiferromagnetic and that the quantities studied depend on the magnetic phase
considered. Indirectly, experimental results could validate the theoretical
value of the theoretical Hubbard parameter.
