def get_max_capvol(self, remove=True, insert=True, volume=None):
        """
        Give max capacity in mAh/cc for inserting and removing a charged cation into base structure.

        Args:
            remove: (bool) whether to allow cation removal
            insert: (bool) whether to allow cation insertion
            volume: (float) volume to use for normalization (default=volume of initial structure)

        Returns:
            max vol capacity in mAh/cc
        """

        vol = volume if volume else self.struc_oxid.volume
        return self._get_max_cap_ah(remove, insert) * 1000 * 1E24 / (vol * const.N_A)