For example, if we start with a material that is 70% Br, 30% Cu, and we increase the fraction of bromine until 100% bromine is approached, the uncorrected DFT formation energy, E DFT -E DFT_reference , will approach zero regardless of the calculation details. However, if we apply a formation energy correction for bromine, as is done in the standard correction method, then the "corrected" formation energy will approach bromine's energy correction value, not zero.