SEM images of the cathode after 20 minutes of leaching show voids across the surface (Figure ), consistent with areas where the LMO particles have been leached from the cathode surface. EDX images show that there is also a lower Mn content across the entire surface. In contrast, there is a higher Ni content across the surface with areas of higher Ni content corresponding to areas where large particle agglomerations remain in the SEM image. The morphology of these larger particles appears to have been retained. This provides further evidence to support the conclusion that the LO phase remains during the leaching process. EDX analysis of the areas that are high in Ni suggests that the LO has a TM molar ratio (Ni:Mn:Co:Al) of 0.77:0.02:0.15:0.05. This ratio matches well to that of NCA other than the presence of a small amount of Mn. This could be due to incomplete leaching of the LMO phase, Mn-doping into the NCA structure or reaction between the two electrode phases during manufacture of the blended cathode.