ICP-OES analysis has been used to calculate the percentage of each element that is present in solution compared to the total that is present in both the solution and cathode (Table ). It shows that after 20 minutes, 99.9% of the Mn has been leached into solution along with 80.9% of the Li. This presumably corresponds to leaching the Mn and Li that constitute the LMO component of the cathode. In contrast, < 10% of the Ni and Al and around 30% of the Co is leached into solution. While this may appear to be a significant amount of Ni/Al/Co leaching, the concentration values (Table )