Li1+δMn2−δO4 performance measured by leaching

Li–Mn–O spinel materials for Li-ion batteries were characterised by redox titration, controlled chemical de-lithiation and pH measurements in order to derive the capacity, rate performance and stability. These methods are shown to be fast and accurate. Furthermore, it is shown that the material with the composition of Li1.04Mn1.96O4 reveals the highest practical capacity and the lowest dissolution in water.