Effect of electrode loading on the electrochemical performance of LiAl0.1Mn1.9O4 cathode for lithium-ion batteries

LiAl_0.1Mn_1.9O₄ spinel oxide was synthesized by combustion method and investigated as cathode material for Li-ion batteries, taking into account the effect of (i) the type of current collector and (ii) the electrode mass loading. Two different substrates were employed as current collectors: Al foil and carbon paper. The materials with higher loading showed an outstanding capacity retention in rate capability test. Although the samples with lower loading started with higher capacities, they showed poor capacity retention. From a practical point of view, the electrode with 4 mg loading per cm² presented attractive properties with respect to elevated specific capacity and high retention in long-term stability tests.