Nickel-stabilized composite manganese oxides as lithium insertion electrodes

The introduction of nickel atoms in Chemical Manganese Dioxide (CMD) is studied as an alternative route for the stabilization of the structure of these solids. X-ray diffraction data evidence the incorporation of nickel in different proportions in the poorly crystalline β/γ-MnO2 structure of these materials. Step Potential Electrochemical Spectroscopy (SPES) of lithium anode cells using the nickel-modified solids as cathode material shows a significant improvement in the electrochemical performance upon cycling.