Nickel-stabilized composite manganese oxides as lithium insertion electrode

The introduction of nickel atoms in Chemical Manganese Dioxide (CMD) is stu died as an alternative route for the stabilization of the structure of thes e solids. X-ray diffraction data evidence the incorporation of nickel in di fferent proportions in the poorly crystalline beta/gamma-MnO2 structure of these materials. Step Potential Electrochemical Spectroscopy (SPES) of lith ium anode cells using the nickel-modified solids as cathode material shows a significant improvement in the electrochemical performance upon cycling. (C) 1999 Elsevier Science S.A. All rights reserved.