COBALT STABILIZED LAYERED LITHIUM-NICKEL OXIDES, CATHODES IN LITHIUM RECHARGEABLE CELLS

In the present paper the effect of cobalt, as substituent, on the stab ilization of layered lithium-nickel oxides has been shown. Using an or iginal method of synthesis, the series LiCo1-xNixO2 (O<x<1), has been obtained and analysed by X-ray powder diffraction. The electrochemical characteristics has been obtained in a three-electrode glass cell usi ng standard electrolyte of 1 M LiClO4 in propylene carbonate:dimethyox yethene. It has been demonstrated by cyclic voltammetry that the rever sibility in the ternary Li-Ni-Co-O system increases with the Co conten t due to the enhanced stability and structural order of materials.