As a new generation cathode material, Lithium nickel oxide (LiNiO2) is a promising cathode candidate for its low cost and high energy density, showing an attractive prospect at minitype-portable electric sources and large-scale power supplies. LiNiO2 and its partially substituted compounds have been studied intensively as a cathode material to replace the presently used LiCoO2. However, the electrochemical properties of LiNiO2 have been greatly affected by the generation of stiochiometric deviat...