Comparison of lithium nickel cobalt oxides synthesized from NiO, Co3O4, and LiOH·H2O or Li2CO3 by solid-state reaction method

LiNi1−yCoyO2 (y = 0.1, 0.3 and 0.5) cathode materials were synthesized by the solid-state reaction method at different temperatures from LiOH·H2O, NiO and Co3O4 and from Li2CO3, NiO and Co3O4 as the starting materials. The physical and electrochemical properties of the synthesized samples were then compared. Among LiNi1−yCoyO2 (y = 0.1, 0.3 and 0.5) synthesized for 40 h from LiOH·H2O, NiO and Co3O4, and from Li2CO3, NiO and Co3O4, LiNi0.5Co0.5O2 synthesized from Li2CO3, NiO and Co3O4 at 800 °C has relatively large first discharge capacity and relatively good cycling performance. This sample is considered the best one with relatively good electrochemical properties.