Electrochemical properties of LiNi1−yCoyO2 (y = 0.1, 0.3 and 0.5) synthesized from LiOH·H2O, NiO and Co3O4 by solid state reaction method

LiNi1−yCoyO2 (y = 0.1, 0.3 and 0.5) were synthesized by solid state reaction method at 750 °C and 850 °C from LiOH·H2O, NiO and Co3O4 as starting materials. The electrochemical properties of the synthesized LiNi1−yCoyO2 were investigated. The synthesized LiNi1−yCoyO2 had a α-NaFeO2 structure with a space group of R3¯m. Among all of the prepared LiNi1−yCoyO2 (y = 0.1, 0.3 and 0.5) samples, LiNi0.7Co0.3O2 calcined at 850 °C for 40 h had the largest first discharge capacity of 146.2 mAh/g and a relatively low discharge capacity fading rate.