Abstract

This article presents the electrochemical results that can be achieved for pure LiNiO₂ cathode material prepared with a simple, low-cost, and efficient process. The results clarify the roles of the process parameters, precipitation temperature, and lithiation temperature in the performance of high-quality LiNiO₂ cathode material. Ni(OH)₂ with a spherical morphology was precipitated at different temperatures and mixed with LiOH to synthesize the LiNiO₂ cathode material. The LiNiO₂ calcination temperature was optimized to achieve a high initial discharge capacity of 231.7 mAh/g (0.1 C/2.6 V) with a first cycle efficiency of 91.3% and retaining a capacity of 135 mAh/g after 400 cycles. These are among the best results reported so far for pure LiNiO₂ cathode material.