Effects of Li source and calcination temperature on the electrochemical properties of LiNi0.5Co0.2Mn0.3O2 lithium-ion cathode materials

► Instead of ammonia, oxalic acid was used as chelating agent to prepare the hydroxide precursor. ► Effects of Li source and calcination temperature on physical and electrochemical properties were investigated. ► LiCO3 was considered as a more suitable Li source, compared with LiNO3. ► The optimal calcination temperature was considered to be 850 °C. ► This sample exhibited excellent discharge capacity, cycle stability and rate capability.