Effect of citric acid content on synthesis of LiNi1/3Mn1/3Co1/3O2 and its electrochemical characteristics

LiNi1/3Mn1/3Co1/3O2 has been synthesized using different citric acid (chelating agent) contents to study the effect on morphology and electrochemical characteristics of the powdered compound synthesized. The citric acid content is expressed as R′ which is the ratio of citric acid to metal ions. The processing with large value of R′ yields the powder having particle size of about 200 nm. X-ray diffraction (XRD) analysis shows the powder has single phase layered rhombohedral structure. First cycle coulombic efficiency of the powder prepared with R′ = 3, is ∼93% in the voltage range of 4.6–2.5 V.