Electrochemical Performance of Layer-Structured Ni(0.8)Co(0.1)Mn(0.1)O(2) Cathode Active Materials Synthesized by Carbonate Co-Precipitation

The layered Ni-rich NiCoMn (NCM)-based cathode active material Li[Ni(x)Co((1−x)/2)Mn((1−x)/2)]O(2) (x ≥ 0.6) has the advantages of high energy density and price competitiveness over an LiCoO(2)-based material. Additionally, NCM is beneficial in terms of its increasing reversible discharge capacity with the increase in Ni content; however, stable electrochemical performance has not been readily achieved because of the cation mixing that occurs during its synthesis. In this study, various layer-structured Li(1.0)[Ni(0.8)Co(0.1)Mn(0.1)]O(2) materials were synthesized, and their electrochemical performances were investigated. A NiCoMnCO(3) precursor, prepared using carbonate co-precipitation with Li(2)CO(3) as the lithium source and having a sintering temperature of 850 °C, sintering time of 25 h, and metal to Li molar ratio of 1.00–1.05 were found to be the optimal parameters/conditions for the preparation of Li(1.0)[Ni(0.8)Co(0.1)Mn(0.1)]O(2). The material exhibited a discharge capacity of 160 mAhg(−1) and capacity recovery rate of 95.56% (from a 5.0–0.1 C-rate).