Influence of Aging Process on the Crystalline Structure and Electrochemical Properties of LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> Cathode Material
Ni 0.8 Co 0.1 Mn 0.1 (OH) 2 precursors prepared by co-precipitation method were served to synthesize LiNi 0.8 Co 0.1 Mn 0.1 0 2 cathode materials by sintering with LiOH·H 2 O at high temperature. It is shown from XRD analysis and electrochemical measurements that these precursors synthesized at different aging time are all composed of two phases, α-Ni (OH) 2 and β-Ni (OH) 2 .With aging process lasting longer,relatively content of α-Ni (OH) 2 in precursors increase , peak intensity ratios of I (003) /I (104) in LiNi 0.8 Co 0.1 Mn 0.1 0 2 get larger, the more complete of layer structure, the lower of Li + /Ni 2+ cation mixing. Results indicate that the existence and content increase of α-Ni (OH) 2 phase with aging process lasting can inhibit the cation mixing efficaciously. LiNi 0.8 Co 0.1 Mn 0.1 0 2 obtained from precursor aged 12h has a good cyclic performance, capacity retention rate reaches 92.8% after 30 cycles.