The cathode materials LiNixCo1-xO2(0≤x≤1) for lithium ion battery were prepared in solid phase. The effects of synthesis temperature, the time of heat treatment and also the ratio of raw materials on products were discussed. The results showed that the products preheated under 600℃ and then sintered under constant temperature 750℃ were better than those sintered under constant temperature 650℃ or 850℃,and their layer structures were more obvious and their initial capacity was higher. The longer the heat-treating time is,the stronger the products' XRD peaks intensity and the better their structures and electrochemical performance are. The samples LiNixCo1-xO2(0≤x≤1) with a perfect structure and electrochemical performance were synthesized. And the products initial capacity was perfect when n(Li)∶n(Ni)∶n(Co)=1.15∶0.3∶0.7,viz. 156.146mAh/g.
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