The development status of cathode material for polymer lithium-ion battery were summarized in this paper. The preparation process for a new kind of cathode material LiNi0.8Co0.2O2 was proposed. This material could improve discharge characteristics and reduce the cost when it was used for the manufacture of the polymer lithium-ion battery(PLB).Combining the sol-gel with the spray drying methods, adding polymer compound RB-1 to adjust performance of the colloid and controlling the calcination time and tempera...