Some factors which affected the synthesis of Co304 precursor were studied. Cobalt chloride was selected as raw material, sodium carbonate as precipitant, the concentration of cobalt ion was 60 -70 g/L, the ratio（ mol ratio） of cobalt chloride and sodium carbonate was among 0.60 - 0.70, precipitant was added into cobalt chloride solution and pH value was controled among 9.0 - 9.6 during precip...
