The invention relates to the field of
lithium ion battery materials and particularly relates to a preparation technology for spherical
lithium cobalt oxide doped with Ti, Mg and Al. According to the preparation technology, pure water serves as base solution under the conditions that temperature ranges from 40 DEG C to 80 DEG C and a stirring speed is controlled to 60-180 r / min,
ammonium bicarbonate is added into the base solution to adjust the
alkalinity of the base solution to range from 5 to 30,
cobalt-salt
mixed solution and
ammonium bicarbonate solution are continuously pumped into the base solution in parallel flow and are subjected to
sedimentation reaction under the temperature of 40-80 DEG C, the
solid content and the
alkalinity of
slurry in a
reaction system are controlled, reaction feed liquid flows out continuously from an overflow gate at the upper part of a reaction kettle to enter into an
ageing kettle and then is washed by a washing press and dried by a vacuum drier, spherical
cobalt carbonate is subjected to primary
calcination to obtain cobaltosic
oxide, and the cobaltosic
oxide and a
lithium source are subjected to secondary
calcination to obtain the spherical
lithium cobalt oxide doped with Ti, Mg and Al. According to the invention, the process is simple, the reaction is easy to control, the production cost is low, the product application range is wide, and thus, the method is relatively large in production value; and the spherical
lithium cobalt oxide is stable in performance and better in overcharging prevention performance.