High-voltage lithium cobalt oxide positive electrode material as well as preparation method and application thereof

The invention discloses a high-voltage lithium cobalt oxide positive electrode material and a preparation method and application thereof, the chemical formula of the high-voltage lithium cobalt oxide positive electrode material is LiCo1-x-yAxByO2, x is greater than 0 and less than or equal to 0.1, y is greater than 0 and less than or equal to 0.1, and A and B are respectively used for replacing Co. The high-voltage lithium cobalt oxide positive electrode material obtained by a solid phase method and a liquid phase method can be stably charged and discharged under the high charging cut-off voltage of 3.0-4.6 V, the capacity retention ratio of 100 cycles can reach 90% or above, the capacity retention ratio of 300 cycles can reach 80% or above, and the high-voltage lithium cobalt oxide positive electrode material has good market use prospects. 本发明公开了一种高电压钴酸锂正极材料及其制备方法和应用，高电压钴酸锂正极材料的化学式为：LiCo1-x-yAxByO2，0＜x≤0.1，0＜y≤0.1，A和B分别用于取代Co。固相法和液相法所获得的高电压钴酸锂正极材料能够在3.0-4.6V高充电截止电压下稳定充放电，100圈循环的容量保持率高达90％以上，300圈循环的容量保持率可在80％