Patent ID: 10714749

Abstract:
A high-rate lithium cobaltate cathode material, which contains a multi-channel network formed by fast ionic conductor LiαM′γOβ, mainly consists of lithium cobaltate. The lithium cobaltate is melted together with the fast ionic conductor LiαM′γOβ in the form of primary particles to form secondary particles. Besides, the lithium cobaltate is embedded in the multi-channel network formed by fast ionic conductor LiαM′γOβ. The element M′ in LiαM′γOβ is one or more of Ti, Zr, Y, V, Nb, Mo, Sn, In, La, W and 1≤α≤4, 1≤γ≤5, 2≤β≤12. The lithium cobaltate cathode material is mainly obtained by uniformly mixing cobaltous oxide impregnated with a hydroxide of M′ and lithium source, then by the sintering reaction in an air atmosphere furnace at a high temperature. The product of the present invention can greatly promote the lithium ion conductivity of the lithium cobaltate cathode material during the charging and discharging process of the lithium-ion battery, and improve the rate performance of the material.