Tungsten oxide coated nickel-rich ternary lithium ion battery positive electrode material and preparation method thereof

Abstract

The invention discloses a tungsten oxide coated nickel-rich ternary lithium ion battery positive electrode material, which comprises a nickel-rich ternary lithium ion battery positive electrode material and a surface coating material tungsten oxide thereof, and the nickel-rich ternary lithium ion battery positive electrode material is composed of a nickel cobalt manganese hydroxide precursor and a lithium source. The invention also discloses a preparation method of the tungsten oxide coated nickel-rich ternary lithium ion battery positive electrode material, which comprises the following steps: mixing the nickel cobalt manganese oxide precursor and a lithium source, continuously grinding, fully mixing and sintering to obtain the nickel-rich ternary lithium ion battery positive electrode material, dissolving tungsten oxide in ammonia water, and drying to obtain the tungsten oxide coated nickel-rich ternary lithium ion battery positive electrode material. And finally, fully mixing the nickel-rich ternary lithium ion battery positive electrode material with the dried tungsten oxide ammonia water precipitate, and sintering to prepare the tungsten oxide coated nickel-rich ternary lithium ion battery positive electrode material. The tungsten oxide coated nickel-rich ternary lithium ion battery positive electrode material is low in cost, high in stability and low in impedance value, the prepared battery is high in specific capacity, the service life of the battery is effectively prolonged, and the safety of the battery is effectively improved.

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