Encapsulated ternary positive electrode material, preparation method thereof and lithium ion battery
A technology of positive electrode materials and positive electrode active materials, which is applied in the field of new energy, can solve the problems of high nickel material gas production, etc., achieve good cycle stability and safety performance, high first effect, and ensure the effect of normal release
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Embodiment 1
[0057] This embodiment provides a coated ternary positive electrode material, comprising a ternary positive electrode active material core co-doped with aluminum, zirconium and fluorine and a cladding layer coated on the surface of the core core, the cladding layer comprising phosphoric acid Hydrogen zirconium and boron compound, said boron compound is boron oxide and lithium borate;
[0058] Wherein, based on the total mass of the inner core, the total mass concentration of aluminum, zirconium and fluorine is 3000ppm, the mass concentration of the cladding layer is 3500ppm, and the mass proportion of the zirconium hydrogen phosphate in the cladding layer is 57%.
[0059] The preparation method of the above-mentioned coated ternary positive electrode material comprises the following steps:
[0060] ① Precursor synthesis: First weigh soluble nickel salt, soluble cobalt salt and soluble manganese salt according to the molar ratio of 8:1:1 to prepare nickel-cobalt-manganese terna...
Embodiment 2
[0067] This embodiment provides a coated ternary positive electrode material, comprising a ternary positive electrode active material core co-doped with aluminum, zirconium and fluorine and a cladding layer coated on the surface of the core core, the cladding layer comprising phosphoric acid Hydrogen zirconium and boron compound, said boron compound is boron oxide and lithium borate;
[0068] Wherein, based on the total mass of the inner core, the total mass concentration of aluminum, zirconium and fluorine is 5000ppm, the mass concentration of the cladding layer is 4000ppm, and the mass proportion of the zirconium hydrogen phosphate in the cladding layer is 75%.
[0069] The preparation method of the above-mentioned coated ternary positive electrode material comprises the following steps:
[0070] ① Precursor synthesis: first weigh soluble nickel salt, soluble cobalt salt and soluble manganese salt according to the molar ratio of 83:11:6 to prepare nickel-cobalt-manganese ter...
Embodiment 3
[0077] This embodiment provides a coated ternary positive electrode material, comprising a ternary positive electrode active material core co-doped with aluminum, zirconium and fluorine and a cladding layer coated on the surface of the core core, the cladding layer comprising phosphoric acid Hydrogen zirconium and boron compound, said boron compound is boron oxide and lithium borate;
[0078] Wherein, based on the total mass of the inner core, the total mass concentration of aluminum, zirconium and fluorine is 4000ppm, the mass concentration of the cladding layer is 2700ppm, and the mass proportion of the zirconium hydrogen phosphate in the cladding layer is 74%.
[0079] The preparation method of the above-mentioned coated ternary positive electrode material comprises the following steps:
[0080] ① Precursor synthesis: according to the molar ratio of 88:9:3, first weigh soluble nickel salt, soluble cobalt salt and soluble manganese salt to prepare nickel-cobalt-manganese ter...
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