Modified high-nickel ternary positive electrode material and preparation method thereof
A cathode material, high nickel technology
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Embodiment 1
[0054] Example 1 Preparation of a modified high nickel ternary positive electrode material
[0055] (1) Preparation of nickel-cobalt-manganese hydroxide precursor coated with cobalt element on the surface:
[0056] Dissolve 45.82 g of cobalt chloride hexahydrate in 120 mL of deionized water to prepare a cobalt chloride aqueous solution, and place the cobalt chloride aqueous solution in a spray device. Take 1111.7g nickel cobalt manganese hydroxide precursor Ni 0.95 Co 0.03 Mn 0.02 (OH) 2 It is placed in a high-efficiency mixer with heating function for stirring, the heating temperature is 150 °C, and the stirring speed is 600 rpm. In the process of high-speed stirring of the precursor, use the spray equipment equipped with cobalt chloride aqueous solution for spraying, control the spray time to 30min, the spray flow rate to 4mL / min, the solution is completely sprayed, and the high-efficiency mixer with heating function after spraying Continue stirring for 120 min until Ni...
Embodiment 2
[0061] Example 2 Preparation of a modified high nickel ternary positive electrode material
[0062] (1) Preparation of nickel-cobalt-manganese hydroxide precursor coated with cobalt element on the surface:
[0063] Dissolve 34.92 g of cobalt nitrate in 120 mL of deionized water to prepare an aqueous cobalt nitrate solution, and place the aqueous cobalt nitrate solution in a spray device. Take 1111.7g nickel cobalt manganese hydroxide precursor Ni 0.95 Co 0.03 Mn 0.02 (OH) 2 It is placed in a high-efficiency mixer with heating function for stirring, the heating temperature is 150 °C, and the stirring speed is 600 rpm. In the process of high-speed stirring of the precursor, use a spray device equipped with a cobalt nitrate aqueous solution for spraying, control the spray time to 30min, the spray flow rate to 4mL / min, the solution is completely sprayed, and the high-efficiency mixer with heating function continues after spraying. Stir for 120 min until the precursor is fully...
Embodiment 3
[0068] Example 3 Preparation of a modified high nickel ternary positive electrode material
[0069] (1) Preparation of nickel-cobalt-manganese hydroxide precursor coated with cobalt element on the surface:
[0070] Dissolve 84.65 g of cobalt acetate tetrahydrate in 120 mL of deionized water to prepare a cobalt acetate aqueous solution, and place the cobalt acetate aqueous solution in a spray device. Take 1kg nickel cobalt manganese hydroxide precursor Ni 0.95 Co 0.03 Mn 0.02 (OH) 2 It is placed in a high-efficiency mixer with heating function for stirring, the heating temperature is 150 °C, and the stirring speed is 600 rpm. In the process of high-speed stirring of the precursor, use a spray device equipped with a cobalt acetate aqueous solution for spraying, control the spray time to 30min, the spray flow rate to 4mL / min, the solution is completely sprayed, and the high-efficiency mixer with heating function continues after spraying. Stir for 120 min until the precursor ...
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