Modified positive electrode material and preparation method thereof
A positive electrode material and modification technology, applied in the direction of positive electrode, active material electrode, battery electrode, etc., can solve the problems of poor rate performance and poor cycle performance, so as to avoid direct contact, increase transmission rate, improve cycle performance and rate performance effect
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[0037] Example 1
[0038] This embodiment provides a modified cathode material, which is prepared by the following method:
[0039] S1: Add the nickel-cobalt lithium aluminate cathode material to the container containing the copper sulfate solution, use a double planetary mixer with a revolution linear speed of 2m / s and a rotation linear speed of 10m / s, and the stirring time is 300min to make the material fully slurry. Use a peristaltic pump to input the slurry into the spray dryer for spray drying (inlet temperature is 300°C, outlet temperature is 110°C), and the dried powder is placed in a muffle furnace at a temperature of 5°C / min The speed is raised to 500°C, the temperature is kept for 5 hours in an oxygen atmosphere, and then it is cooled to room temperature with the furnace, and the NCA@CuO cathode material is obtained after grinding, crushing and sieving;
[0040] S2: Dissolve glucose evenly in deionized water at a temperature of 40°C, prepare a solution with a concentration...
Example Embodiment
[0043] Example 2
[0044] This embodiment provides a modified cathode material, which is prepared by the following method:
[0045] S1: Add the positive electrode material of nickel cobalt lithium aluminate to the container containing the copper nitrate solution, use a double planetary mixer with revolution linear velocity 4m / s and rotation linear velocity 20m / s, stirring time is 100min, so that the material is fully slurried. Use a peristaltic pump to input the slurry into the spray dryer for spray drying (inlet temperature is 350°C, outlet temperature is 120°C), and the dried powder is placed in a muffle furnace at a temperature of 3°C / min The speed is raised to 550°C, the temperature is kept for 6 hours in an oxygen atmosphere, and then cooled to room temperature in the furnace, after grinding, crushing, and sieving, the NCA@CuO cathode material is obtained;
[0046] S2: Dissolve sucrose evenly in deionized water at a temperature of 50°C, prepare a solution with a concentration o...
Example Embodiment
[0048] Example 3
[0049] This embodiment provides a modified cathode material, which is prepared by the following method:
[0050] S1: Add the nickel-cobalt lithium aluminate cathode material to the container with the copper chloride solution, use a double planetary mixer at a revolution linear velocity of 4m / s and a rotation linear velocity of 25m / s, and the stirring time is 60min to make the material fully slurry. , Use a peristaltic pump to input the slurry into the spray dryer for spray drying (inlet temperature is 400°C, outlet temperature is 80°C), and the dried powder is placed in a muffle furnace at 10°C / min The temperature rise rate is raised to 400℃, kept in an oxygen atmosphere for 3 hours, and then cooled to room temperature in the furnace, after grinding, crushing, and sieving, the NCA@CuO cathode material is obtained;
[0051] S2: Dissolve glucose uniformly in deionized water at a temperature of 60℃, prepare a solution with a concentration of 0.2mol / L, and then put it...
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