A kind of different particle size narrow distribution ternary precursor and its preparation method
A precursor and narrow distribution technology, applied in the direction of electrical components, structural parts, battery electrodes, etc., can solve the problems of low tap density, uneven particle size, high production cost, etc., achieve narrow particle size distribution, ensure uniformity, and disperse good sex effect
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Embodiment 1
[0036] A preparation method of a ternary precursor with narrow distribution of different particle sizes:
[0037] (1) Ni, Co and Mn are prepared in a molar ratio of 1:1:1 to prepare a mixed aqueous solution of nickel-cobalt-manganese soluble salts with a total concentration of 2.0mol / L, and to prepare an aqueous sodium hydroxide solution with a concentration of 8mol / L. The preparation concentration is the ammonia solution of 10mol / L;
[0038] (2) Adding ammonia concentration in the first reactor with temperature control water bath jacket, stirring paddle and precision filter tube is 0.15mol / L, pH is the first mother liquor of 11.78, and the first mother liquor is used as bottom water, Make the first mother liquor not pass through all the stirring paddles of the first reactor, the addition of the first mother liquor accounts for 1 / 3 of the total volume of the first reactor, the volume of the first reactor is 6500L, adding the bottom water earlier can make the first reactor Bef...
Embodiment 2
[0058] A preparation method of a ternary precursor with narrow distribution of different particle sizes:
[0059] (1) Ni, Co and Mn are prepared in a molar ratio of 1:1:1 to prepare a mixed aqueous solution of nickel-cobalt-manganese soluble salts with a total concentration of 2.5mol / L, and to prepare an aqueous sodium hydroxide solution with a concentration of 10mol / L. The preparation concentration is the ammonia solution of 10mol / L;
[0060] (2) in the first reactor that has temperature control water bath jacket, stirring paddle and precision filter tube, adding ammonia concentration is 0.25mol / L, and pH is the first mother liquor of 11.55, and the first mother liquor is used as bottom water, Make the first mother liquor not pass through all the stirring paddles of the reactor, the addition of the first mother liquor accounts for 2 / 3 of the total volume of the first reactor, and the volume of the first reactor is 6500L;
[0061](3) Feed nitrogen into the sealed first reacti...
Embodiment 3
[0078] A preparation method of a ternary precursor with narrow distribution of different particle sizes:
[0079] (1) Ni, Co and Mn are prepared in a molar ratio of 1:1:1 to prepare a mixed aqueous solution of nickel-cobalt-manganese soluble salts with a total concentration of 2.3mol / L, and to prepare an aqueous sodium hydroxide solution with a concentration of 10mol / L. The preparation concentration is the ammonia solution of 8mol / L;
[0080] (2) Adding ammonia concentration in the first reactor with temperature control water bath jacket, stirring paddle and precision filter tube is 0.2mol / L, pH is the first mother liquor of 11.5, and the first mother liquor is used as bottom water, Make the first mother liquor not pass through all the stirring paddles of the reactor, the addition of the first mother liquor accounts for 1 / 2 of the total volume of the first reactor, and the volume of the first reactor is 6500L;
[0081] (3) Feed nitrogen into the sealed first reaction kettle, ...
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