A kind of preparation method of amorphous nickel-cobalt-manganese ternary precursor
A technology of nickel-cobalt-manganese and precursors, which is applied in the direction of electrical components, structural parts, battery electrodes, etc., can solve the problems of difficult handling of reaction liquid, large size, low reactivity, etc., to achieve sustainable development and improve utilization rate Effect
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[0028] Aiming at the problems existing in the prior art, the present invention provides a method for preparing a nickel-cobalt-manganese ternary precursor, comprising: (1) inputting nickel-cobalt-manganese ternary sulfate solution and sodium hydroxide solution into the reactor, Stirring and reacting, separating solid and liquid to obtain nickel-cobalt-manganese hydroxide; and (2) washing the nickel-cobalt-manganese hydroxide and drying to obtain a nickel-cobalt-manganese ternary precursor.
[0029] The nickel-cobalt-manganese ternary precursor of the present invention is Ni x co y mn (1-x-y) (OH) 2 , wherein, 0.65>x>0.33, 0.33>y>0.
[0030] Preferably, the nickel-cobalt-manganese ternary sulfate solution used in the preparation method of the present invention is obtained by recycling waste lithium ion batteries. Specifically, the preparation method of the nickel-cobalt-manganese ternary sulfate solution is as follows:
[0031] 1) Weigh a certain quality of waste lithium ba...
Embodiment 1
[0054] Example 1: Ni 0.5 co 0.2 mn 0.3 (OH) 2 preparation of
[0055] (1) Reverse co-precipitation: the concentration of nickel-cobalt-manganese sulfate solution recovered from waste lithium-ion batteries is 150g / L, the molar ratio of nickel-cobalt-manganese is 5:2:3, and the NaOH solution is 200g / L. Before the reaction starts, feed nitrogen into the nickel-cobalt-manganese ternary liquid storage tank, the lye liquid storage tank and the reactor simultaneously; 3 / h and lye at 0.9m 3 / h into the reactor at a uniform speed, the stirring speed in the reactor is controlled at 2000r / min, the temperature is at room temperature, and the pH of the synthetic filtrate is controlled to be 9.0-9.7. When the liquid level in the reactor reaches the outlet, the slurry in the reactor overflows to the reaction In the kettle, the stirring speed in the reactor is controlled at 60r / min; after the reaction, the synthetic liquid is stirred in the reactor for 1 hour, and then the solid and liq...
Embodiment 2
[0060] Example 2: Ni 0.6s co 0.05 mn 0.3 (OH) 2 preparation of
[0061] (1) Reverse co-precipitation: the concentration of nickel-cobalt-manganese sulfate solution recovered from waste lithium-ion batteries is 150g / L, the molar ratio of nickel-cobalt-manganese is 6.5:0.5:3, and the NaOH solution is 100g / L. Before the reaction starts, feed nitrogen into the nickel-cobalt-manganese ternary liquid storage tank, the lye liquid storage tank and the reactor simultaneously; 3 / h and lye at 0.9m 3 / h into the reactor at a constant speed, the stirring speed in the reactor is controlled at 2200r / min, the temperature is at room temperature, and the pH of the synthetic filtrate is controlled to be 9.0-9.7. When the liquid level in the reactor reaches the outlet, the slurry in the reactor overflows to the reaction In the kettle, the stirring speed in the reactor is controlled at 60r / min; after the reaction, the synthetic liquid is stirred in the reactor for 1 hour, and then the solid ...
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