Preparation method of nickel-cobalt lithium manganate anode material through hydro-thermal synthesis
A technology of nickel-cobalt lithium manganese oxide and positive electrode materials, which is applied in the direction of battery electrodes, electrical components, circuits, etc., can solve the problems of affecting the service life of lithium batteries, residual alkaline compounds, and partial mixing of lithium source waste, so as to avoid waste Effects of local uneven mixing, reduction of basic compounds, and shortening of sintering time
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[0026] Example 1
[0027] S1, nickel sulfate 11.62Kg, cobalt sulfate 4.48Kg, and manganese sulfate 2.38Kg are prepared into a 2mol / L sulfate solution according to the molar ratio of Ni:Mn:Co 6:2:2. Dissolve 0.063Kg of aluminum nitrate and add the above salt. The solution is composed of mixed salt solution A; then mixed alkali solution B with the concentration of sodium hydroxide and ammonia water of 3.0 mol / L and 0.45 mol / L is prepared;
[0028] S2, the prepared mixed salt solution A and mixed alkali solution B are pumped into the reactor at the same time, and the flow of lye B is controlled so that the pH of the mixed reaction solution in the reactor is 10.8±0.2, and the stirring speed of the mixed solution in the reactor is 200 Rpm, the reaction temperature is 65°C, after the co-precipitation reaction is completed, the obtained precipitate is washed, filtered, and dried to obtain the doped nickel, cobalt, and manganese ternary precursor;
[0029] S3, the nickel-cobalt-manganese pr...
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[0031] Example 2
[0032] S1: Prepare 11.62Kg of nickel sulfate, 4.48Kg of cobalt sulfate, and 2.38Kg of manganese sulfate at a molar ratio of Ni:Mn:Co of 6:2:2 into a 2mol / L sulfate solution, and dissolve 0.063Kg of aluminum nitrate and add it to the above The salt solution is composed of a mixed salt solution A; then a mixed alkali solution B with the concentration of sodium hydroxide and ammonia water of 3.0mol / L and 0.45mol / L is prepared;
[0033] S2, the prepared mixed salt solution A and mixed alkali solution B are pumped into the reactor at the same time, and the flow of lye B is controlled so that the pH of the mixed reaction solution in the reactor is 11.2±0.2, and the stirring speed of the mixed solution in the reactor is 400 Rpm, the reaction temperature is 50°C, after the co-precipitation reaction is completed, the obtained precipitate is washed, filtered, and dried to obtain a doped nickel, cobalt, and manganese ternary precursor;
[0034] S3, the nickel-cobalt-manganes...
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[0036] Example 3
[0037] S1, nickel sulfate 11.62Kg, cobalt sulfate 4.48Kg, and manganese sulfate 2.38Kg are prepared into a 2mol / L sulfate solution according to the molar ratio of Ni:Mn:Co 6:2:2. Dissolve 0.063Kg of aluminum nitrate and add the above salt. The solution is composed of mixed salt solution A; then mixed alkali solution B with the concentration of sodium hydroxide and ammonia water of 3.0 mol / L and 0.45 mol / L is prepared;
[0038] S2, the prepared mixed salt solution A and mixed alkali solution B are pumped into the reactor at the same time, and the flow of lye B is controlled so that the pH of the mixed reaction solution in the reactor is 11.2±0.2, and the stirring speed of the mixed solution in the reactor is 400 Rpm, the reaction temperature is 55°C, after the co-precipitation reaction is completed, the obtained precipitate is washed, filtered, and dried to obtain a doped nickel-cobalt-manganese ternary precursor;
[0039] S3, the nickel-cobalt-manganese precursor ...
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