Preparation method of 5V high-voltage anode material for lithium battery
A positive electrode material and lithium battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor safety performance and inconvenient maintenance, and achieve the effect of improving structural stability and cycle performance
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Embodiment 1
[0023] According to the molar ratio of Mn:Ni=0.65:0.35, NiSO 4 ·6H 2 O, MnSO 4 ·H 2 O was prepared into a mixed solution, and slowly dropped into 2.0mol / L sodium hydroxide solution at a stirring speed of 50r / min, and the pH value of the system was adjusted with ammonia water to control it at 6.5, and the reaction temperature was set at 50℃ Until the end of the reaction, a black precipitate was formed. The precipitate was filtered by suction, washed with water 3 times, and dried in an oven at 110°C to obtain a precursor. Weigh 403g of the precursor and 597g of lithium carbonate and mix them with ball milling and mixing for 0.5h, and then precision mixing for 1h with a high-speed mixing granulator. The mixed materials are granulated with binder PVA, and then placed in a drying box for drying at 200°C. The dried mixture particles were calcined under a nitrogen atmosphere at 1000° C. for 16 hours, and cooled after being crushed and classified to obtain the final cathode material. ...
Embodiment 2
[0026] According to the molar ratio of Mn:Ni=0.65:0.35, NiSO 4 ·6H 2 O, MnSO 4 ·H 2 O was prepared into a mixed solution, slowly dripped into 1.0mol / L sodium hydroxide solution under stirring at 60r / min, the pH value of the system was adjusted with ammonia water to control it at 7.0, and the reaction temperature was set at 60℃ until the reaction The formation of black precipitate ended. The precipitate was filtered by suction, washed with water 3 times, and dried in an oven at 110°C to obtain a precursor. Weigh 810 g of the precursor and 1194 g of lithium carbonate and mix them with ball milling and mixing for 1 hour, and then precision mixing for 1.5 hours with a high-speed mixing granulator. The mixed materials are granulated with binder PVA, and then placed in a drying box for drying at 200°C. The dried mixture particles are calcined in a nitrogen atmosphere at a temperature of 1100° C. for 12 hours, and annealed, crushed and classified to obtain the final cathode material....
Embodiment 3
[0028] According to the molar ratio of Mn:Ni=0.65:0.35, Ni(NO 3 ) 2 ·6H 2 O, MnCl 2 ·4H 2 O was prepared into a mixed solution, slowly dripped into 3.0mol / L sodium hydroxide solution under stirring at 70r / min, the pH value of the system was adjusted with ammonia water to control it at 8.0, and the reaction temperature was set at 70℃ until the reaction The formation of black precipitate ended. The precipitate was filtered by suction, washed with water 3 times, and dried in an oven at 110°C to obtain a precursor. Weigh 1620 g of the precursor and 2388 g of lithium carbonate and mix them with ball milling for 2 hours, and then precision mixing with a high-speed mixing granulator for 2 hours. The mixed materials are granulated with binder PVA, and then placed in a drying box for drying at 200°C. The dried mixture particles were calcined in a nitrogen atmosphere at 750° C. for 22 hours, and annealed, crushed and classified to obtain the final cathode material.
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