Preparing method for spherical LiMn1-x-yNixCoyO2 anode material
A technology of nickel cobalt lithium manganate and positive electrode material, which is applied to battery electrodes, structural parts, electrical components, etc., can solve the problems of difficulty in obtaining impurity-free materials, reduction in comprehensive electrical properties, and difficulty in drying and dewatering. The effect of improving electrochemical cycle performance, improving quality, and reducing production steps
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Embodiment 1
[0028] A preparation method of a spherical nickel-cobalt lithium manganese oxide positive electrode material, comprising the following steps:
[0029] (1) Mixing of raw materials: Using a three-dimensional high-efficiency oblique mixer and polyurethane balls as the mixing medium, weigh lithium carbonate, nano-spherical nickel-cobalt-manganese hydroxide precursor and the mass ratio of the total mixture according to the molar ratio of 1:0.53 Disperse, mix and pulverize 10% polyvinyl alcohol to form a uniform intermediate mixture, in which the proportion of polyurethane balls is 1.3, the ratio of balls to materials is 3:4:3, and the mixing time is 3 hours;
[0030] (2) Primary sintering: put the intermediate mixture obtained in step (1) into a sagger, send it into a pusher kiln for sintering, and produce nickel-cobalt-lithium manganese oxide material. The sintering process is filled with oxygen continuously, and the sintering temperature is 650 ℃, the sintering time is 3h;
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Embodiment 2
[0035] (1) Mixing of raw materials: Using a three-dimensional high-efficiency inclined mixer and polyurethane balls as the mixing medium, weigh lithium carbonate, nano-spherical nickel-cobalt-manganese hydroxide precursors and the mass ratio of the total mixture according to the molar ratio of 1:0.535 Disperse, mix and pulverize 20% polyvinyl alcohol to form a uniform intermediate mixture, wherein the specific gravity of polyurethane balls is 1.5, the ball-to-material ratio is 3:4:3, and the mixing time is 3 hours;
[0036] (2) Primary sintering: put the intermediate mixture obtained in step (1) into a sagger, send it into a pusher kiln for sintering, and produce nickel-cobalt-lithium manganese oxide material. The sintering process is filled with oxygen continuously, and the sintering temperature is 700 ℃, the sintering time is 3h;
[0037] (3) Doping: choose nano Al 2 o 3 The nickel-cobalt lithium manganese oxide obtained in step (2) is doped, and is added to the nickel-cob...
Embodiment 3
[0041] (1) Mixing of raw materials: Using a three-dimensional high-efficiency oblique mixer and polyurethane balls as the mixing medium, weigh lithium carbonate, nano-spherical nickel-cobalt-manganese hydroxide precursors and 30% additives for dispersion at a molar ratio of 1:0.55 , mixing and crushing to form a uniform intermediate mixture, wherein the proportion of polyurethane balls is 1.4, the ball-to-material ratio is 3:4:3, and the mixing time is 4h;
[0042](2) Primary sintering: put the intermediate mixture obtained in step (1) into a sagger, and send it into a pusher kiln for sintering to produce nickel-cobalt-lithium manganate material. The sintering process is filled with oxygen continuously, and the sintering temperature is 750 ℃, the sintering time is 5h;
[0043] (3) Doping: choose nano TiO 2 The nickel-cobalt lithium manganese oxide obtained in step (2) is doped, and is added to the nickel-cobalt lithium manganese oxide obtained in step (2) at 0.2% of the total...
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