Mixed cathode material for lithium ion batteries and preparation method thereof
A lithium-ion battery and positive electrode technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of low consistency, cycle life, and limited safety improvement, and achieve the effect of long life
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[0049] Example 1
[0050] 1. Raw material A is selected as LiMn 1.9 Al 0.05 Co 0.05 O 3.98 F 0.02 , the average particle size is 10μm, and the specific surface area is 0.35m 2 / g, raw material B is LiNi 0.333 Co 0.329 Mn 0.333 Mg 0.004 O 2 , the average particle size is 10μm, the specific surface area is 0.30m 2 / g;
[0051] 2. Put 50wt% of raw material A and 50wt% of raw material B into a polyethylene container with a stirrer, add deionized water equivalent to 3 times the weight of the powder, start the stirrer, and stir at 500rpm for 20min.
[0052] 3. Liquid coating agents E and F were added dropwise to the polyethylene container filled with materials and dispersants through two peristaltic pumps, where E was a 0.2 mol / l concentration of lithium hydroxide aqueous solution, and F was a 0.2 mol / l concentration aqueous solution of aluminum nitrate. Control the dripping amount of the aluminum nitrate aqueous solution so that the aluminum element in the dripping ...
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[0054] Example 2
[0055] 1. Raw material A is selected as LiMn 1.9 Al 0.05 Mg 0.05 O 3.98 F 0.02 , the average particle size is 10μm, and the specific surface area is 0.35m 2 / g, raw material B is LiNi 0.333 Co 0.329 Mn 0.333 Ti 0.002 Mg 0.002 O 2 , the average particle size is 10μm, the specific surface area is 0.30m 2 / g;
[0056] 2. Put 50wt% of raw material A and 50wt% of raw material B into a polyethylene container with a stirrer, add deionized water equivalent to 3 times the weight of the powder, start the stirrer, and stir at 500rpm for 20min.
[0057] 3. Liquid coating agents E and F were added dropwise to the polyethylene container filled with materials and dispersants through two peristaltic pumps, wherein E was 0.2 mol / l concentration of ammonium phosphate aqueous solution, and F was 0.2 mol / l concentration of ammonium phosphate solution. Aqueous solution of aluminum nitrate. Control the dripping amount of the aluminum nitrate aqueous solution so t...
Example Embodiment
[0059] Example 3
[0060] 1. Raw material A is selected as LiMn 1.9 Al 0.05 Mg 0.05 O 3.98 F 0.02 , the average particle size is 10μm, and the specific surface area is 0.35m 2 / g, raw material B is LiNi 0.333 Co 0.329 Mn 0.333 Ti 0.002 Mg 0.002 O 2 , the average particle size is 10μm, the specific surface area is 0.30m 2 / g, raw material C-site LiNi 0.5 Co 0.196 Mn 0.3 Al 0.004 O 2 , the average particle size is 10μm, and the specific surface area is 0.35m 2 / g;
[0061] 2. Put 50wt% of raw material A, 30wt% of raw material B, and 20wt% of raw material C into a polyethylene container with a stirrer, add deionized water equivalent to 3 times the weight of the powder, start the stirrer, and stir at 500rpm for 20min .
[0062] 3. Liquid coating agents E and F were added dropwise to the polyethylene container filled with materials and dispersants through two peristaltic pumps, where E was a 0.2 mol / l concentration of lithium hydroxide aqueous solution, and F ...
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