Manufacturing method for safe lithium ion power battery positive plate
A power battery and manufacturing method technology, applied to battery electrodes, circuits, electrical components, etc., can solve problems such as increasing the cost of material manufacturing technology and raw material manufacturing costs, changing the inherent advantages of lithium-ion batteries, and having no feasibility or applicable value. Achieve the effects of reducing the possibility of oxidation-reduction reactions, good high-rate charge-discharge performance, and excellent electrochemical cycle performance
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[0054] Example 1:
[0055] A method for manufacturing the positive pole piece of a safe lithium ion power battery, the steps are:
[0056] In the first step, the Al-coated double sphere-shaped positive electrode active material and the SPS conductive agent with a mass ratio of 100:0.1 (that is, the mass ratio of Super-P to SWCNT, the same below, omitted), are respectively 75% and 20% by mass. % Ratio by ball milling for 4 hours to mix evenly to make positive electrode powder and positive electrode powder mixture A;
[0057] In the second step, 5% by mass PVdF of the positive electrode active material positive electrode powder mixture A obtained in the first step is added to the NMP solvent, and stirred for 120 minutes at a temperature of 80°C, and then stirred to form the compound B;
[0058] The third step is to add the positive electrode powder mixture A obtained in the first step to the compound B in 3 to 5 times, control the solid content of the positive electrode powder mixture A...
Example Embodiment
[0061] Example 2:
[0062] A method for manufacturing the positive pole piece of a safe lithium ion power battery, the steps are:
[0063] In the first step, the Al-coated hamburger-shaped positive electrode active material and the SPS conductive agent with a mass ratio of 100:0.3 are ball milled and mixed uniformly at the mass percentages of 80% and 16% respectively for 6 hours to form a positive electrode powder and positive electrode powder mixture. A;
[0064] In the second step, PVdF with 4% mass percentage of the positive electrode active material positive electrode powder mixture A obtained in the first step was added to the NMP solvent, and stirred for 100 minutes at a temperature of 80°C, and then stirred to form the compound B;
[0065] The third step is to add the positive electrode powder mixture A obtained in the first step to the compound B in 3 to 5 times, control the solid content of the positive electrode powder mixture A to the mass ratio of NMP between 1350:800, and...
Example Embodiment
[0068] Example 3:
[0069] A method for manufacturing the positive pole piece of a safe lithium ion power battery, the steps are:
[0070] In the first step, the Si-coated olive / ellipsoid-shaped positive electrode active material and the SPS conductive agent with a mass ratio of 100:0.5, etc., are ball milled and mixed uniformly at the mass percentages of 85% and 12% for 8 hours to make the positive electrode powder. Material positive electrode powder mixture A;
[0071] In the second step, PVdF, which accounts for 3% by mass of the positive electrode active material and positive electrode powder mixture A obtained in the first step, is added to the NMP solvent, and stirred for 120 minutes at a temperature of 80° C., and stirred to form a compound B;
[0072] The third step is to add the positive electrode powder mixture A obtained in the first step to the compound B in 3 to 5 times, control the solid content of the positive electrode powder mixture A to the mass ratio of NMP between ...
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