Lithium ion battery
A lithium-ion battery and conductive agent technology, applied in battery electrodes, secondary batteries, secondary battery charging/discharging, etc., can solve problems such as thermal failure of lithium-ion batteries, achieve thermal failure, reduce heat release, and improve safety performance effect
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Embodiment 1
[0029] (1) Preparation of the positive pole piece: the positive active material lithium nickel cobalt manganese LiNi 1 / 3 co 1 / 3 mn 1 / 3 , the positive electrode additive lithium carbonate, the conductive agent Super P, and the binder polyvinylidene fluoride (PVDF) are mixed with the solvent N-methylpyrrolidone (NMP) at a mass ratio of 95.06:1.94:1.4:1.6 to make a positive electrode slurry. After that, evenly coat the positive electrode slurry on the current collector aluminum foil and dry it at 85°C, then cold press it, then trim, cut into pieces, and divide into strips, then dry it under vacuum at 85°C for 4 hours, and then weld The tabs are used to complete the preparation of the positive pole piece.
[0030] (2) Preparation of negative pole piece: Negative active material graphite, conductive agent Super P, thickener CMC and binder SBR are mixed with solvent deionized water at a mass ratio of 97:1:1:1 to make negative electrode slurry After that, evenly coat the negative ...
Embodiment 2
[0034] A lithium ion battery was prepared with reference to the method of Example 1, except that the mass ratio of lithium nickel cobalt manganese, lithium carbonate, Super P and PVDF in the positive electrode slurry was 96.03:0.97:1.4:1.6.
Embodiment 3
[0036] A lithium ion battery was prepared with reference to the method of Example 1, except that the mass ratio of lithium nickel cobalt manganese, lithium carbonate, Super P and PVDF in the positive electrode slurry was 94.09:2.91:1.4:1.6.
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