Positive pole piece, manufacturing method thereof and secondary battery
A technology for positive pole pieces and manufacturing methods, which is applied to battery electrodes, electrode manufacturing, electrode collector coatings, etc., can solve problems affecting the performance of positive pole pieces, and achieve improved performance, reduced corrosion, and reduced contact area Effect
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[0089] Example 1:
[0090] 1wt% Li 2 NiO 2 , And 97.5wt% lithium nickel cobalt manganese oxide LiNi 0.8 Mn 0.1 Co 0.1 O 2 The particles, 0.5 wt% sp and 1 wt% pvdf are added to the solvent and stirred to obtain a mixed slurry, forming a uniform and stable first slurry. The 97wt% lithium nickel cobalt manganese oxide LiMn 0.8 Ni 0.1 Co 0.1 O 2 The particles, 2wt% sp and 1wt% pvdf are added to the solvent and stirred to obtain a mixed slurry, forming a uniform and stable second slurry. The first slurry and the second slurry are simultaneously layered and coated on the surface of the aluminum foil, so that the first slurry is coated on the bottom layer directly in contact with the current collector, and the second slurry is on the surface layer away from the current collector. The coating width of the first slurry and the second slurry is 60 mm, and the coating thickness ratio is 30%:70%. Afterwards, the pole piece was dried and rolled at a drying temperature of 110, a rolling press...
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[0091] Example 2
[0092] 30wt% Li 2 NiO 2 , And 66.2wt% lithium nickel cobalt manganese oxide LiNi 0.8 Mn 0.1 Co 0.1 O 2 The particles, 2wt% sp and 1.8wt% pvdf are added to the solvent and stirred to obtain a mixed slurry, forming a uniform and stable first slurry. The 97wt% lithium nickel cobalt manganese oxide LiMn 0.8 Ni 0.1 Co 0.1 O 2 The particles, 2wt% sp and 1wt% pvdf are added to the solvent and stirred to obtain a mixed slurry, forming a uniform and stable second slurry. The first slurry and the second slurry are simultaneously layered and coated on the surface of the aluminum foil, so that the first slurry is coated on the bottom layer directly in contact with the current collector, and the second slurry is on the surface layer away from the current collector. The coating width of the first slurry and the second slurry is 60 mm, and the coating thickness ratio is 30%:70%. Afterwards, the pole piece was dried and rolled at a drying temperature of 110, a rolling pressur...
Example Embodiment
[0093] Example 3
[0094] 50wt% Li 2 NiO 2 , And 76.2wt% lithium nickel cobalt manganese oxide LiNi 0.8 Mn 0.1 Co 0.1 O 2 The particles, 2wt% sp and 1.8wt% pvdf are added to the solvent and stirred to obtain a mixed slurry, forming a uniform and stable first slurry. The 97wt% lithium nickel cobalt manganese oxide LiMn 0.8 Ni 0.1 Co 0.1 O 2 The particles, 2wt% of sp, and 1wt% of PVDF are added to the solvent and stirred to obtain a mixed slurry to form a uniform and stable second slurry. The first slurry and the second slurry are simultaneously layered and coated on the surface of the aluminum foil, so that the first slurry is coated on the bottom layer directly in contact with the current collector, and the second slurry is on the surface layer away from the current collector. The coating width of the first slurry and the second slurry is 60mm, and the coating thickness ratio of the first slurry and the second slurry is 30%:70%, and then the pole pieces are dried, rolled, and dri...
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