Lithium source active material, positive pole piece, lithium ion capacitor and preparation method thereof
A technology of active materials and positive pole pieces, which is applied in the fields of lithium ion capacitors and its preparation, lithium source active materials, and positive pole pieces. Low requirements, strong operability, and improved stability
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Embodiment 1
[0031] (1) Production of positive pole piece:
[0032] Each material is by mass percentage ratio: Li 5 FeO 4 : graphene: activated carbon: conductive carbon black (SP): polyvinylidene fluoride (PVDF) = 12%: 10%: 72%: 3.5%: 2.5% uniformly mixed to form a stable slurry; the prepared positive electrode slurry Evenly coated on the front and back sides of the aluminum foil, leaving empty foil on both sides of the aluminum foil as the tab position for the tab welding, after rolling and die-cutting, the positive electrode sheet is made, and the positive electrode sheet is placed in a vacuum condition Save it for later use.
[0033] (2) Production of negative pole piece:
[0034]Each material is by mass percent: mesophase carbon microsphere (MCMB): conductive carbon black (SP): sodium carboxymethyl cellulose (CMC): styrene-butadiene latex (SBR)=90%: 6%: 2%: Mix 2% evenly to form a stable slurry; apply the prepared negative electrode slurry evenly on both sides of the copper foil, ...
Embodiment 2
[0038] Taking the laminated soft pack lithium-ion capacitor as an example, compared with Example 1, the difference is that the mass ratio of each material of the positive pole plate is different, and the mass percentage ratio of each material is Li 5 FeO 4 : graphene: activated carbon: conductive carbon black (SP): polyvinylidene fluoride (PVDF) = 12%: 7%: 75%: 3.5%: 2.5%, and the others are the same.
Embodiment 3
[0040] Taking the laminated soft pack lithium-ion capacitor as an example, compared with Example 1, the difference is that the mass ratio of each material of the positive pole plate is different, and the mass percentage ratio of each material is Li 5 FeO 4 : graphene: activated carbon: conductive carbon black (SP): polyvinylidene fluoride (PVDF) = 12%: 4%: 78%: 3.5%: 2.5%, and the others are the same.
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