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公开(公告)号：US20220223836A1
公开(公告)日：2022-07-14
申请号：US17709528
申请日：2022-03-31
Applicant: Ningde Amperex Technology Limited
Abstract: A positive electrode plate includes a composite current collector, a functional coating, and a positive electrode active material layer, where the functional coating is disposed on at least one surface of the composite current collector, and is located between the composite current collector and the positive electrode active material layer; and the functional coating comprises a positive electrode active material, and a D50 particle size of the positive electrode active material is less than or equal to 5 μm. This can reduce the stress applied to the composite current collector during a cold pressing process without losing energy density. In addition, this also can mitigate misalignment of a metal layer and a polymer film due to inconsistent stretching extents, and alleviate problems such as cracking of the metal layer of the composite current collector and the metal layer tending to fall off from the polymer film.
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