Positive electrode plate, and electrochemical apparatus and electronic apparatus including such positive electrode plate
US12388074B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2022 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Jan 3, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M2220/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.