Abstract
A secondary battery with little deterioration is provided. A secondary battery with high safety is provided. A separator having excellent characteristics is provided. A separator achieving the secondary battery with high safety is provided. A novel separator is provided. In the separator, a polymer porous film and a layer including a ceramic-based material containing a metal oxide microparticle are stacked, the thickness of the layer including a ceramic-based material is greater than or equal to 1 μm and less than or equal to 100 μm, and the film thickness of the polymer porous film is greater than or equal to 4 μm and less than or equal to 50 μm.
Full Text
What is claimed is:
A secondary battery with little deterioration is provided. A secondary battery with high safety is provided. A separator having excellent characteristics is provided. A separator achieving the secondary battery with high safety is provided. A novel separator is provided. In the separator, a polymer porous film and a layer including a ceramic-based material containing a metal oxide microparticle are stacked, the thickness of the layer including a ceramic-based material is greater than or equal to 1 μm and less than or equal to 100 μm, and the film thickness of the polymer porous film is greater than or equal to 4 μm and less than or equal to 50 μm.
Timeline
Filed
06/12/2026Published
10/01/2026Granted
Not AvailableIPC Codes(5)
H01M 50/451:comprising layers of only organic material and layers containing inorganic material
H01M 10/0525:Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 50/403:Manufacturing processes of separators, membranes or diaphragms