US 2026/0302533 A1 · SEPARATOR, SECONDARY BATTERY, AND A METHOD FOR MANUFACTURING SEPARATOR

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.

Claims2

Dependent claims

A method for manufacturing a separator, comprising:

a first step of mixing a ceramic-based material comprising a metal oxide microparticle and a first solvent to form a first mixture;
a second step of mixing the first mixture, a first binder, and a second solvent to form a second mixture;
a third step of mixing the second mixture, a second binder, and a third solvent to form a third mixture;
a fourth step of applying the third mixture onto a polymer porous film;
and
a fifth step of heating the polymer porous film coated with the third mixture at higher than or equal to 60° C. and lower than or equal to 300° C. to be dried.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

19/705,898Filed 12 Jun 2026

Priority

JP 2020-17916826 Oct 2020

Published

1 Oct 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01M 50/451
Having a layered structure: comprising layers of only organic material and layers containing inorganic material
H01M 10/0525
Li-accumulators: rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 50/403
Separators; Membranes; Diaphragms; Spacing elements inside cells: manufacturing processes of separators, membranes or diaphragms
H01M 50/434
Inorganic material: ceramics

Separator, secondary battery, and a method for manufacturing separator

Life of this patent

Separator, secondary battery, and a method for manufacturing separator

Life of this patent

Abstract

Claims2