The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 08, 2020
Filed:
Dec. 06, 2018
Contemporary Amperex Technology Co., Limited, Ningde, CN;
Huafeng Huang, Ningde, CN;
Qisen Huang, Ningde, CN;
Shiwen Wang, Ningde, CN;
Chengdu Liang, Ningde, CN;
Abstract
The present disclosure relates to a composite separator, a preparation method of the composite separator, and an electrochemical device containing the composite separator. The composite separator includes a substrate and an inorganic layer disposed on at least one surface of the substrate. The substrate is a porous substrate, and the inorganic layer is an inorganic dielectric layer which is a continuous dense film layer with porosity lower than 10% and contains no binder. A thickness of the inorganic layer is 20 nm-1000 nm. An interfacial peeling force between the inorganic layer and the substrate is no less than 30 N/m. The separator of the present application has high wettability with respect to electrolyte, almost no thermal shrinkage, relatively high mechanical strength, and favorable corrosion resistance and durability performances, and thus, a battery using the separator has relatively high thermal stability and nailing strength.