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US 2018/0294458 A1Published application
Highly heat resistant and flame retardant separator, and electrochemical cell
AssigneeSamsung SDI Co., Ltd.
InventorsChang Hong KO, Dong Wan SEO, Mok Yun JIN
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Abstract
The present invention relates to: a separator comprising a porous substrate, and a heat resistant porous layer on one or both surfaces of the porous substrate, wherein the heat resistant porous layer comprises a cross-linked product of a cross-linkable functional group-containing phosphate-based or phosphonate-based monomer, oligomer, or polymer; an electrochemical cell comprising the same; or a method for preparing the separator.
Claims20
A separator comprising
- a porous substrate and
- a heat resistant porous layer on one or both surfaces of the porous substrate, wherein the heat resistant porous layer comprises a cross-linked product of a cross-linkable functional group-containing phosphate-based or phosphonate-based monomer, oligomer, or polymer.
A separator comprising
- a porous substrate;
- and
- a heat resistant porous layer formed on one or both surfaces of the porous substrate,
- wherein an electrolyte solution shrinkages of the separator at a width direction and a length direction at 150° C. and 60 minutes are each less than or equal to 45%, and
- a flame retardancy is greater than or equal to V2 according to UL94 VB flame-retardance regulations.
2 more elements
A method of preparing a separator, comprising
- preparing a heat resistant porous layer composition comprising a cross-linkable functional group-containing phosphate-based or phosphonate-based monomer, oligomer, or polymer, a polymerization initiator, and a solvent, and
- coating the heat resistant porous layer composition on one or both surfaces of the porous substrate and performing a cross-linking reaction to form a heat resistant porous layer.
Dependencies are inferred from the claim text.