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US 12,749,766 B2Granted
Separator including polyethylene with highly entangled polymer chains, and electrochemical device including the same
AssigneeLG Energy Solution, Ltd.
InventorsSu-Jin Park, Sang-Joon Lee
Life of this patent
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Abstract
Provided is a separator for an electrochemical device. The separator includes a separator substrate made of a porous polymer material, wherein the separator substrate has a small thickness, excellent resistance characteristics and ion conductivity, and high mechanical strength. When the separator is applied to a battery, it is possible to improve the output characteristics of the battery.
Claims13
A separator for an electrochemical device comprising:
- a porous substrate,
- wherein the porous substrate has a porosity of 40% to 70%,
- wherein the porous substrate comprises polyethylene,
- wherein the polyethylene has an entangle molecular weight of 2,500 g/mol or less,
- wherein the porous substrate has two peaks comprising a first peak at 130° C. to less than 145° C. and a second peak at 145° C. to 160° C. upon an initial scanning temperature-rising in a differential scanning calorimetry (DSC) curve, and
- wherein the second peak appears only upon the initial scanning in DSC analysis and is not identified upon a second or later scanning.
3 more elements
Dependencies are inferred from the claim text.