Separator Having Excellent Heat Resistance and Electrolyte Wetting Properties
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United States of America Patent
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Jun 21, 2017
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Jun 23, 2016
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Abstract
A separator for a battery interposed between a cathode and an anode, and a method of manufacturing the same are provided, the separator for a lithium ion secondary battery including a porous polymer sheet having a first surface and a second surface opposing the first surface, and in which a pore communicating the first surface and the second surface is formed, and a heat resistant inorganic material layer coating at least the first surface and a surface of the pore, and formed in an atomic layer deposition method, wherein the heat resistant inorganic material layer formed on the first surface or the second surface has a thickness of 20 nm to 100 nm, porosity of the separator after the heat resistant inorganic material layer is formed is 30% to 70%, and a gurley value is 100 s/100 ml to 1000 s/100 ml.
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