Method of manufacturing separator for electrochemical device and separator for electrochemical device manufactured thereby
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United States of America Patent
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Aug 21, 2018
Grant Date -
May 19, 2016
app pub date -
Oct 31, 2014
filing date -
Oct 31, 2013
priority date (Note) -
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Abstract
A method of manufacturing a separator for an electrochemical device according to an exemplary embodiment of the present disclosure includes extruding a resin composition including polyolefin and a diluent, stretching the extruded resin composition to obtain a polyolefin film, extracting the diluent from the obtained polyolefin film to obtain a porous polyolefin film, coating a slurry for forming a porous coating layer on at least one surface of the porous polyolefin film, and heat setting the porous polyolefin film coated with the slurry to obtain a composite separator with a porous coating layer.
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