SEPARATOR FOR ELECTROCHEMICAL DEVICE
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United States of America Patent
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Issued Date -
Jul 14, 2016
app pub date -
Nov 6, 2014
filing date -
Nov 6, 2013
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Abstract
The present disclosure provides a separator for an electrochemical device, comprising: a porous polymer film; and a porous coating layer formed on one or both surfaces of the porous polymer film and comprising at least one of inorganic particles and organic particles, and a binder polymer, wherein fibrils in the surface of the porous polymer film are entangled with the particles in the porous coating layer in the contact surface between the porous polymer film and the porous coating layer, and the separator has an air permeability of 100 to 800 sec/100 cc, an electrical resistance of 0.5 to 1.5Ω, and a heat-shrinkage rate of 8% or less in each of machine and transverse directions, and an electrochemical device having the same.
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