Separator For Electrochemical Device And Electrochemical Device Comprising Same

Abstract: [Abstract] The present invention relates to a separator for an electrochemical device and an electrochemical device comprising same, the separator comprising: a porous polymer substrate; and an organic/inorganic composite porous coating layer formed on at least one surface of the polymer substrate, wherein the porous coating layer includes particulate binder resins and inorganic particles, and [binder particle content at the top of the porous coating layer before electrolyte impregnation/ binder particle content at the center of the porous coating layer before electrolyte impregnation] - [binder particle content at the top of the porous coating layer after electrolyte impregnation/ binder particle content at the center of the porous coating layer after electrolyte impregnation] is 0.32 or less.

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