{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "Provided is a separator for a rechargeable battery, including a porous substrate and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes a binder including a fluorine-based binder and a (meth)acryl-based binder, and a filler, the fluorine-based binder…",
  "path": "/patents/1424151",
  "publishedAt": "2026-05-13T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B01D69/1212",
    "SAMSUNG SDI CO LTD [KR]"
  ],
  "textContent": "Provided is a separator for a rechargeable battery, including a porous substrate and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes a binder including a fluorine-based binder and a (meth)acryl-based binder, and a filler, the fluorine-based binder includes a first structural unit derived from vinylidene fluoride and a second structural unit derived from at least one monomer of hexafluoropropylene, chlorotrifluoroethylene, trifluoroethylene, ethylene tetrafluoride, and ethylene monomers, and 10 wt% or less of the second structural unit is included based on the fluorine-based binder, the fluorine-based binder includes a first fluorine-based binder having a weight average molecular weight of 800,000 to 1,500,000 and a second fluorine-based binder having a weight average molecular weight of less than or equal to 600,000, and the (meth)acryl-based binder has pencil hardness of 5H or higher.",
  "title": "SEPARATOR FOR RECHARGEABLE BATTERY AND LITHIUM RECHARGEABLE BATTERY COMPRISING SAME"
}