{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "The present disclosure relates to a separator for a lithium secondary battery, including: a porous polymer substrate; and a porous coating layer disposed on at least one surface of the porous polymer substrate, and including first inorganic particles surface-treated with a polyphenol-based…",
  "path": "/patents/1400506",
  "publishedAt": "2026-02-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/052",
    "LG ENERGY SOLUTION LTD [KR]"
  ],
  "textContent": "The present disclosure relates to a separator for a lithium secondary battery, including: a porous polymer substrate; and a porous coating layer disposed on at least one surface of the porous polymer substrate, and including first inorganic particles surface-treated with a polyphenol-based compound, second inorganic particles surface-treated with an organic acid and a binder polymer, wherein the first inorganic particles have an average particle diameter of 100-700 nm, and the second inorganic particles have an average particle diameter of 30-80 nm, and a lithium secondary battery including the same. The separator for a lithium secondary battery uses two types of surface-treated inorganic particles having a different average particle diameter. Therefore, the inorganic particles have improved dispersibility, and the separator has high thermal safety and can prevent separation of the inorganic particles.",
  "title": "SEPARATOR FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME"
}