{
  "$type": "site.standard.document",
  "description": "Disclosed is a porous membrane for a secondary battery, which has further improved output characteristics and long-term cycle characteristics when compared with conventional porous membranes. The porous membrane for a secondary battery is used for a lithium ion secondary battery or the like…",
  "path": "/patents/999556",
  "publishedAt": "2012-08-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/0525",
    "ZEON CORP [JP]"
  ],
  "textContent": "Disclosed is a porous membrane for a secondary battery, which has further improved output characteristics and long-term cycle characteristics when compared with conventional porous membranes. The porous membrane for a secondary battery is used for a lithium ion secondary battery or the like. Specifically disclosed is a porous membrane for a secondary battery, which contains polymer particles A that have a number average particle diameter of 0.4 µm or more but less than 10 µm and a glass transition temperature of 65°C or more and polymer particles B that have a number average particle diameter of 0.04 µm or more but less than 0.3 µm and a glass transition temperature of 15°C or less. It is preferable that the polymer particles B have a crystallization degree of 40% or less and a main chain structure that is composed of a saturated structure.",
  "title": "POROUS MEMBRANE FOR SECONDARY BATTERY, AND SECONDARY BATTERY"
}