{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
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    "size": 114615
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  "description": "This separator is for electrochemical elements, is to be interposed between a pair of electrodes, and includes para-aramid fibers for holding an electrolytic solution. The separator for electrochemical elements is characterized in that the contained amount of fibers having a fiber diameter of…",
  "path": "/patents/1404344",
  "publishedAt": "2025-02-12T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "D04H1/4342",
    "NIPPON KODOSHI CORP [JP]"
  ],
  "textContent": "This separator is for electrochemical elements, is to be interposed between a pair of electrodes, and includes para-aramid fibers for holding an electrolytic solution. The separator for electrochemical elements is characterized in that the contained amount of fibers having a fiber diameter of 0.03-0.50 µm is 90 mass% or more, the proportion of the number of fibers having a fiber length not less than 0.05 mm but less than 0.20 mm is 20-30%, and the proportion of the number of fibers having a fiber length not less than 0.20 mm but less than 5.00 mm is 70-80%.",
  "title": "SEPARATOR FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY"
}