{
  "$type": "site.standard.document",
  "description": "A nonaqueous electrolyte energy storage device according to one aspect of the present invention includes an electrode assembly including a positive electrode containing positive active material particles, and a negative electrode, in which a void index A represented by the following Formula (1) in…",
  "path": "/patents/1390280",
  "publishedAt": "2026-06-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/052",
    "GS YUASA INT LTD [JP]"
  ],
  "textContent": "A nonaqueous electrolyte energy storage device according to one aspect of the present invention includes an electrode assembly including a positive electrode containing positive active material particles, and a negative electrode, in which a void index A represented by the following Formula (1) in the positive active material particles is 5 or more, a boron element is present on at least a part of a surface of the positive active material particles, and at least a part of the electrode assembly is in a pressed state: A=S1/S2 in Formula (1), S1 is a BET specific surface area of the positive active material particles, and S2 is a specific surface area obtained when the positive active material particles are assumed to be spheres each having a diameter equal to an average particle size thereof.",
  "title": "NONAQUEOUS ELECTROLYTE POWER STORAGE ELEMENT AND POWER STORAGE DEVICE"
}