{
  "$type": "site.standard.document",
  "description": "The present disclosure aims to, in a nonaqueous electrolyte secondary battery using a silicon compound as a negative electrode active material, suppress deformation of a negative electrode. A nonaqueous electrolyte secondary battery according to one example of an embodiment includes a winding type…",
  "path": "/patents/1437319",
  "publishedAt": "2022-05-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/0431",
    "SANYO ELECTRIC CO [JP]"
  ],
  "textContent": "The present disclosure aims to, in a nonaqueous electrolyte secondary battery using a silicon compound as a negative electrode active material, suppress deformation of a negative electrode. A nonaqueous electrolyte secondary battery according to one example of an embodiment includes a winding type electrode body in which a positive electrode (11) and a negative electrode (12) are spirally wound with at least one separator interposed therebetween. In a negative electrode mixture layer (41), a silicon compound is contained as a negative electrode active material. A winding-start side end (42) of the negative electrode mixture layer (41) extends to a winding-start end side of the electrode body past a winding-start side end (32) of a positive electrode mixture layer (31). A length Y (mm) of a portion of the negative electrode mixture layer (41) extending from the winding-start side end (32) of the positive electrode mixture layer (31) and a rate X (percent by mass) of the silicon compound with respect to the total mass of the negative electrode active material satisfy a relationship of Y≥3X-15 (6≤X≤15).",
  "title": "NONAQUEOUS ELECTROLYTE SECONDARY BATTERY"
}