{
  "$type": "site.standard.document",
  "description": "A nonaqueous electrolyte secondary battery (10) includes a positive electrode plate (11), a negative electrode plate (12), a separator (13), and a nonaqueous electrolytic solution. The separator (13) is constituted of a polyolefin microporous membrane constituted of two or more layers of stacked…",
  "path": "/patents/1009363",
  "publishedAt": "2011-09-21T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/0525",
    "SANYO ELECTRIC CO [JP]"
  ],
  "textContent": "A nonaqueous electrolyte secondary battery (10) includes a positive electrode plate (11), a negative electrode plate (12), a separator (13), and a nonaqueous electrolytic solution. The separator (13) is constituted of a polyolefin microporous membrane constituted of two or more layers of stacked film containing polyethylene and polypropylene, one or both of the surface layers has a polypropylene mixture proportion exceeding 50% by mass and contains inorganic particles, and the nonaqueous electrolytic solution contains a dinitrile compound expressed by CN-(CH 2 )n-CN (where n ¥ 1 and n is an integer). Thus, the nonaqueous electrolyte secondary battery that even when stored at high temperature in a charged state is not prone to positive electrode degradation and has a large post-high temperature storage capacity recovery rate and good cycling characteristics can be provided.",
  "title": "Nonaqueous electrolyte secondary battery"
}