{
  "$type": "site.standard.document",
  "description": "A lithium ion secondary battery (1) includes: a positive electrode sheet (21) that includes a positive electrode active material layer (23) containing a positive electrode active material particle (24); a negative electrode sheet (31); and a nonaqueous electrolytic solution (40) that contains a…",
  "path": "/patents/940226",
  "publishedAt": "2016-07-20T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/0525",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "A lithium ion secondary battery (1) includes: a positive electrode sheet (21) that includes a positive electrode active material layer (23) containing a positive electrode active material particle (24); a negative electrode sheet (31); and a nonaqueous electrolytic solution (40) that contains a compound containing fluorine, wherein a surface (24n) of the positive electrode active material particle (24) includes a film (25) containing fluorine and phosphorus, and a ratio Cf/Cp satisfies 1.89‰¤Cf/Cp‰¤2.61 where Cf represents the number of fluorine atoms in the film (25), and Cp represents the number of phosphorus atoms in the film (25).",
  "title": "LITHIUM ION SECONDARY BATTERY, AND METHOD OF MANUFACTURING LITHIUM ION SECONDARY BATTERY"
}