{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "There is provided a lithium ion battery having high flame retardancy and good cycle characteristics on a long-term basis. The lithium ion battery according to this exemplary embodiment is a lithium ion battery comprising a nonaqueous electrolytic solution or gel electrolyte containing a Li salt and…",
  "path": "/patents/979996",
  "publishedAt": "2014-01-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/0525",
    "NEC ENERGY DEVICES LTD [JP]"
  ],
  "textContent": "There is provided a lithium ion battery having high flame retardancy and good cycle characteristics on a long-term basis. The lithium ion battery according to this exemplary embodiment is a lithium ion battery comprising a nonaqueous electrolytic solution or gel electrolyte containing a Li salt and an oxoacid ester derivative of phosphoric acid; a group of stacked electrode in which positive electrodes comprising a positive electrode layer comprising a positive electrode active material disposed on at least one surface of a positive electrode current collector, and negative electrodes comprising a negative electrode layer comprising a negative electrode active material disposed on at least one surface of a negative electrode current collector are alternately stacked via separators; and a package containing the nonaqueous electrolytic solution or gel electrolyte and the group of stacked electrode, wherein both of two electrodes A disposed on outermost sides of the group of stacked electrode, respectively, satisfy 0 ‰¤ (Wc/Wb) ‰¤ 0.55 when a mass of an electrode active material contained in an electrode active material-coated layer B disposed on a group-of-stacked-electrodes side of an electrode current collector is Wb, and a mass of an electrode active material contained in an electrode active material-coated layer C disposed on a package side of the electrode current collector is Wc.",
  "title": "LITHIUM ION BATTERY"
}