{
  "$type": "site.standard.document",
  "description": "There is provided is a lithium ion secondary battery (20). The lithium ion secondary battery (20) includes: a positive electrode (21) having a positive electrode active material layer (21 a) containing a positive electrode active material containing a vanadium-based compound; and a negative…",
  "path": "/patents/985228",
  "publishedAt": "2013-04-03T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M4/133",
    "FUJI HEAVY IND LTD [JP]"
  ],
  "textContent": "There is provided is a lithium ion secondary battery (20). The lithium ion secondary battery (20) includes: a positive electrode (21) having a positive electrode active material layer (21 a) containing a positive electrode active material containing a vanadium-based compound; and a negative electrode (22) having a negative electrode active material layer (22a) containing a negative electrode active material into which lithium ions can be inserted/removed reversibly. A vanadium-based compound is dispersed in the negative electrode active material layer (22a). As a result, a vanadium-based compound, corresponding to the vanadium-based compound contained in the positive electrode active material is dispersed in the negative electrode active material layer (22a).",
  "title": "Lithium ion secondary battery"
}