{
  "$type": "site.standard.document",
  "description": "A lithium ion secondary battery having high energy density and of excellent safety, and a cathode active material used therefor are provided. The cathode active material is a Li-containing composite oxide comprising a plurality of transition metal elements selected from Cr, Mn, Fe, Co, Ni and Cu…",
  "path": "/patents/1091464",
  "publishedAt": "2003-12-03T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C01G45/1228",
    "HITACHI LTD [JP]"
  ],
  "textContent": "A lithium ion secondary battery having high energy density and of excellent safety, and a cathode active material used therefor are provided. The cathode active material is a Li-containing composite oxide comprising a plurality of transition metal elements selected from Cr, Mn, Fe, Co, Ni and Cu, in which the composition of the transition metal elements is in a range not inclined to particular transition metal elements. The composite oxide having a crystal structure in which the range of an angle ² formed between a axis and b axis of the crystallographic structure is controlled as: 90° < ² ‰¦ 110°. The composite oxide is used as the cathode active material of a lithium ion secondary battery.",
  "title": "Cathode active material for lithium ion secondary battery"
}