{
  "$type": "site.standard.document",
  "description": "There is provided a positive electrode active material having a specific surface area of 0.1 to 0.5 m 2 /g, which contains a large number of crystal grains containing primary particles of 5 to 20 µm in particle diameter, composed of lithium manganate of spinel structure containing lithium and…",
  "path": "/patents/1002962",
  "publishedAt": "2012-05-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M4/505",
    "NGK INSULATORS LTD [JP]"
  ],
  "textContent": "There is provided a positive electrode active material having a specific surface area of 0.1 to 0.5 m 2 /g, which contains a large number of crystal grains containing primary particles of 5 to 20 µm in particle diameter, composed of lithium manganate of spinel structure containing lithium and manganese as the constituent elements, and a bismuth compound containing bismuth. The proportion of the primary particles contained in the large number of crystal grains is 70 areal % or more and the proportion of the bismuth contained in the bismuth compound is 0.005 to 0.5 mol % relative to the manganese contained in the lithium manganate.",
  "title": "POSITIVE ELECTRODE ACTIVE MATERIAL AND LITHIUM SECONDARY BATTERY"
}