{
  "$type": "site.standard.document",
  "description": "There is provided a positive electrode active material comprising a large number of crystal grains composed of lithium manganate of spinel structure, wherein the large number of crystal grains contain primary particles of 3 to 20 µm in particle diameter by 70 areal % or more relative to all the…",
  "path": "/patents/1002961",
  "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 comprising a large number of crystal grains composed of lithium manganate of spinel structure, wherein the large number of crystal grains contain primary particles of 3 to 20 µm in particle diameter by 70 areal % or more relative to all the crystal grains, the primary particles contain a component having a rectangular plane, and the ratio of the total area of all the rectangular planes to the total surface area of the primary particles is 0.5 to 5%.",
  "title": "POSITIVE ELECTRODE ACTIVE MATERIAL AND LITHIUM SECONDARY BATTERY USING SAME"
}