{
  "$type": "site.standard.document",
  "description": "The present invention provides a positive electrode active material for lithium ion battery which attains a lithium ion battery having high safety. The positive electrode active material has a layer structure for a lithium ion battery, in which the positive electrode active material is represented…",
  "path": "/patents/994121",
  "publishedAt": "2013-01-09T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C01G53/42",
    "JX NIPPON MINING & METALS CORP [JP]"
  ],
  "textContent": "The present invention provides a positive electrode active material for lithium ion battery which attains a lithium ion battery having high safety. The positive electrode active material has a layer structure for a lithium ion battery, in which the positive electrode active material is represented by the following composition formula: €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒLi x (Ni y M 1-y )O z (wherein M represents Mn and Co, x is 0.9 to 1.2, y is 0.8 ± 0.025, and z is 1.8 to 2.4), and ”T = T41-T44, that is a difference between a first exothermic peak temperature T44 (°C) of a first lithium ion battery and a first exothermic peak temperature T41 (°C) of a second lithium ion battery, both are obtained by a differential scanning calorimetry (DSC) carried out at temperature increase rate of 5°C/min, when a lithium ion battery using a positive electrode mixture prepared with the positive electrode active material, a binder, and a conductive material in weight ratio of 91%, 4.2%, and 4.8%, respectively is charged to 4.4 V for the first lithium ion battery and 4.1 V for the second lithium ion battery and electrolyte liquid containing 1 M-LiPF 6 dissolved in a mixture solvent of ethylene carbonate (EC) and dimethyl carbonate (DMC) (volume ratio 1 : 1) is used per 1.0 mg of a positive electrode mixture, satisfies the condition of ”T ‰¤ 15 (°C).",
  "title": "POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION BATTERY, POSITIVE ELECTRODE FOR LITHIUM ION BATTERY, AND LITHIUM ION BATTERY."
}