{
  "$type": "site.standard.document",
  "description": "Provided is a carbon material for negative electrode capable of suppressing capacity degradation due to repeated charge and discharge cycles, storage while being charged or floating charge. A graphite material having lattice distortion for lithium-ion secondary battery negative electrode is…",
  "path": "/patents/987568",
  "publishedAt": "2013-08-14T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C01B32/20",
    "JX NIPPON OIL & ENERGY CORP [JP]"
  ],
  "textContent": "Provided is a carbon material for negative electrode capable of suppressing capacity degradation due to repeated charge and discharge cycles, storage while being charged or floating charge. A graphite material having lattice distortion for lithium-ion secondary battery negative electrode is obtained by a manufacturing method comprising the steps of: pulverizing and classifying a raw coke composition obtained from a heavy-oil composition undergone coking by delayed coking process, the raw coke composition having a H/C atomic ratio that is a ratio of hydrogen atoms H and carbon atoms C of 0.30 to 0.50 and having a micro-strength of 7 to 17 mass% to obtain powder of the raw coke composition; giving compressive stress and shear stress to the powder of the raw coke composition so that average circularity is 0.91 to 0.97 to obtain round powder; heating the round powder to obtain a carbonized composition; and graphitizing the carbonized composition. The graphite material has a size of a crystallite Lc(112) of 4 nm to 30 nm, the size being calculated from a (112) diffraction line obtained by X-ray wide-angle diffractometry, and has lattice distortion in the range from 0.001 to 0.085, the lattice distortion being calculated from a (004) diffraction line and a (006) diffraction line.",
  "title": "GRAPHITE MATERIAL WITH LATTICE DISTORTION FOR USE IN LITHIUM-ION SECONDARY BATTERY NEGATIVE ELECTRODES, AND LITHIUM-ION SECONDARY BATTERY"
}