{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
      "$link": "bafkreid2feb73pftrhboy72ooqhb3zpzyq44syllmqvmv532xgjfc5rbzq"
    },
    "mimeType": "image/png",
    "size": 96272
  },
  "description": "The invention provides an anode material for lithium ion secondary battery using a coated graphite powder as a raw material. The coated graphite powder is coated with carbonized material of thermoplastic resin of a carbonization yield of not more than 20wt% in a proportion of not more than 10 parts…",
  "path": "/patents/1082463",
  "publishedAt": "2004-11-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/0525",
    "TOYO TANSO CO [JP]"
  ],
  "textContent": "The invention provides an anode material for lithium ion secondary battery using a coated graphite powder as a raw material. The coated graphite powder is coated with carbonized material of thermoplastic resin of a carbonization yield of not more than 20wt% in a proportion of not more than 10 parts by weight the carbonized material per 100 parts by weight graphite powder. The graphite powder as coated with thermoplastic resin increases 5% or more in accumulative pore volume of the graphite powder having a pore size of 0.012 mu m to 40 mu m as measured by a mercury porosimeter method, as compared with the graphite powder before coated with the thermoplastic resin. The coated graphite powder has a mesopore volume defined by IUPAC of 0.01cc/g or less as calculated with the BJH method as viewed from desorption isotherm, which is also equal to 60% or less of the pore volume of the graphite powder before coated with the thermoplastic resin, an average particle size ranging from 10 mu m to 50 mu m, as measured by a laser-scattering-particle-size-distribution measuring device, and a ratio of standard deviation to the average particle size ( sigma /D) of 0.02 or less.",
  "title": "NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY"
}