{
  "$type": "site.standard.document",
  "description": "A negative electrode active material for a lithium ion secondary battery, the negative electrode active material including a porous carbon, wherein, in the porous carbon, a pore having a diameter of 20 nm to 1 μm is formed in the surface of a carbon matrix and a nanopore communicating with the pore…",
  "path": "/patents/1192982",
  "publishedAt": "2017-10-19T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M4/587",
    "NEC Corporation"
  ],
  "textContent": "A negative electrode active material for a lithium ion secondary battery, the negative electrode active material including a porous carbon, wherein, in the porous carbon, a pore having a diameter of 20 nm to 1 μm is formed in the surface of a carbon matrix and a nanopore communicating with the pore and having a diameter of 15 nm or smaller is formed inside the carbon matrix.",
  "title": "NEGATIVE ELECTRODE ACTIVE MATERIAL FOR A LITHIUM ION SECONDARY BATTERY AND PRODUCTION METHOD FOR SAME, AND NEGATIVE ELECTRODE AND LITHIUM ION SECONDARY BATTERY"
}