{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
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  "description": "A negative active material for a secondary battery, an electrode for a secondary battery including the same, a secondary battery, and a manufacturing method thereof are disclosed. The negative active material for a secondary battery includes a core carbon material whose edge is partially or…",
  "path": "/patents/1016092",
  "publishedAt": "2011-02-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C01B32/05",
    "LS MTRON LTD [KR]"
  ],
  "textContent": "A negative active material for a secondary battery, an electrode for a secondary battery including the same, a secondary battery, and a manufacturing method thereof are disclosed. The negative active material for a secondary battery includes a core carbon material whose edge is partially or entirely coated with a carbide layer, wherein a particle size distribution (PSD) broad value ranges from 0.1 to 0.85 and, when the negative active material is pressed at a pressure of 2 tons, a pore volume rate before and after the compression is 0.2 or greater. A discharge capacity, efficiency, and capacity retention in a long-term cycle can be improved by optimizing the PSB broad value related to a particle distribution among physical properties of a carbon material-based negative active material for a secondary battery, and a pore volume rate of the negative active material before and after compression.",
  "title": "CATHODE ACTIVE MATERIAL FOR A SECONDARY BATTERY, ELECTRODE FOR A SECONDARY BATTERY AND SECONDARY BATTERY COMPRISING THE SAME, AND A PRODUCTION METHOD THEREFOR"
}