{
  "$type": "site.standard.document",
  "description": "Silicon oxide particles each comprising an inner portion having an iron content of 10-1,000 ppm and an outer portion having an iron content of up to 30 ppm are suitable as negative electrode active material in nonaqueous electrolyte secondary batteries. Using a negative electrode comprising the…",
  "path": "/patents/1383176",
  "publishedAt": "2016-05-26T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M4/483",
    "Shin-Etsu Chemical Co., Ltd."
  ],
  "textContent": "Silicon oxide particles each comprising an inner portion having an iron content of 10-1,000 ppm and an outer portion having an iron content of up to 30 ppm are suitable as negative electrode active material in nonaqueous electrolyte secondary batteries. Using a negative electrode comprising the silicon oxide particles as active material, a lithium ion secondary battery or electrochemical capacitor having a high capacity and improved cycle performance can be constructed.",
  "title": "SILICON OXIDE PARTICLES, MAKING METHOD, LITHIUM ION SECONDARY BATTERY, AND ELECTROCHEMICAL CAPACITOR"
}