{
  "$type": "site.standard.document",
  "description": "Provided is a sodium-ion secondary battery having a high capacity and excellent safety. A sodium-ion secondary battery includes: a positive electrode containing a positive-electrode active material made of a crystallized glass containing crystals represented by a general formula NaMPO(where…",
  "path": "/patents/1372317",
  "publishedAt": "2025-01-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M4/5825",
    "NIPPON ELECTRIC GLASS CO., LTD."
  ],
  "textContent": "Provided is a sodium-ion secondary battery having a high capacity and excellent safety. A sodium-ion secondary battery includes: a positive electrode containing a positive-electrode active material made of a crystallized glass containing crystals represented by a general formula NaMPO(where 1≤x≤2.8, 0.95≤y≤1.6, 6.5≤z≤8, and M is at least one selected from among Fe, Ni, Co, Mn, and Cr); a negative electrode containing a negative-electrode active material made of hard carbon; and a non-aqueous electrolyte.",
  "title": "SODIUM ION SECONDARY BATTERY"
}