{
  "$type": "site.standard.document",
  "description": "In a nonaqueous electrolyte secondary battery including at least negative electrode, a positive electrode, and a lithium-ion-conductive nonaqueous electrolyte, a lithium-containing silicon oxide which is represented by a composition formula LiSiOwhere a lithium content x and an oxygen content y are…",
  "path": "/patents/1081128",
  "publishedAt": "2005-01-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/0525",
    "SEIKO INSTR INC [JP]"
  ],
  "textContent": "In a nonaqueous electrolyte secondary battery including at least negative electrode, a positive electrode, and a lithium-ion-conductive nonaqueous electrolyte, a lithium-containing silicon oxide which is represented by a composition formula LiSiOwhere a lithium content x and an oxygen content y are restricted to be in respective ranges of 1.5 ≦ x ≦ 4 and 0 < y < 2 is used as a negative -electrode active material. It is even preferable that the above negative electrode be combined with a positive electrode having, as a positive-electrode active material, a transition metal oxide, p articularly a lithium-containing metal oxide, selected from Co, Ni, Mn, Fe, V, W, Nb, Ti, and the like. [0002] The potential of the negative-electrode active material is low, i.e., base, the charge/discharge capacity is large in a base potential range of 0 to 1 V with respect to metal lithium, and the polarization (internal resistance) during charge and discharge is small. Therefore, there can be obtained a secondary battery which has a high voltage and a high energy efficiency, is superior in large-current chraging/dischraging characteristics, and has a high charging/discharging efficiency. Further, the secondary battery is highly reliable; that is, it is free of such failures as internal short-ciruiting due to dendrite generation, is stable, and has a long cycle life.",
  "title": "Nonaqueous electrolyte secondary battery"
}