{
  "$type": "site.standard.document",
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  "description": "The present invention provides a lithium-ion secondary battery and a manufacturing method thereof. A negative electrode plate of the lithium-ion secondary battery is a prelithiated negative electrode plate, a negative electrode active substance is a carbon-based negative electrode material, and the…",
  "path": "/patents/1433310",
  "publishedAt": "2022-04-20T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/0525",
    "CONTEMPORARY AMPEREX TECHNOLOGY CO LTD [CN]"
  ],
  "textContent": "The present invention provides a lithium-ion secondary battery and a manufacturing method thereof. A negative electrode plate of the lithium-ion secondary battery is a prelithiated negative electrode plate, a negative electrode active substance is a carbon-based negative electrode material, and the carbon-based negative electrode material and a pre-intercalated lithium metal in the negative electrode plate are lithiated to form a prelithiated compound LiC, where x = 12∼150. A capacity of a unit area of the negative electrode active substance/a capacity of a unit area of a positive electrode active substance = 1.2∼2.1. The capacity of a unit area of the negative electrode active substance/(the capacity of a unit area of the positive electrode active substance + an amount of active lithium deintercalatable from the pre-lithiated compound LiC in a unit area of a negative electrode film) ≥ 1.10. After the lithium-ion secondary battery in the present invention is fully charged during use, the negative electrode active substance may have enough vacancies for receiving all lithium ions deintercalated from the positive electrode active substance, and excessive lithium ions are stored at a negative electrode after full discharge. Therefore, capacity loss of the lithium-ion secondary battery can be reduced effectively, and the lithium-ion secondary battery has good cycling performance and storage performance.",
  "title": "LITHIUM ION SECONDARY BATTERY AND MANUFACTURING METHOD THEREFOR"
}