电池单体、其制备方法及应用

By introducing a lithium replenishing agent with a core-conductive carbon layer-intercalation compound composite structure into the positive electrode of a lithium-ion battery, the problems of battery gas expansion and electrolyte consumption caused by the positive electrode lithium replenishment process are solved, achieving efficient lithium replenishment and improved safety performance.

CN122068131BActive Publication Date: 2026-07-17ZHEJIANG JINKO ENERGY STORAGE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG JINKO ENERGY STORAGE CO LTD
Filing Date
2026-04-22
Publication Date
2026-07-17

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Abstract

本发明提供了一种电池单体、其制备方法及应用。该制备方法包括：将正极极片、负极极片、隔膜、电解液、壳体和顶盖进行组装，化成后得到电池单体；正极极片包括正极集流体和正极膜层，正极膜层包括正极活性材料和补锂剂；补锂剂包括内核、导电碳层和插层化合物，内核包括Li5FeO4和Li2C2O4的复合物，导电碳层包覆在内核表面，插层化合物嵌入导电碳层中，插层化合物包括含锂钛酸盐和 / 或含锂钼酸盐。本发明利用补锂剂的复合包覆层结构和活性氧猝灭机制，能够在高效补锂的同时，显著降低电池单体储存和循环过程中的产气量，减少电解液消耗，改善电池单体的安全性能和循环寿命。
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Citation Information

Patent Citations

  • Positive electrode lithium supplementing material and preparation method thereof, positive electrode plate and lithium ion battery

    CN119447299A

  • Lithium supplementing composite layer and preparation method thereof, lithium supplementing method, pre-lithiated negative pole piece, secondary battery and electronic device

    CN119920903A