All-solid-state lithium battery interface buffer layer, preparation method and all-solid-state lithium battery
By setting up the interface buffer layer of lithium ion sieve adsorbent and polyethylene oxide in an all-solid-state lithium battery, the problem of solid electrolyte incompatible with the electrode is solved, the interface impedance is reduced, the battery's safety and cycle stability is improved, and the all-solid-state lithium battery can work normally at room temperature and exhibit high capacity and stable cycle performance.
Patent Information
- Application Number
- CN202210471971.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-04-29
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2042-04-29
AI Technical Summary
The solid electrolytes in existing all-solid-state lithium batteries are incompatible with the electrodes, resulting in large interface contact resistance, uneven current distribution and lithium dendrites.
An interface buffer layer is provided between the solid electrolyte and the electrode sheet of the all-solid lithium battery, including lithium ion sieve adsorbent and polyethylene oxide. The interface buffer layer is formed by H+/Li+ exchange reaction and hydrogen bonding of polyethylene oxide, reducing the interface impedance and improving the lithium ion transport capability.
By setting the interface buffer layer, the interface impedance is reduced, lithium dendrites are avoided, and the battery's safety and cycle stability are improved, so that all-solid-state lithium batteries can work normally at room temperature and show high capacity and stable cycle performance.