Solid-state electrolyte ceramic sheet and solid-state lithium ion battery
By combining a Zr/Ge co-doped LATP ceramic matrix with an amorphous Al2O3 thin layer, the bulk ion transport and interfacial stability of solid-state lithium-ion batteries were optimized, the interfacial impedance problem of NASICON-type solid electrolyte ceramic sheets was solved, and the electrochemical performance and cycle stability of the battery were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGSU RELIANCE ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2026-04-21
- Publication Date
- 2026-06-02
AI Technical Summary
The high interfacial impedance of existing NASICON-type solid electrolyte ceramic sheets leads to reduced electrochemical performance of solid lithium-ion batteries and low capacity retention over long cycles.
A structural design combining a Zr/Ge co-doped LATP ceramic matrix with an amorphous Al2O3 thin layer was adopted. A continuous amorphous Al2O3 thin layer was deposited on the side of the ceramic matrix facing the negative electrode using atomic layer deposition technology to form an inorganic interface layer with a thickness of 1-5 nm, thereby optimizing bulk ion transport and interface stability.
It significantly improves the ionic conductivity, interfacial impedance, cycle stability, and rate performance of solid-state lithium-ion batteries, solves the core bottleneck of LATP-based solid electrolytes, and achieves long-term electrochemical performance stability and efficient lithium-ion transport.
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