一种具有复合结构的固态电池正极极片及制备方法和应用
By employing particle size gradient design and a two-step molding process, a multi-scale composite solid-state battery cathode sheet was constructed, which solved the problems of poor interfacial contact between the electrolyte and the electrode and lithium dendrite growth in solid-state batteries. This improved ionic conductivity and interfacial stability, and enhanced the cycle performance of lithium batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- LIYANG TIANMU PILOT BATTERY MATERIAL TECH CO LTD
- Filing Date
- 2025-10-24
- Publication Date
- 2026-07-17
AI Technical Summary
In existing solid-state batteries, poor solid-solid interface contact between the electrolyte and the electrode, high interface impedance, severe interfacial side reactions, and easy growth of lithium dendrites lead to low ion transport efficiency and interface instability, affecting battery performance.
By employing a particle size gradient design and a two-step molding process, the positive electrode active material is mechanically coated with an oxyfluoride solid electrolyte to construct a preliminary ion conduction and interface protection layer. Then, a nano-scale oxyfluoride solid electrolyte and in-situ polymer composite slurry are coated on the outer layer to form a solid-state battery positive electrode sheet with a multi-scale, functionally gradient composite structure.
It significantly improves the ionic conductivity and interfacial stability of the positive electrode of solid-state batteries, suppresses side reactions, and enhances the cycle performance and mechanical reliability of lithium batteries.
Smart Images
Figure CN121306937B_ABST