A high-conductivity composite solid-state electrolyte and a method for preparing the same
By optimizing the preparation method of Li2O and combining it with polyurethane, the problems of low ionic conductivity and complex preparation of composite solid electrolytes were solved, achieving high conductivity and simplifying the process, thus expanding the application range.
CN122118056APending Publication Date: 2026-05-29SICHUAN UNION SHINE NEW ENERGY SCI TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SICHUAN UNION SHINE NEW ENERGY SCI TECH CO LTD
- Filing Date
- 2026-01-19
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Existing composite solid electrolytes suffer from poor interfacial compatibility between organic polymers and inorganic materials, resulting in high grain boundary resistance and low ionic conductivity. Furthermore, their preparation methods are complex and the synthesis routes are long.
Method used
By optimizing the preparation method of Li2O, the reaction chamber environment is controlled by DC electric field and process gas to generate Li2O with lattice defects, which is then combined with polyurethane to form a composite solid electrolyte with high conductivity.
Benefits of technology
This achievement resulted in an ionic conductivity on the order of 10⁻³ S/cm, simplifying the preparation process, expanding the application areas, and improving electrochemical performance.
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Figure CN122118056A_ABST
Abstract
This invention relates to the field of composite solid electrolyte preparation technology, specifically to a high-conductivity composite solid electrolyte and its preparation method. The method involves placing an oxygen-containing lithium source at the positive electrode of an electric field in a reaction chamber, evacuating the reaction chamber; introducing a process gas into the reaction chamber, gradually increasing the discharge intensity of the electric field from 1-3 kW to 8-10 kW; maintaining the discharge intensity at 8-10 kW and stopping the introduction of the process gas into the reaction chamber; reducing the discharge intensity to 3-5 kW and maintaining it, then introducing the process gas into the reaction chamber to obtain Li₂O; wherein, the pressure inside the reaction chamber is controlled at 10 kcal / kg during the preparation process. ‑1 ~10 3 Pa; A solid electrolyte is obtained by composite molding of Li2O as a filler with polyurethane. A solid electrolyte prepared by the aforementioned method is also provided. This solves the problems of low ionic conductivity, long synthesis routes, and complex preparation methods in existing composite solid electrolytes.
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