A method for the cold-pressing-solidification preparation of a porous oxide solid-state electrolyte
By employing a cold pressing-solidification method for porous oxide solid electrolytes, utilizing planetary ball mill mixing and segmented sintering technology, combined with polymerization reaction and negative pressure wetting under an anhydrous environment, the molding quality problem of porous oxide solid electrolytes was solved, and electrolytes with high ionic conductivity and low impedance were prepared.
Patent Information
- Application Number
- CN202610714343.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-22
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, solid electrolytes prepared by porous polymer composite process have limited high temperature resistance and structural stability. The interface between polymer and oxide filler is loose and the pore distribution is poorly controllable, resulting in discontinuous ion transport channels and high interfacial impedance. In addition, conventional molding process makes it difficult to accurately control the compactness and porous structure of green body, resulting in low electrolyte ionic conductivity.
A porous oxide solid electrolyte is prepared by cold pressing and curing. The oxide powder, pore-forming agent and binder are mixed in a planetary ball mill, and then subjected to two-stage gradient cold pressing at room temperature and segmented step heating sintering. Combined with polymerization reaction in an anhydrous and oxygen-free environment and negative pressure wetting, a porous oxide solid electrolyte skeleton is formed. Then, it is cured by constant temperature heating to form a composite conductive structure of rigid oxide skeleton and flexible polymer.
This method achieves uniform molding and improved stability of porous oxide solid electrolytes, solving the problems of uneven pore distribution, poor interfacial contact, and discontinuous ion conduction paths in traditional processes, and significantly improving ionic conductivity and reducing interfacial impedance.
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Abstract
Citation Information
Patent Citations
Solid electrolyte and preparation method thereof
CN113871723A