Preparation method of polymer solid electrolyte based on electrostatic spinning technology
Ultra-thin fibers are prepared through electrospinning technology and combined with ion exchange in-situ synthesis, which solves the problems of high thickness and insufficient mechanical strength of solid electrolyte materials, and achieves polymer solid electrolytes with high energy density and excellent mechanical properties.
CN119725711AActive Publication Date: 2025-03-28FUDAN UNIVERSITY
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Patent Information
- Application Number
- CN202411910408.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2044-12-24
AI Technical Summary
Technical Problem
Existing solid-state electrolyte materials have problems of high thickness and insufficient mechanical strength in solid-state battery applications with high safety and high energy density.
Method used
Ultra-thin fibers are prepared by electrospinning technology, and the fibers are oriented and tensile-oriented through high-speed receiving rollers, and ionic liquid-based polymer solid electrolyte is synthesized in situ with ion exchange.
Benefits of technology
A polymer solid electrolyte with both extremely low thickness and ultra-high mechanical strength is achieved, which significantly improves energy density, and maintains excellent mechanical properties and high ionic conductivity.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a preparation method of a polymer solid electrolyte based on an electrostatic spinning technology, and belongs to the technical field of all-solid-state lithium battery manufacturing. The preparation method comprises the following steps: mixing a polymer solution with an ionic liquid solution, and heating a solvent in a water bath to obtain a polymer and ionic liquid mixed solution; the mixed solution is subjected to electrostatic spinning, a high-speed receiving roller is adopted for receiving to form a film, then the film is placed in a vacuum oven for drying, a solvent is removed, and an oriented Poly (x)-IL-EA film is obtained; and soaking the thin film Poly (x)-IL-EA in a pre-prepared ionic liquid solution of a high-concentration lithium salt, and carrying out ion replacement to obtain the polymer composite all-solid-state electrolyte Li-Poly (x)-IL-EA. According to the polymer solid electrolyte prepared by the method disclosed by the invention, the energy density is remarkably improved under the conditions of the same mass and the same volume, and the polymer solid electrolyte has a remarkable economic value and can be applied to a lithium metal battery with high energy density and high safety.
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