Composite solid electrolyte membrane, sodium ion battery and preparation method and application thereof

Through the combination of electrophoretic deposition method and nano-scale inorganic fillers, the problems of solvent residue and cost in solid-state battery preparation are solved, and the efficient preparation and performance improvement of composite solid electrolyte membranes are achieved, which is suitable for large-scale production.

CN118763290BActive Publication Date: 2025-03-25NORTH CHINA ELECTRIC POWER UNIV
2 Cites 0 Cited by

Patent Information

Application Number
CN202410907634.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-08
Publication Date
2025-03-25
Estimated Expiration
2044-07-08

AI Technical Summary

Technical Problem

The prior art has problems of solvent residue, contamination, time-consuming and high cost when preparing solid-state batteries, making it difficult to achieve large-scale preparation and performance improvement.

Method used

The composite solid electrolyte membrane is prepared by electrophoretic deposition method. By providing a deposited liquid containing a polymer matrix, an electrolyte salt, an inorganic filler and a plasticizing material, electrophoretic deposition is performed under constant pressure to form a composite solid electrolyte membrane, and nano-scale inorganic filler is added on the basis of the polymer matrix to improve conductivity and mechanical properties.

Benefits of technology

The preparation of thinner and better performance composite solid electrolyte membranes is achieved, which improves the energy density of the battery, reduces production costs, and solves the problems of solvent residues and contamination, which is suitable for large-scale production.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present invention discloses a composite solid electrolyte membrane, a sodium ion battery, and a preparation method and application thereof. The preparation method of the composite solid electrolyte membrane comprises: providing a deposition liquid containing at least a polymer matrix, an electrolyte salt, an inorganic filler, a plasticizer, and an inorganic filler; forming an electrophoretic deposition system with a counter electrode, a reference electrode, a conductive substrate as a working electrode, and the deposition liquid, and performing electrophoretic deposition under constant voltage conditions, thereby preparing a composite solid electrolyte membrane on the surface of the conductive substrate. The present invention adopts an electrophoretic deposition method to prepare a composite solid electrolyte membrane, which can be rapidly mass-produced, has high production efficiency, low cost, and has broad market prospects; at the same time, a dual salt electrolyte component is adopted, and nano-scale inorganic fillers are added to improve the structure of the polymer matrix, promote the migration of active ions, and construct a highly stable interface to obtain good battery cycle performance.
Need to check novelty before this filing date? Find Prior Art