Composite ceramic solid electrolyte diaphragm material as well as preparation method and application thereof

By introducing a polydopamine coating on the surface of nano solid electrolyte particles and optimizing the contact interface with the polymer substrate, the dispersion and contact problems of nanoparticles in the polymer substrate are solved, the ionic conductivity and mechanical strength of the electrolyte membrane are improved, and the battery cycle life is extended, making it suitable for mass production processes and large-scale production.

CN120657376APending Publication Date: 2025-09-16SHANGHAI EMPEROR OF CLEANING HI TECH +1
7 Cites 1 Cited by

Patent Information

Application Number
CN202510856721.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-25
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

In the existing technology, nano solid electrolyte particles have dispersion and contact problems in the polymer matrix, resulting in uneven distribution of ion channels, reduced lithium ion transmission efficiency and the risk of lithium dendrite growth.

Method used

By introducing the bidirectional adhesion of polydopamine, the contact interface between LLZTO nanoparticles and PVDF-HFP was optimized to prepare a composite ceramic solid electrolyte membrane. LLZTO nanoparticles were coated with polydopamine and composited with PVDF-HFP to form a uniform ion transmission channel.

Benefits of technology

It improves the ionic conductivity and mechanical strength of the electrolyte membrane, inhibits the growth of lithium dendrites, extends the battery cycle life, and is suitable for mass production processes and large-scale production.

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

Abstract

The invention belongs to the technical field of lithium batteries, and particularly relates to a composite ceramic solid electrolyte diaphragm material and a preparation method and application thereof. Wherein the lithium ion conductor filler is LLZTO (lithium zinc oxide) nano particles coated with polydopamine; the mass dosage of the polydopamine is not more than 2 times that of the LLZTO nanoparticles, and the thickness of a coating layer formed by the polydopamine is less than 10nm. Compared with the prior art, the problems of dispersity and contact of nano solid electrolyte particles in a polymer substrate in the prior art are solved. According to the scheme, the contact interface of LLZTO nanoparticles and PVDF-HFP is optimized by introducing the interface layer and particularly utilizing the bidirectional cohesiveness of polydopamine, and the distribution of the nanofiller in a polymer is improved.
Need to check novelty before this filing date? Find Prior Art