Impact-resistant compressed battery electrode with negative poisson's ratio structure and method of making

By fabricating electrodes using negative Poisson's ratio structures and directional freezing technology, the mechanical durability and electrochemical performance of flexible battery electrodes under deformation conditions have been solved, realizing an efficient and low-cost electrode fabrication method applicable to various battery systems.

CN119480890BActive Publication Date: 2026-05-29SOUTHEAST UNIV
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHEAST UNIV
Filing Date
2024-11-11
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies struggle to maintain the mechanical durability and electrochemical performance of flexible battery electrodes under deformation conditions. Furthermore, traditional preparation methods are complex, costly, and environmentally unfriendly, making efficient development difficult.

Method used

A method for preparing shock-resistant compression battery electrodes using a negative Poisson's ratio structure is proposed. This method utilizes directional freezing technology to assist in mold forming and combines it with microstructure design to prepare electrodes with directional pores and biomimetic structures. The process includes mixing electrode active materials, conductive agents, and binders, followed by freeze-drying to achieve multi-scale electrode structures.

Benefits of technology

It achieves the maintenance of electrochemical performance during compression deformation, while simplifying the process, reducing costs, and making it suitable for mass production. The electrode has excellent deformability and tunable microporous structure, making it suitable for a variety of battery systems.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119480890B_ABST
    Figure CN119480890B_ABST
Patent Text Reader

Abstract

The present application relates to the technical field of deformed battery energy storage devices, and relates to a preparation method of an impact-resistant compression battery electrode with a negative Poisson's ratio structure, in which lithium ion battery electrode active materials, a conductive agent, a binder and a solvent are mixed in a certain mass ratio to prepare electrode ink, the ink is injected into a mold with a negative Poisson's ratio structure made by a 3D printer, and directional freezing is performed on a copper plate immersed in liquid nitrogen.After post-processing such as freeze-drying, a multi-scale electrode with a directional pore structure on a microscale and a macroscopic negative Poisson's ratio structure is finally obtained.The multi-scale biomimetic structure electrode has excellent compressibility and can achieve 50% compression.The electrode also has high specific capacity, good cycle stability and rate performance.The method for preparing a deformed electrode by directional freezing assisted by a mold has low cost, simple operation, wide application range and great application potential.
Need to check novelty before this filing date? Find Prior Art