A structural electrode based on Kevlar fiber reinforced current collector, its fabrication method and structural battery

By modifying the Kevlar fiber-reinforced current collector and depositing conductive metals, combined with a special encapsulation method, the load-bearing capacity and overall performance problems of traditional structural batteries have been solved, resulting in structural batteries with high specific energy and mechanical strength.

CN119764460BActive Publication Date: 2026-05-26CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
Filing Date
2024-12-18
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Traditional cells in existing battery structures lack load-bearing capacity, and multifunctional composite material structure batteries have shortcomings in overall performance, with low overall energy density, making it difficult to achieve the dual goals of weight reduction and improved system efficiency.

Method used

Kevlar fiber reinforced current collectors are used. The Kevlar fibers are modified with trimethylchlorosilane and conductive metal is deposited. The structural electrode is prepared by electrochemical deposition, slurry coating or vapor deposition. The encapsulation shell and the structural electrode are fixed together by epoxy resin-curing agent layer to achieve mechanical coupling.

Benefits of technology

It improves the mechanical strength and cycle stability of the structural electrodes, alleviates battery volume expansion and stress accumulation, enhances the mechanical performance and specific energy of the structural battery, and enables continuous load transfer.

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Abstract

This invention provides a structural electrode, its fabrication method, and a structural battery based on a Kevlar fiber-reinforced current collector. The structural electrode includes a Kevlar fiber-reinforced current collector and an electrode material layer disposed on its surface. The Kevlar fiber-reinforced current collector is a modified Kevlar fiber layer modified with a conductive metal, obtained by modifying Kevlar fibers with trimethylchlorosilane. The Kevlar fiber-reinforced current collector in this invention has higher mechanical strength than traditional metal foil current collectors, thereby improving the mechanical strength of the structural electrode prepared using this current collector. The structural electrode of this invention can effectively alleviate volume expansion and stress accumulation, ensuring high specific energy of the battery while improving cycle stability. The structural battery of this invention adopts an integrated continuous packaging method. Through the mechanical coupling between the packaging shell and the structural electrode, the load is continuously transferred between the internal cell and the external packaging, improving the mechanical performance of the structural battery.
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