Three-dimensional composite current collector and method for manufacturing the same

A three-dimensional composite current collector was prepared by combining energetic ion beams with electrochemical corrosion, which solved the problems of poor mechanical properties and high cost in the existing technology. It achieved efficient suppression of dendrite growth and volume expansion in lithium metal batteries, and improved the cycle life and specific capacity of lithium metal batteries.

CN120432548BActive Publication Date: 2026-06-12BEIJING SCI & TECH PATENT OFFICE
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Patent Information

Application Number
CN202510934297.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-07-08
Publication Date
2026-06-12
Estimated Expiration
2045-07-08

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Abstract

The application belongs to the technical field of battery materials, and discloses a three-dimensional composite current collector and a preparation method thereof.The three-dimensional composite current collector comprises a polymer substrate, and a high-entropy ion pinning mixed layer, a copper seed layer, a low-stress high-density copper layer, a surface three-dimensional nanosheet skeleton and a lithiumophilic high-entropy modification layer which are sequentially grown on the polymer substrate.The application adopts a method combining a charged ion beam with electrochemical corrosion to realize the preparation of a three-dimensional composite current collector with high adhesion, low internal stress and high cycle life, and effectively inhibits uncontrollable dendrite growth and volume expansion effect in a lithium metal battery.
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Citation Information

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