复合集流体及其制备方法、电极极片、储能装置和用电装置
By forming grooves on the aluminum layer to embed the copper layer, the problems of poor ductility and low conductivity of aluminum current collectors are solved, realizing a composite current collector with low cost, good ductility and high conductivity, which improves the electrode production yield and battery cycle performance.
CN117832513BActive Publication Date: 2026-07-17XIAMEN HITHIUM ENERGY STORAGE TECHNOLOGY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAMEN HITHIUM ENERGY STORAGE TECHNOLOGY CO LTD
- Filing Date
- 2024-01-26
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
In existing sodium-ion batteries, copper foil is expensive as the negative electrode current collector, while aluminum current collector has poor ductility, leading to problems such as strip breakage during rolling and poor conductivity.
Method used
A copper-aluminum composite current collector is used. By forming grooves on the aluminum layer and embedding the copper layer, a physical composite structure is formed, which avoids the alloying reaction and improves ductility and conductivity.
Benefits of technology
It reduces the cost of current collectors, decreases the risk of strip breakage, improves electrode production yield and battery cycle performance, and enhances electron transport.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN117832513B_ABST
Abstract
本申请公开了复合集流体及其制备方法、电极极片、储能装置和用电装置。该复合集流体包括：铝层和铜层，所述铝层包括沿其厚度方向相对设置的第一面和第二面，所述第一面和所述第二面的至少之一上设有凹槽，所述凹槽沿第一方向延伸，所述第一方向与所述铝层的厚度方向相交；所述铜层嵌设于所述凹槽内，且所述铜层的嵌设厚度不大于所述凹槽的深度。
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