Composite current collector and preparation method thereof, pole piece and battery
By adjusting the cathode target structure and using magnetron sputtering coating technology to prepare the composite fluid in one step, the problems of insufficient strength and complex process in the welding process of the existing composite fluid in the composite fluid are solved, and efficient and low-cost welding effect is achieved.
CN119725548AActive Publication Date: 2025-03-28SUZHOU ZHENLI NEW MATERIAL TECH CO LTD
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Patent Information
- Application Number
- CN202411928865.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2044-12-25
AI Technical Summary
Technical Problem
During the welding process, the existing composite fluid collecting problems are insufficient welding strength, large DC resistance, high perforation rate, complex process, low production efficiency and high cost.
Method used
By adjusting the structure of the cathode target, the ionization rate in the middle part is smaller than the ionization rate of the two ends, the composite fluid is prepared in one step by magnetron sputtering coating technology to form a structure with a thin middle part and a thick end at both ends.
Benefits of technology
The composite fluid collector has high bonding strength, small DC resistance and low perforation rate, while simplifying the process, improving production efficiency and reducing costs.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a composite current collector and a preparation method thereof, a pole piece and a battery, and belongs to the technical field of composite current collector manufacturing. The preparation method of the composite current collector comprises the following steps: forming a first metal layer and second metal layers on the two sides of the width direction of the first metal layer on the surface of a polymer layer by a cathode target material in a magnetron sputtering manner; wherein the cathode target material is provided with a first section located in the middle and second sections located at the two ends, the ionization rate of the first section is smaller than that of the second sections, so that the thickness of the first metal layer is smaller than that of the second metal layer, and the preparation method has the advantages of being simple in process, high in production efficiency, low in cost and convenient to implement; after being welded, the composite current collector prepared by the method also has the advantages of relatively high bonding strength at a welding part, relatively low direct-current resistance and relatively low perforation rate.
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