Aluminum foil current collector for aqueous batteries, method for manufacturing the same, positive electrode sheet, and aqueous battery
By constructing a multi-component composite corrosion-resistant functional layer on the surface of aluminum foil, the problems of high resistance, easy corrosion, and high cost of current collector materials for aqueous zinc-based batteries have been solved, achieving high cycle life and low-cost application of the battery.
CN122291384APending Publication Date: 2026-06-26LISHEN (QINGDAO) NEW ENERGY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- LISHEN (QINGDAO) NEW ENERGY CO LTD
- Filing Date
- 2026-03-19
- Publication Date
- 2026-06-26
AI Technical Summary
Technical Problem
Existing current collector materials for aqueous zinc-based batteries suffer from high resistivity, high density, susceptibility to corrosion, and high cost, which limits their commercialization.
Method used
Using aluminum foil as a substrate, a multi-component composite corrosion-resistant functional layer is formed by coating its surface with a composite slurry containing titanium, zirconium, and carbon sources, combined with a vacuum high-temperature sintering process, thereby enhancing interfacial bonding and conductivity.
Benefits of technology
It significantly improves the cycle life and reliability of aqueous zinc-based batteries, reduces battery cost and energy density limitations, and enhances interfacial bonding and conductivity.
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Figure CN122291384A_ABST
Abstract
This invention relates to the field of battery technology, and in particular to an aluminum foil current collector for aqueous batteries, its preparation method, a positive electrode sheet, and an aqueous battery. The preparation of the aluminum foil current collector includes the following steps: coating a precursor slurry onto the surface of an aluminum foil and drying it to obtain a precursor coating; sintering the precursor coating at high temperature to obtain the aluminum foil current collector for aqueous batteries; the precursor slurry includes a titanium source, a zirconium source, a carbon source, and a solvent. This invention constructs a multi-element composite corrosion-resistant functional layer in situ on the surface of the aluminum foil by composite design and doping treatment of elements such as Ti, C, and Zr on the aluminum foil surface, combined with a vacuum high-temperature sintering process. This current collector can effectively block electrolyte erosion, suppress interfacial side reactions, and maintain low interfacial resistance, thereby significantly improving the cycle life and reliability of aqueous zinc-based batteries.
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