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Molybdenum Foil and Tungsten Foil for Aluminum-ion Battery

Molybdenum foil is a very thin molybdenum sheet. Its thickness usually ranges from 0.002mm to 0.1mm and width should be ≥ 50mm. As the metal foil has the characteristics of high purity, low resistance, good electrochemical performance and chemical stability, it can be used as a current collector in aluminum ion batteries.  

Aluminum-ion battery is a rechargeable battery composed of negatively charged aluminum anode, positively charged graphite cathode, diaphragm and electrolyte, and has similar functions to lithium-ion batteries. Due to the abundant and easy availability of aluminum resources, the use of non-flammable and electrochemically stable electrolytes, and the high theoretical specific capacity of aluminum metal anodes, it has attracted great attention from energy storage researchers.

However, the development of aluminum-ion batteries also faces many problems, such as the current collector, the corrosion of the aluminum negative electrode, and the high cost of the electrolyte. Among them, current collectors with good effect are mostly metal molybdenum foil and tantalum foil with inert characteristics and stable performance within the corresponding voltage range in the electrolyte system, but these metals are rare metals and relatively expensive. 

Molybdenum foil has better electrochemical performance and chemical stability in aluminum ion batteries compared with other cheap metals such as nickel foil and titanium foil. Therefore, it can better ensure the stable operation of the battery. Studies have shown that nickel foil will have chemical corrosion in the aluminum ion battery system, and unfavorable side reactions will occur at low potentials, and the withstand voltage range is narrow.

Currently, moly foil, tantalum foil, nickel foil and titanium foil are all can be applied in batteries as current collectors. In addition, there is a new metal that was found to be usable as well – tungsten. The tungsten foil used in the batteries has advantages of stable electrochemical performance. 

As a professional manufacturer of tungsten and molybdenum for more than two decades, Chinatungsten Online can supply moly and tungsten foils as well as other finished products. 

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