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Researchers are able to operate it at room temperature for the first time

Researchers are able to operate it at room temperature for the first time

Modern batteries are usually based on lithium-ion or lithium-polymer cells, but they have been criticized, especially for their resource consumption. Lithium mining is problematic, and moreover, the material is only available to a limited extent. This is why many alternative technologies have been researched for years, for example based on more common substances such as sodium or calcium. It seems that there is now a breakthrough from China in the latest technology.

At room temperature – and flexible

It appears that researchers at Fudan University in Shanghai have succeeded there in operating calcium air cells at room temperature. Until now, this has required temperatures in excess of 75°C, which has severely limited possible applications. With the new structure reached by researchers in… Nature paper (Paywall), this problem can be solved. Obviously the decisive factor here is the electrolyte developed specifically for this purpose. This is located between the calcium-coated fibers and a surrounding network of carbon nanotubes.

Thanks to this structure, the calcium-air battery can withstand 700 charging cycles. Meanwhile, there is talk of a storage capacity of 500 mAh per gram, about one and a half times that of lithium-ion cells. In addition, cells built in this way should be highly flexible and could even be woven into fabrics to power wearable devices, for example. high Physicist However, at least 1,500 charging cycles will be necessary for it to be ready for series production. The development of calcium-air batteries is not over yet.

suitable for: Chinese developers are working on batteries that are supposed to last for 50 years

In addition, failure of mass production of the new approach cannot be ruled out due to other problems – for example costs or lack of scalability. In this case too, the research work presented can of course help in further development and perhaps make it possible in the future for calcium-based batteries to become a reasonable alternative to lithium cells, at least in some areas.

Source: via T3N / Physicist