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Researchers are developing a battery of paper and spit


Newly developed battery is powered by saliva
Researchers have now developed a new powerful battery that is based on paper and powered by saliva. This new battery can be used in extreme conditions, even if normal batteries would no longer work.

Scientists at Binghamton University in the USA developed a battery by combining microbial fuel cells with inactive, freeze-dried cells. After adding saliva, this battery can generate energy. The experts published the results of their study in the journal "Advanced Materials Technologies".

Just a drop of saliva generates energy
The newly developed battery reliably generates energy with just a drop of saliva. This battery can be used by the next generation of so-called Point of Care (POC) diagnostic platforms, the doctors explain.

Saliva is readily available everywhere
The battery has clear advantages over other conventional power-generating solutions because the biological fluid for activating the on-demand battery is readily available even with otherwise limited resources.

Freeze drying enables long-term storage of cells
The use of freeze-drying technology enables cells to be stored for a long time without material deterioration or denaturation, say the experts. A so-called denaturation describes a structural change in biomolecules, which leads to a loss of the biological function of the molecules without changing the primary structure.

The new battery could be used especially in developing countries
On-demand micro-energy generation is particularly necessary for POC diagnostic applications in developing countries, explains author Professor Seokheun Choi from Binghamton University. Typically, these applications require a minimal amount of energy to function for several minutes. However, commercial batteries or other energy technologies are too expensive and overqualified. They also pose a burden on the environment, adds Professor Choi.

Battery performance still needs to be improved
In their further research, the scientists are concentrating on improving the power density of the newly developed battery so that more applications can be supplied with electricity in the future.

16 microbial fuel cells were able to operate an LED diode
A total of 16 microbial fuel cells, which are connected in a row on a single sheet of paper, have generated the desired values ​​of electrical current and voltage to supply an LED diode, say the researchers from the USA. However, an improvement in performance is required for other electronic applications. (as)

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