Paper Battery Powered by Bacteria – Jherrielloyd Yao
A team of scientists at Binghamton University has developed a disposable paper battery that uses bacteria as an energy source and requires ordinary water to activate it..
To create a device, cellulose fibers are impregnated with special chemical reagents and shaped. Next, the surface of the paper with a thin layer of metal and other materials is coated with special bacteria that are capable of generating and transmitting electrons. When particles pass through their cell membranes and contact with anodes, electricity is generated on the surface..
The bacteria are initially inactive, but the water reanimates them. After the energy potential is exhausted, nature itself begins to decompose the battery. An additional advantage is that such material can be freely folded and folded for serial or parallel connection..
The capacity of the existing version of the battery is 4 μW / sq. cm, but the team plans to increase this figure by at least 1000 times, making it commercially viable. Work is also underway to remove more effective types of microorganisms..
Scientists believe that their invention will find many applications, especially in IoT devices. Although lithium-ion batteries and supercapacitors can successfully deliver energy, they are composed of materials that are not biodegradable and sometimes toxic, leading to disposal problems..
Another amazing development was presented by the Israeli company SolCold. It creates a unique material that, after being applied to a surface, cools the object under the influence of only sunlight..
text: Ivan Malichenko, photo and video: Binghamton University
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