Inexpensive new battery generates power with just a drop of saliva

August 10, 2017 by  
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In addition to aiding digestion, it turns out saliva can also power batteries. Researchers at Binghamton University discovered this while inventing a small, paper-based battery that generates energy when mixed with a drop of saliva. The batteries, which are more like tiny microbial fuel cells, are inexpensive to make and could be used in natural disasters and remote settings where on-demand power is hard (if not impossible) to come by. As a result, access to medical care and screenings in rural settings could improve. Binghamton University Electrical and Computer Science Assistant Professor Seokheun Choi spent the past five years developing the micro-power sources. His ultimate goal was to find a way to power medical diagnostic tests in poverty-stricken regions; finally, he succeeded at developing paper-based bacteria -powered batteries “On-demand micro-power generation is required especially for point-of-care diagnostic applications in developing countries,” said Choi. “Typically, those applications require only several tens of microwatt-level power for several minutes, but commercial batteries or other energy harvesting technologies are too expensive and over-qualified. Also, they pose environmental pollution issues.” Related: Indian startup pioneers new battery swapping system for electric buses The batteries contain freeze-dried exoelectrogenic cells which generate power when saliva is added. Astonishingly, with just one drop of spit, the paper batteries can produce enough power for low-power biological sensors in just a matter of minutes. Eureka Alert reports that a benefit of freeze drying the cells is that they can be stored for a long time before use. This means they can be stocked in medical clinics around the world. An additional perk is that the required biological fluid (saliva) can be easily obtained anywhere, anytime. At present, the battery can only produce a few microwatts of power per square centimeter. However, Choi and his research assistant, Maedeh Mohammadifar, are working on boosting the output. In the future, the team hopes to make the paper batteries more robust so they can sustain devices other than LED lights when connected in a series. The paper, “A Papertronic, On-Demand and Disposable Biobattery: Saliva-Activated Electricity Generation from Lyophilized Exoelectrogens Preinoculated on Paper,” was published in Advanced Materials Technologies. + Binghamton University Via Eureka Alert Images via  Binghamton University , Pixabay

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Inexpensive new battery generates power with just a drop of saliva

Veteran Affairs To Compost Food Waste

March 22, 2012 by  
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During war times, the U.S. Department of Veterans Affairs (VA) has a lot on its plate – literally. The department, which provides medical care and financial benefits to veterans and their families, also supplies meals to veterans in need…

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Veteran Affairs To Compost Food Waste

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