Bio-Batteries Breathe Oxygen
An air-breathing bio-battery has been constructed by researchers from the Institute of Physical Chemistry of the Polish Academy of Sciences. The core element providing the new power source with relatively high voltage and a long lifetime is a carefully designed cathode that takes up oxygen from air and is composed of an enzyme, carbon nanotubes and silicate.
People are increasingly taking advantage of devices supporting various functions of our bodies. Today they include cardiac pacemakers or hearing aids; tomorrow it will be contact lenses with automatically changing focal length or computer-controlled displays generating images directly in the eye. None of these devices will work if not coupled to an efficient and long-lasting power supply source. The best solution seems to be miniaturized biofuel cells consuming substances naturally occurring in human body or in its direct surrounding.
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