Fujifilm developed a resin sheet that generates electricity with the help of the difference between human body temperature and outside air temperature in alliance with the National Institute of Advanced Industrial Science and Technology (AIST). It can be an auxiliary power source of mobile device if it is attached to body or clothes. It can use such power production sources as heat from a TV set, vapor from the bathroom, curtain in the sunshine, and autobody. The company plans to improve performance and durability with a view to putting it into practical application within five years.
The newly-developed sheet uses the thermoelectric effect that temperature difference between front and back lets an electric current flow. In the normal condition, temperature on the surface of human body and clothes is higher than outside air temperature, stable power can be secured. Fujifilm applied electroconductive polymer with which Hideki Shirakawa, professor emeritus of Tsukuba University, won the Noble Prize in Chemistry in 2000. It developed an electroconductive polymer that transmits electricity but does not conduct heat easily using its own original synthesis technology. The sheet is 0.4 mm thick. The generation capacity is currently only several milliwatts per postcard sized sheet. It reckons that the new sheet will be suitable for the power source of a device that monitors cardiac beat and blood pressure round the clock.
Hybrid thermoelectric generator