Body Heat Could Charge Your Cellphone

Berkeley (CA) - Remarkable research findings on energy conversion have been published in the most recent edition of Nature: Scientists believe to have discovered a much more efficient way to use silicon to convert heat into electricity - for use in a variety of products ranging from cars to portable electronics.

Imagine a time in which you would not have to plug in your cellphone or iPod over night to recharge the battery. Instead you would power and charge a device simply by wearing it close to your body. The concept of converting waste heat into electricity isn't exactly new, but it never really materialized due to efficiency hurdles. Now, scientists from the U.S. Department of Energy's (DOE) Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California at Berkeley think they may have found a key increase the conversion efficiency by a factor of 100.

The meaning of the discovery will depend on whether these rough nanowires will be efficient enough to make commercial sense. However, if we consider that nearly all of the world's electrical power, approximately 10 trillion Watts, is generated by heat engines, giant gas or steam-powered turbines that convert heat to mechanical energy, we know that much of this heat worth another 15 trillion Watts of electricity is not converted but released into the environment. It doesn't take much to see that there is an enormous potential of increased efficiency in this discovery.

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Wolfgang Gruener
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Wolfgang Gruener is an experienced professional in digital strategy and content, specializing in web strategy, content architecture, user experience, and applying AI in content operations within the insurtech industry. His previous roles include Director, Digital Strategy and Content Experience at American Eagle, Managing Editor at TG Daily, and contributing to publications like Tom's Guide and Tom's Hardware.