Power Felt

Scientists at the Center for Nanotechnology and Molecular Materials at Wake Forest University have developed a thermoelectric fabric that converts body heat into electricity. The material is made of layers of interlocking carbon nanotubes and plastic fibers, and feels similar to felt. The thermoelectric technology develops electric current from temperature differences, such as the difference between anatomical temperature and room temperature.

According to Wake Forest researcher Corey Hewitt, “We waste a lot of energy in the form of heat. For example, recapturing a car’s energy waste could help improve fuel mileage and power the radio, air conditioning or navigation system. Generally thermoelectrics are an underdeveloped technology for harvesting energy, yet there is so much opportunity.”

The first prototypes of Power Felt yielded 140 nanowatts of power from 72 layers of nanofabric, and the researchers are currently attempting to increase the output of the technology.

“I imagine being able to make a jacket with a completely thermoelectric inside liner that gathers warmth from body heat, while the exterior remains cold from the outside temperature,” says Hewitt. “If the Power Felt is efficient enough, you could potentially power an iPod, which would be great for distance runners. It’s definitely within reach.”

Contact: Wake Forest University, Winston-Salem, NC, USA.