title: Reverse electrowetting as a new approach to high-power energy harvesting.
abstract: Over the last decade electrical batteries have emerged as a critical bottleneck for portable electronics development. High-power mechanical energy harvesting can potentially provide a valuable alternative to the use of batteries, but, until now, a suitable mechanical-to-electrical energy conversion technology did not exist. Here we describe a novel mechanical-to-electrical energy conversion method based on the reverse electrowetting phenomenon. Electrical energy generation is achieved through the interaction of arrays of moving microscopic liquid droplets with novel nanometer-thick multilayer dielectric films. Advantages of this process include the production of high power densities, up to 10(3) W m(-2); the ability to directly utilize a very broad range of mechanical forces and displacements; and the ability to directly output a broad range of currents and voltages, from several volts to tens of volts. These advantages make this method uniquely suited for high-power energy harvesting from a wide variety of environmental mechanical energy sources.
authors.affiliation: InStep NanoPower, LLC, Madison, Wisconsin 53705, USA. tnk@engr.wisc.edu
authors.forename: Tom
authors.initials: T
authors.lastname: Krupenkin
authors.forename: J Ashley
authors.initials: JA
authors.lastname: Taylor