Charge your phone just by moving your body

A new technology that can generate electricity from vibrations or even small body movements means you could charge your laptop by typing or power your smartphone's battery on your morning run.

Researchers at the University of Waterloo have developed a tiny, wearable generator in response to the urgent need for sustainable, clean energy. It is also scalable for larger machines.

"This is a real game changer," said Dr. Asif Khan, the project's lead researcher and a postdoctoral fellow in the Department of Electrical and Computer Engineering at Waterloo. "We have made the first device of its kind that can power electronics at low cost and with unprecedented efficiency."

The device uses the piezoelectric effect, which generates electrical energy by applying pressure to materials like crystal and certain ceramics. Piezoelectric materials are currently used in various sensing technologies including sonar, ultrasonic imaging and microwave devices.

The new generator contains materials that are flexible, energy-efficient and relatively less expensive. (University of Waterloo)

"Those older materials are brittle, expensive and have a limited ability to generate electricity," said Dr. Dayan Ban, professor and researcher at the Waterloo Institute for Nanotechnology. "The materials we've created for the new generator are flexible, more energy-efficient and cost less."

In addition to Khan and Ban, the research team includes two other Waterloo professors, one professor from the University of Toronto, and their research groups.

The researchers have filed a patent and are working with a Canadian company to commercialize their generator for use in aviation, specifically to power the systems on planes that monitor the status of safety equipment.

The paper, "Breaking Dielectric Dilemma: Polymer Functionalized Perovskite Piezocomposite with Large Current Density Output," appears in the November edition of Nature Communications.