Battery power and charging. Doc Brown would be so proud.
Eesha Khare won a $50,000 prize for her demo of a supercapacitor (battery) making an LED light up. Her supercapacitor charges in 20 seconds. Imagine having your phone battery completely recharged in a couple of minutes or less.
Her supercapacitor also has 10,000 charge cycles, instead of the usual 1,000. Doing that math, that would mean your phone battery would last 27 years instead of just under 3.
Original Gizmodo story: http://gizmodo.com/this-18-year-olds...-pho-508532491
She explains her project in her wonderfully enthusiastic and rapid-fire way.