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She won the $50,000 Intel Foundation Young Scientist Award

A high school student from California has created a way to charge cell phones completely in just 20-30 seconds. 

Eesha Khare, 18, of Saratoga, California, recently won the $50,000 Intel Foundation Young Scientist Award for her fast-charging device. 

The device uses an improved supercapacitor that can store a lot of energy into a small space using a nanorod electrode. It is capable of 10,000 charge-recharge cycles and can fully charge a cell phone in 20-30 seconds. 

Traditional chargers typically take hours to achieve a full charge, and are capable of only 1,000 cycles for rechargeable batteries.

Khare said her supercapacitor has been used to power an LED, and sees her invention being placed in cell phones in the future.

"It is also flexible, so it can be used in rollup displays and clothing and fabric," Khare said. "It has a lot of different applications and advantages over batteries in that sense."

This definitely isn't the first time a high school student has come up with a brilliant invention in recent years. Just last year, 15-year-old Jack Andraka invented a new pancreatic cancer test that earned him the $75,000 prize from another Intel-sponsored fair. 

Source: NBC News

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RE: Paper
By EricMartello on 5/20/2013 11:24:53 PM , Rating: 2
A button cell is hardly niche, there's billions of them made each year. They're just tailored to a different market, low self discharge and high capacity in a small size without a need for much current draw.

What I meant by niche is that coin cells are not a common type. They're used in motherboards, clocks and compact devices that require something to preserve backup memory or whatever. Often they're installed by the factory and the consumer never worries about it until it dies, which can be years. A typical battery-powered device is going to use AA or AAA type batteries...but anyway I know what you were saying.

1C isn't some magic number, it's just that rather than choose to list energy storage in joules or some other unit, they settled on Ah. That many batteries can be charged in an hour or less doesn't grant some special physical significance to 1C.

EXACTLY! It is nothing special which is why I made my original statement in response to another poster's comment claiming that there was some wide discrepancy as to the typical charge/discharge rate for a battery.

The C in 1C refers to the capacity of a given battery in amp-hours, so 1C means 1 times capacity rating. You could have any number there to describe a particular charge or discharge current.

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