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Charge mobile with T-shirt

BBC Online
Scientists at the University of South Carolina have found a way to use a cheap T-shirt to store electrical power.
It could pave the way for clothes that are able to charge phones and other devices.
Experts predict that new technologies including roll-up smartphones and laptops will be on the market soon.
These developments would spur on the need for "flexible energy storage", said the professor behind the project.
Xiaodong Li, a professor of mechanical engineering at the university, teamed up with post-doctorate researcher Lihong Bao to find a solution.
Charge mobile
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They used a T-shirt bought from a local discount store, which was soaked in a solution of fluoride, dried and then baked in an oxy gen-free environment at high temperature.
The fibres in the fabric converted from cellulose to activated carbon during the process, but the material remained flexible.
By using small parts of the fabric as an electrode, die researchers showed dial the material could be made to act as a capacitor.
Capacitors store an electrical charge and are components of nearly every electronic device on the market.
By coating the individual fibres of die carbonised fabric widi manganese oxide just a nanometre thick, die electrode performance of the fabric was further enhanced.
"Tliis created a stable, high-performing supercapacitor," said Prof Li.
The hybrid superca pacitors proved resilient -even after thousands of charge-discharge cycles their performance did not diminish more than 5%, the researchers said.
"By stacking these supercapacitors up, we should be able to charge portable electronic devices such as cell pho nes," Pro fLi said.
"We wear fabric every' day. One day our cotton T-shirts could have more functions; for example, a flexible energy storage device that could charge your cell phone or your iPad," Prof Li added.
The researchers wrote up their findings for the