Scientists create stretchable battery - Indian Express

Scientists have developed a flexible lithium-ion battery that can stretch up to 300 per cent of its original size and still function. Northwestern University's Yonggang Huang and the University of Illinois' John A Rogers have demonstrated the battery that continues to work - powering a commercial light-emitting diode (LED) - even when stretched, folded, twisted and mounted on a human elbow. The flexible battery which can be charged wirelessly is capable of powering innovative stretchable electronics. The implantable electronics can be used anywhere, including inside the human body, scientists say. They could monitor anything from brain waves to heart activity, succeeding where flat, rigid batteries would fail. "We start with a lot of battery components side by side in a very small space, and we connect them with tightly packed, long wavy lines," said Huang. "These wires provide the flexibility. When we stretch the battery, the wavy interconnecting lines unfurl, much like yarn unspooling. And we can stretch the device a great deal and still have a working battery," Huang said in a statement. Huang and Rogers have been working together for the last six years on stretchable electronics, and designing a cordless power supply has been a major challenge. Now they have solved the problem with their clever "space filling technique," which delivers a small, high-powered battery. For their stretchable electronic circuits, the two developed "pop-up" technology that allows circuits to bend, stretch and twist. They created an array of tiny circuit elements connected by metal wire "pop-up bridges". ... contd. Tags: stretchable battery, flexible lithium-ion battery, Scientists, technology news Previous Story India moves to 4th spot R Ashwin reaches career best rankings Reader's Comments | Post a comment via Technology - Google News http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNH8kiKEItuSize9AX_uUGozFpmdyA&url=http://www.indianexpress.com/news/scientists-create-stretchable-battery/1080595/

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