New silicon-air battery can supply non-stop power for thousands of hours
31 Oct 2009, 1456 Hrs

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Washington, October 31 Scientists at the Technion-Israel Institute of Technology have developed a new, environmentally friendly silicon-air battery capable of supplying non-stop power for thousands of hours without needing to be replaced.

Created from oxygen and silicon, such batteries would be lightweight, have an unlimited shelf life, and have a high tolerance for both humid and extremely dry conditions.

Potential uses include medical applications (for example, powering diabetic pumps or hearing aids), sensors and icroelectronics structured from silicon.

"Silicon-air batteries will be used like the ones already in use today," said lead researcher Professor Yair Ein-Eli of the Department of Materials Engineering.

"But by using silicon - a safe, non-toxic, stable and more common material - we can create very lightweight batteries with infinite shelf life and high energy capacity," he added.

Silicon-air batteries would provide significant savings in cost and weight because they lack the built-in cathode of conventional batteries.

The cathode in silicon-air (and metal-air) batteries is the oxygen that comes from the atmosphere through the membrane.

Prof. Ein-Eli estimates that in three to four years, silicon-air batteries can be made more powerful, as well as rechargeable.

According to him, in 10 years, it may be possible to build "electric car batteries made from silicon that will turn into and that would be recycled into silicon and then into power again." (ANI)

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