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Sales of electric vehicles (EVs) nearly doubled in 2013, but most won't take you farther than 100 miles on one charge. To boost their range toward a tantalizing 300 miles or more, researchers are reporting new progress on a "breathing" battery that has the potential to one day replace the lithium-ion technology of today's EVs. They presented their work at the 247th National Meeting & Exposition of the American Chemical Society (ACS) in Dallas this week.

"Lithium-air batteries are lightweight and deliver a large amount of electric energy," said Nobuyuki Imanishi, Ph.D. "Many people expect them to one day be used in electric vehicles."

The main difference between lithium-ion and lithium-air batteries is that the latter replaces the traditional cathode -- a key battery component involved in the flow of electric current -- with air. That makes the rechargeable metal-air battery lighter with the potential to pack in more energy than its commercial counterpart.

While lithium-air batteries have been touted as an exciting technology to watch, they still have some kinks that need to be worked out. Researchers are forging ahead on multiple fronts to get the batteries in top form before they debut under the hood.

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