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Composite material brings metal-air batteries a step closer

As a society, we are now heavily dependent on good battery technology. Indeed, as climate change starts to bite and hydrocarbon fuels become more expensive, the demand for better batteries is just going to increase. But the current best technology is simply not going to keep pace. Commercial Lithium ion batteries are approaching their theoretical maximum energy storage density, which is lower than that of gasoline by a factor of about 60-70. In the meantime, we want electric cars like the Tesla—but lighter, with longer range and faster recharging times.

One solution to some of these problems may be metal-air batteries. These batteries have maximum energy densities approaching that of gasoline. Better than that, they should be simpler to construct and could even be made from cheaper materials. In other words, when viewed through rose-tinted glasses, metal-air batteries are better in every way.

The problem is that no one knows how to make one that meets all of these criteria. A group of chemists from Waterloo University in Canada may be heading in the right direction, though.

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from Ars Technica http://arstechnica.com/science/news/2012/04/composite-material-bring-metal-ai...