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Submission + - Iron-air batteries look promising all of a sudden. And cheap. (gizmag.com)

wonkavader writes: USC researchers have an article in JES on improvements to iron-air batteries. They seemed like a good idea 40 years ago, but were abandoned because hydrolysis cost them 50% of their energy. The researchers have solved the hydrolysis problem. Because iron is incredibly cheap, these batteries could be 25% the cost of lithium-ion batteries per kWh.

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