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Researchers have made a rechargeable carbon dioxide-consuming battery

Scientists have been trying to make lithium-carbon dioxide batteries for years. The technology promises to pack seven times more energy than lithium-ion batteries. And it provides a way to use carbon dioxide captured from power plant and factory exhaust.

But the chemistry has been thorny and the batteries have suffered from low lifetimes. In fact, exactly one year ago, researchers at MIT reported a practical prototype. It could only be charged 10 times.