time or the lifetime of the battery. It’s also bulky. Carmakers have to leave drivers room for their passengers plus some trunk space. To make electric vehicles competitive with, or better than,
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, vehicles run by internal-combustion engines,
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, manufacturers will need low-cost,
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, high-energy batteries that last up to 15 years. Likewise,
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, grid batteries need to store energy for later use at low cost, and stand up to decades of use.
“There’s no one battery that’s going to meet all our needs,” says MIT materials scientist Yet-Ming Chiang. Batteries needed for portable devices are very different from those needed for transportation or grid-scale storage. Expect to see a variety of new battery types,
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, each designed for a specific application.
Switching to sulfur
For electric vehicles,
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, lithium-sulfur batteries are the next great hope. The cathode is made mainly of sulfur,
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, an industrial waste product that is cheap,
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, abundant and environmentally friendly. The anode is made of lithium metal.

Battery: Lithium-sulfur


How it works: Lithium ions from the anode react with sulfur held in the cathode to produce electric current



What it’s used for: Cars, cell

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