Elon Musk Challengers Jostle to Solve Riddle of Energy Storage
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There’s a crowded field of companies jostling Elon Musk for the most innovative breakthrough solution to his challenge to “fundamentally change the way the world uses energy.”
While the chairman of Tesla Motors Inc. re-purposes the lithium-ion batteries that power his cars for use in homes and businesses, others are working on more radical approaches to the riddle of energy storage -- using everything from vats of molten salt to rooftop tanks filled with ice.