SEOUL -- Samsung Electronics is developing technology that could give electric-vehicle batteries almost double the capacity of today's mainstream lithium-ion power packs, looking to get a step ahead of Toyota Motor's competing tech.
The South Korean icon is working on a breakthrough in lithium-air cells, regarded in the industry as the holy grail. Samsung's central research lab recently produced a lithium-air battery with a capacity of 520 watt-hours per kilogram.
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