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A 19th-century idea might lead to cleaner cars, larger-scale renewable energy.
Eos Energy Storage says its zinc-air battery can store energy to meet peak power needs for less.
A Pittsburgh company says its battery has the long life and cheap cost needed to be practical for energy storage.
Magnetic-field energy storage could have unique advantages, but scaling up will be a challenge.
New solid-state power-management devices will charge cars fast and make the power grid more flexible and efficient.
An alternative to batteries gets an advance from tiny, crumpled sheets of graphene, whose electrodes can store more charge because they have larger surface areas.
The government funds a factory to make battery materials, but it’s not even clear they’ll be needed.
Portable electronics could run 40 percent longer using a new type of anode.