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A sheath of carbon nanotubes or conductive polymer improves the charge-storage capacity of electrodes.
New energy-storage technology could surpass today’s batteries in capacity and durability.
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.
Battery breakthroughs could lower costs and improve performance for electric vehicles and renewable energy storage–but commercializing these new technologies will be challenging.
New ultracapacitor material could be fabricated directly on chips and solar cells.
A device for power tools may also help regenerative braking.
Digital quantum batteries could exceed lithium-ion performance by orders of magnitude.