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A sheath of carbon nanotubes or conductive polymer improves the charge-storage capacity of electrodes.
Alternative approaches replace the battery with compressed air or a flywheel.
Boston Power’s move reflects China’s willingness to provide incentives for companies in strategic industries.
Daniel Yergin’s new book is a valuable guide to how energy drives the world’s economy.
New report suggests an error in estimates of greenhouse gas emissions.
Proton OnSite’s lack of progress toward its proposed “hydrogen highway” demonstrates the low priority America gives this alternative fuel.
By borrowing a trick from optical-fiber technology, a startup makes cells that trap light to create more electricity.
The test of a new lining that can take the heat of fusion could be crucial for a planned reactor in France.
Can a garden hose to the stratosphere really keep the planet cool?
The Web giant reveals its energy use for the first time.