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A high-power circuit breaker makes it possible to create highly efficient DC power grids.
Sun Catalytix is making a new type of flow battery that could store hours’ worth of energy on the grid.
SolidEnergy says its new battery materials store more energy and won’t catch fire.
Germany has decided to pursue ambitious greenhouse-gas reductions—while closing down its nuclear plants. Can a heavily industrialized country power its economy with wind turbines and solar panels?
An Icelandic company figures out how to make methanol from waste carbon dioxide, but the economics may not work without a nearby volcano.
A startup says its technical advances could make fuel cells as cheap as grid power.
Millions of the world’s poorest lack power. Microgrids could be a clean-energy solution.
A cheaper fuel cell could provide affordable power for microgrids.
Composite and 3-D-printed components will mean jet engines that use 15 percent less fuel.