Many automotive researchers believe fuel-cell technology will whiz past batteries on the road to a practical electric vehicle. Fuel cells extract electricity from the reaction of hydrogen with oxygen and produce no nasty tailpipe pollution. Researchers at Oak Ridge National Laboratory are solving a problem that has kept fuel cells prohibitively expensive.
Today’s fuel cells typically rely on 200 or so slabs of precisely machined graphite electrodes costing about $10 apiece. Oak Ridge materials scientist Ted Besmann has shown that it is possible to make electrodes out of a carbon-fiber composite that costs about one-fifth as much. Besmann has fabricated 3. 8-centimeter-diameter electrodes from the composite and aims by year’s end to make larger samples for testing by automobile companies.
These materials were meant to revolutionize the solar industry. Why hasn’t it happened?
Perovskites are promising, but real-world conditions have held them back.
Why China is still obsessed with disinfecting everything
Most public health bodies dealing with covid have long since moved on from the idea of surface transmission. China’s didn’t—and that helps it control the narrative about the disease’s origins and danger.
Anti-aging drugs are being tested as a way to treat covid
Drugs that rejuvenate our immune systems and make us biologically younger could help protect us from the disease’s worst effects.
A quick guide to the most important AI law you’ve never heard of
The European Union is planning new legislation aimed at curbing the worst harms associated with artificial intelligence.
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