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by epistasis
1952 days ago
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The previous discussion was of an article of much higher quality: https://news.ycombinator.com/item?id=26159068 This is some sort of development on using magnesium hydride as a storage mechanism for hydrogen. You combine magnesium with hydrogen, get MgH2, and then when MgH2 comes into contact with water, the H2 is released. This is an old idea, and Wikipedia links to a 2006 effort along these lines: https://www.greencarcongress.com/2006/01/safe_hydrogen_r.htm... that achieved a specific energy of 2kWh/kg and 1.5kWh/L. This is about 10x better than lithium ion. However it's about 5x worse than gasoline. But since ICE are horribly inefficient relics of the past, a typical engine is only about 20% efficient, so it cancels out. As for something like flight, jet engines are far more efficient than ICE, so this may or may not work there... |
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