Comment on New fuel cell could enable electric aviation
CheeseNoodle@lemmy.world 3 days agoiirc the issue with Hydrogen is that it has very high energy/mass but incredibly low density to the point that the fuel tank to contain a reasonable amount of hydrogen (say comparable to hydrocarbons) is even more prohibitive than battery weight.
humanspiral@lemmy.ca 3 days ago
300atm compressed H2 has more energy than batteries. 1500wh/L electric. 2.5kwh/L heat. LH2 is equivalent to 1100atm compressed. LH2 is right for aviation because the tanks are light/simple, and they are filled shortly before takeoff. It’s a big weight savings over kerosene.