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submitted 1 year ago by L4s@lemmy.world to c/technology@lemmy.world

Tesla owners are overwhelmingly men, and the most common occupations are engineer, software engineer, and manager of operations, one study found.

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[-] Hypx@kbin.social -1 points 1 year ago

Except those fundamental limits are far higher. The fact is that hydrogen stores energy at 120 MJ/kg. Even at 5% weight efficiency, that's 6 MJ/kg. Or 1,666 Wh/kg. At 10%, it is 3,333 Wh/kg. Far beyond any battery.

Your link is seriously lying. 8x is the gap between lead-acid and li-ion batteries. The claims are simply impossible. The author must be unknowingly comparing lead-acid battery powered cars to li-ion battery powered cars. I cannot see any other way his claim is true.

A lithium-air battery is literally a fuel cell. In fact, what did you think hydrogen fuel cells were this entire time?

[-] Hobovision@kbin.social 0 points 1 year ago

On one had we've got links to the department of energy and to Wikipedia. And just some hand waving on the other hand.

[-] Hypx@kbin.social 0 points 1 year ago

It's wrong because li-ion batteries at the time were way better than what it claims:

https://news.panasonic.com/global/press/en091218-2

This is from 2009, and already we reached 675 Wh/L. So there's no way the DoE link is true.

[-] lone_faerie@kbin.social 0 points 1 year ago

Driving with something that power dense is incredibly dangerous. You're literally driving a bomb, dynamite is 4.6 MJ/kg

this post was submitted on 03 Jul 2023
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