Breakthrough US hydrogen fuel cell promises 200,000-hour life with minimal power loss

Interesting Engineering ^ | April 29, 2025 | Georgina Jedikovska

[FreeReign]

BTW, the answer to my rhetorical question was, “yes”.

[NorthMountain]

Ketjenblack is a electroconductive carbon black with minimum impact on mechanical properties.

Follow the link, you might learn something.

I did ...

[NorthMountain]

Water vapor turns back into a liquid at normal temperatures does it not?

No, it does not.

There is water vapor in the air you're breathing right now ... and you should be grateful for that fact. Absolutely dry air is a bit rough on the lungs.

[FreeReign]

There is water vapor in the air you're breathing right now...

I didn't say that there wasn't water vapor in the air.

There's an entire cycle from evaporation to condensation and precipitation.

[NorthMountain]

So ... you know that there’s water vapor in the air right now ... you probably also know that (unless it’s at 100% relative humidity) it can hold more water than it currently holds. And that is why the water vapor in gasoline engine exhaust doesn’t immediately precipitate.

[FreeReign]

I never said anyting about "immediate" precipitation. All I said is let's not forget about condensation.

The issue is hydrogen fuel cell usage and its effect on the evaporation/condensation and precipitation cycle.

[NorthMountain]

OK ... so if you’re concerned about that you should compare the water vapor output of a hydrogen fuel cell powered vehicle to that of a hydrocarbon internal combustion engine powered vehicle of similar performance.

[Apparatchik]

Thanks - somewhat helpful. I’ll run right out now and get my PhD so I can better understand it. 😂