Battery supply problems faced by electric air taxis

Re:Battery supply problems faced by electric air taxis by myself248 on Wednesday February 05, 2020 @08:53AM (#22246673)

I keep being intrigued by vanadium redox flow batteries, and I've seen some in the real world in stationary applications. And the prospect of instant charging by spit-swapping in a mobile application is pretty wild.

How scarce is vanadium, though?

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Re:Battery supply problems faced by electric air taxis by marcosdumay on Wednesday February 05, 2020 @10:22AM (#22247456)

Vanadium has an horrible weigh/charge ratio. That's why it's used in stationary applications.

Sodium redox flow batteries are all the hype nowadays, because sodium is much cheaper, sulfur for the oxydizer is also very cheap, weight/charge is very high, and volume/charge (important for stationary applications) is also much higher. But I think it's stuck in a patent minefield.

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Re:Battery supply problems faced by electric air taxis by selectodude on Wednesday February 05, 2020 @09:26AM (#22246885)

It’s like 2 percent by mass of spent iron slag.

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Re:Battery supply problems faced by electric air taxis by detritus on Wednesday February 05, 2020 @09:34AM (#22246949)

Now now, no need to be rude.

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