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Author Topic: Batteries: Today's Energy Solution  (Read 183186 times)

SteveMDFP

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Re: Batteries: Today's Energy Solution
« Reply #1100 on: May 14, 2019, 08:11:03 PM »
Re Zhang battery in seawater

Upon reflection, i think if this is done at scale in the ocean, that Prussian Blue electrode had better be very, very stable. Square kilometers of electrode shedding cyanide complexes into the sea is not nice.

sidd

Toxicologically, this seems unlikely to be a problem to me.  Although the cyanide ion is notoriously toxic, prussian blue has the cyanide complexed to iron quite tightly.  In this form, it is even administered as a medication.  It's the strong reactivity of cyanide that makes it both toxic on its own, and readily inactivated by metals.  See:
https://en.wikipedia.org/wiki/Prussian_blue

and

https://en.wikipedia.org/wiki/Cyanide_poisoning

"In medicine, orally administered Prussian blue is used as an antidote for certain kinds of heavy metal poisoning"