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A comment on A molten salt storage solution using sodium hydroxide. Parent comment

Re:A molten salt storage solution using sodium hydroxide by KennyBlanken on Thursday December 09, 2021 @08:53PM (#29505572)
Thoughts about the iron flow batteries from ESS? They're using an iron flow chemistry that doesn't require exotic stuff. Looks like they've been testing for a while at a bunch of sites, and brought their first 'real' non-test customer online this fall.

On paper to a layman, they look perfect for at least some applications. Very cheap and easy to build the "stacks", almost completely nontoxic/safe, and relatively easy to scale (I think they don't scale indefinitely with liquid tank size...that the plate surface area also matters?)

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Re:A molten salt storage solution using sodium hydroxide by pjc50 on Friday December 10, 2021 @04:39AM (#29508130)
> scale indefinitely with liquid tank size...that the plate surface area also matters?)

For flow batteries, the plate area controls the charge/discharge rate and the tank size controls the capacity. In theory you can scale the capacity as far as you can build tanks; I don't know whether there are practical considerations of "self-discharge" or electrolyte degradation.

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Re:A molten salt storage solution using sodium hydroxide by KennyBlanken on Friday December 10, 2021 @11:12PM (#29518350)
Not for ESS batteries.

Please do your homework before you speak.

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