this post was submitted on 01 Aug 2025
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Futurology

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Form Energy in the US is also developing this technology, though they haven't deployed to the grid yet.

As electricity grids get nearer to being 100% renewables, they need to account for <5% of times both solar & wind don't meet peak electricity demand. Lithium-Ion batteries, which only store electricity for a few hours, aren't much use here, but Iron-Air batteries will be.

They can store days worth of electricity, and not only that, they are stable and non-flammable. The only chemical reaction taking place is iron oxidizing (rusting).

Ore Energy connects world’s first grid-connected iron-air battery in Delft

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[–] neo2478@sh.itjust.works 23 points 1 day ago (1 children)

The technology is awesome but the article is a mess of repetition and disjointed sentences.

I’m not sure if it was written by AI or just an incompetent human.

[–] cron@feddit.org 13 points 1 day ago

Seems like a copy-paste mess:

The company plans to scale to 50 GWh/year by 2030. The company has set an ambitious goal of 50 GWh/year by 2030. To get to this, Yilmaz shared, “First, we need to scale up production rapidly.

Oh right, to scale up you need to scale up first.

[–] Diplomjodler3@lemmy.world 20 points 1 day ago

Whoever wrote this had no fucking idea what they're talking about

[–] Kazumara@discuss.tchncs.de 14 points 1 day ago (1 children)

Where lithium-ion peaks at 4 to 8 hours of storage, Ore Energy’s iron-air battery holds power for 100 hours or more

What?

[–] NotMyOldRedditName@lemmy.world 10 points 1 day ago* (last edited 1 day ago) (1 children)

Ya, that doesn't make a lot of sense... we need more numbers.

A battery might have 100mwh of storage, but only be capable of outputting at 1mw, that's 100 hours.

A different battery might have 1200mwh and can output at 400mw, that's 3 hours.

It's meaningless without the proper numbers.

[–] Kazumara@discuss.tchncs.de 1 points 14 hours ago* (last edited 14 hours ago)

Yeah and a slow peak discharge rate is not really a positive.

We have some LiFePo batteries at work and we simply don't attach the full load they could serve, so they last around 10 hours instead of only 4. Going slower is never an issue I'd say.

Probably the real strengths are in the cost per Joule stored, but they are failing to make their argument properly.

[–] DemBoSain@midwest.social 16 points 1 day ago (1 children)

Are we measuring energy in just hours now?

[–] chickenf622@sh.itjust.works 10 points 1 day ago

I'm assuming they're oversimplifying the unit of maH to just hours, but who knows without a sheet of the specs of one of these batteries.

[–] cron@feddit.org 15 points 1 day ago* (last edited 1 day ago) (3 children)

I find it misleading that they call it "100 hour battery". What's the point?

I'd rather see information about the price per kWh or energy density.

Edit: It even sounds bad, when I think about it now. What would you rather have: A battery that can charge and discharge fast or one that is slow in this matter? If this startup wants to succeed, it needs to beat lithium-based batteries in cost.

[–] Junkers_Klunker@feddit.dk 12 points 1 day ago (1 children)

energy density doesnt matter that much for a landbased stationary battery

[–] cron@feddit.org 3 points 1 day ago (1 children)

You're right. But still, some hard specs would be interesting

[–] Junkers_Klunker@feddit.dk 6 points 1 day ago

Oh absolutely. An article like this useless babble of buzzwords sucks.

[–] rainwall@piefed.social 6 points 1 day ago* (last edited 1 day ago)

Pricing seems to be 10x cheaper than lithium per kWh.

The battery has no rare earth metal in it, just common iron, which dramatically reduces cost. The 100hr storage is also 10-20x what lithium is designed for. Downsides appear to be slow charge/discharge and size of the batteries.

It is most likely a hybrid "iron air for long term storage, lithium for spikes and fluctuations" grid battery makes the most sense. These combo setups wouls likely have drastivally better long term storage and pricing then the current norm of "just Lithium."

There is more info about them in this article about another company in the space called Form energy.

[–] Akasazh@feddit.nl 1 points 1 day ago

Watt hours the point

[–] pyre@lemmy.world 4 points 1 day ago

iron-air

what is this, alchemy?

[–] Taalnazi@lemmy.world 5 points 1 day ago

This is a game-changer.