this post was submitted on 28 Apr 2026
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China develops iron battery 80 times cheaper than lithium that can last 16 years. It provides a budget-friendly, high-endurance answer for the world’s massive energy storage needs. (interestingengineering.com)
submitted 4 days ago by HaraldvonBlauzahn@feddit.org to c/technology@slrpnk.net
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cross-posted from: https://lemmy.ml/post/46526992

https://www.sciencedirect.com/science/article/abs/pii/S2095495622003485

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[–] perestroika@slrpnk.net 3 points 3 days ago* (last edited 3 days ago)

The news: they skipped the vanadium. It's ferrocyanide / ferrogluconate based.

But whoever mentioned the 6000 cycle figure should kindly quote their source, because I can't find it.

Herein, we propose a highly stable alkaline all-iron flow battery for LDES by pairing the [Fe(CN)6]3−/[Fe(CN)6]4− redox couple with the ferric/ferrous-gluconate (Gluc−) complexes redox couple, which exhibits high solubility (1.2 mol L−1), fast redox kinetics and high stability in alkaline media. The high stability of iron-gluconate complexes resulted from the stable six-coordinated iron species, enabling a stable alkaline all-iron flow battery, which can stably run for 950 cycles at a current density of 80 mA cm−2.