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Is this same as rust batteries earlier? https://www.scientificamerican.com/article/rusty-batteries-could-greatly-improve-grid-energy-storage/ https://www.scien

• aDyslecticCrow 2y ago
  I thought the same thing, but no, the chemical process is different. Iron-air batteries are traditional flowcell batteries (with some extra complications). This paper uses hydrogen as an intermediary, which has advantages but also adds some questionable margins in efficiency. But I don't know the efficiency of the suggested iron-air batteries either. This may be nicer if you want hydrogen rather than an electric battery. But if you turn that hydrogen into a fuel cell... the efficiencies of producing and consuming that hydrogen add up.