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Iron-air batteries have a “reversible rust” cycle that could store and discharge energy for far longer and at less cost than lithium-ion technology
![Rusty Batteries Could Greatly Improve Grid Energy Storage](https://static.scientificamerican.com/sciam/cache/file/2FDC68E1-514E-480F-AE4C5C17B4484D51_source.jpg?w=590&h=800&1C61893E-C208-414A-89003C1F6E7843B4)
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ABOUT THE AUTHOR(S)
John Fialka is a reporter with E&E News.