Boston's Form Energy says its iron-air battery systems will provide hundred hour-plus grid-scale energy storage at a tenth the price of lithium "big battery" installations

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Form Energy iron-air battery

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Boston's Form Energy says its iron-air battery systems will provide hundred hour-plus grid-scale energy storage at a tenth the price of lithium "big battery" installations (Form Energy)

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The charge cycle turns rust into metallic iron, storing energy and releasing oxygen. The discharge cycle accepts oxygen and produces energy and rust (Form Energy)