The design provides a pathway to a safe, economical, water-based, flow battery made with Earth-abundant materials. . A new iron-based aqueous flow battery shows promise for grid energy storage applications. A commonplace chemical used in water treatment facilities has been repurposed for large-scale energy storage in a new battery design by researchers at the Department of Energy's Pacific Northwest National. . Iron-flow batteries address these challenges by combining the inherent advantages of redox flow technology with the cost-efficiency of iron.
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