Stationary storage in buildings can help make better use of intermittent renewable power, but safer and cheaper alternatives to lithium-ion batteries are needed to accelerate deployment. Now, demonstration of an aqueous potassium-ion full cell offers a way forward.
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Marbella, L.E. A salty solution for storage. Nat Energy 4, 438–439 (2019). https://doi.org/10.1038/s41560-019-0391-5
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DOI: https://doi.org/10.1038/s41560-019-0391-5
