The chemistry of the discharge products of metal–oxygen batteries is related to the battery's efficiency but knowledge of their formation mechanism is incomplete. Now, the initial discharge product in sodium–oxygen batteries is shown to be sodium superoxide, which undergoes dissolution and then transforms to sodium peroxide dihydrate.
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Lau, S., Archer, L. Batteries: Discharging the right product. Nat Energy 1, 16019 (2016). https://doi.org/10.1038/nenergy.2016.19
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DOI: https://doi.org/10.1038/nenergy.2016.19