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Suppressing corrosion in primary aluminum–air batteries via oil displacement

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Science  09 Nov 2018:
Vol. 362, Issue 6415, pp. 658-661
DOI: 10.1126/science.aat9149

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Oil when not in use

For primary or nonrechargeable batteries, the overall energy density will be limited by any discharge or open-circuit corrosion that occurs during storage. For batteries based on aluminum and air, this longstanding problem has prevented their widespread use and has been challenging to overcome. Hopkins et al. used commercially available components to construct aluminum-air batteries. During standby periods, the electrolyte in the batteries was replaced with oil to protect the electrodes from corrosion, thus preventing energy loss.

Science, this issue p. 658