Journal Article

FZJ-2021-05823

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A rechargeable zinc-air battery based on zinc peroxide chemistry

Sun, W. ; Wang, F. (Corresponding author)FZJ* ; Zhang, B. ; Zhang, M. ; Küpers, V. ; Ji, X. ; Theile, C. ; Bieker, P.FZJ* ; Xu, K. (Corresponding author) ; Wang, C. (Corresponding author) ; Winter, M. (Corresponding author)FZJ*

2021
Moses King Cambridge, Mass.

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Please use a persistent id in citations: doi:10.1126/science.abb9554

Abstract: Rechargeable alkaline zinc-air batteries promise high energy density and safety but suffer from the sluggish 4 electron (e−)/oxygen (O2) chemistry that requires participation of water and from the electrochemical irreversibility originating from parasitic reactions caused by caustic electrolytes and atmospheric carbon dioxide. Here, we report a zinc-O2/zinc peroxide (ZnO2) chemistry that proceeds through a 2e−/O2 process in nonalkaline aqueous electrolytes, which enables highly reversible redox reactions in zinc-air batteries. This ZnO2 chemistry was made possible by a water-poor and zinc ion (Zn2+)–rich inner Helmholtz layer on the air cathode caused by the hydrophobic trifluoromethanesulfonate anions. The nonalkaline zinc-air battery thus constructed not only tolerates stable operations in ambient air but also exhibits substantially better reversibility than its alkaline counterpart.

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Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)

Research Program(s):

1. 1221 - Fundamentals and Materials (POF4-122) (POF4-122)

Appears in the scientific report 2021

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