A rechargeable zinc-air battery based on zinc peroxide chemistry.

Autor: Sun W; MEET Battery Research Center, Institute of Physical Chemistry, University of Münster, Münster, Germany., Wang F; Department of Materials Science, Fudan University, Shanghai, China. martin.winter@uni-muenster.de cswang@umd.edu conrad.k.xu.civ@mail.mil feiw@fudan.edu.cn., Zhang B; School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, China., Zhang M; MEET Battery Research Center, Institute of Physical Chemistry, University of Münster, Münster, Germany., Küpers V; MEET Battery Research Center, Institute of Physical Chemistry, University of Münster, Münster, Germany., Ji X; Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, USA., Theile C; MEET Battery Research Center, Institute of Physical Chemistry, University of Münster, Münster, Germany., Bieker P; MEET Battery Research Center, Institute of Physical Chemistry, University of Münster, Münster, Germany., Xu K; Energy Storage Branch, Biomaterials and Energy Division, Sensor and Electro Devices Directorate, U.S. Army Research Laboratory, Adelphi, MD, USA. martin.winter@uni-muenster.de cswang@umd.edu conrad.k.xu.civ@mail.mil feiw@fudan.edu.cn., Wang C; Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, USA. martin.winter@uni-muenster.de cswang@umd.edu conrad.k.xu.civ@mail.mil feiw@fudan.edu.cn.; Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, USA., Winter M; MEET Battery Research Center, Institute of Physical Chemistry, University of Münster, Münster, Germany. martin.winter@uni-muenster.de cswang@umd.edu conrad.k.xu.civ@mail.mil feiw@fudan.edu.cn.; Helmholtz Institute Münster, IEK-12, Forschungszentrum Jülich GmbH, Münster, Germany.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2021 Jan 01; Vol. 371 (6524), pp. 46-51.
DOI: 10.1126/science.abb9554
Abstrakt: Rechargeable alkaline zinc-air batteries promise high energy density and safety but suffer from the sluggish 4 electron (e - )/oxygen (O 2 ) 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-O 2 /zinc peroxide (ZnO 2 ) chemistry that proceeds through a 2e - /O 2 process in nonalkaline aqueous electrolytes, which enables highly reversible redox reactions in zinc-air batteries. This ZnO 2 chemistry was made possible by a water-poor and zinc ion (Zn 2+ )-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.
(Copyright © 2021, American Association for the Advancement of Science.)
Databáze: MEDLINE
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