Screening and further investigations on promising bi-functional catalysts for metal–air batteries with an aqueous alkaline electrolyte

  • A wide range catalyst screening with noble metal and oxide catalysts for a metal–air battery with an aqueous alkaline electrolyte was carried out. Suitable catalysts reduce overpotentials during the charge and discharge process, and therefore improve the round-trip efficiency of the battery. In this case, the electrodes will be used as optimized cathodes for a future lithium–air battery with anA wide range catalyst screening with noble metal and oxide catalysts for a metal–air battery with an aqueous alkaline electrolyte was carried out. Suitable catalysts reduce overpotentials during the charge and discharge process, and therefore improve the round-trip efficiency of the battery. In this case, the electrodes will be used as optimized cathodes for a future lithium–air battery with an aqueous alkaline electrolyte. Oxide catalysts were synthesized via atmospheric plasma spraying. The screening showed that IrO2, RuO2, La0.6Ca0.4Co3, Mn3O4, and Co3O4 are promising bi-functional catalysts. Considering the high price for the noble metal catalysts further investigations of the oxide catalysts were carried out to analyze their electrochemical behavior at varied temperatures, molarities, and in case of La1−x Ca x CoO3 a varying calcium content. Additionally all catalysts were tested in a longterm test to proof cyclability at varied molarities. Further investigations showed that Co3O4 seems to be the most promising bi-functional catalyst of the tested oxide catalysts. Furthermore, it was shown that a calcium content of x = 0.4 in LCCO has the best performance.show moreshow less

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Metadaten
Author:Dennis Wittmaier, Timo Danner, Norbert Wagner, Kaspar Andreas Friedrich
Publisher:Springer Netherlands
Year of Publication:2014
Language:English
GND Keyword:Batterie; Elektrolyt; Katalyse
Parent Title (English):Journal of Applied Electrochemistry
Volume:44
Issue:1
ISSN:0021-891X
First Page:73
Last Page:85
Document Type:Article (reviewed)
Institutes:Hochschule Offenburg / Bibliografie
Acces Right:Zugriffsbeschränkt
Release Date:2019/10/31
Licence (German):License LogoEs gilt das UrhG
DOI:https://doi.org/10.1007/s10800-013-0602-x