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Investigation of alternative materials as bifunctional catalysts for electrochemical applications

Michael Vayenas, Christos Vaitsis, Georgia Sourkouni, Pavlos K. Pandis, Christos Argirusis

Abstract


A lab-scale custom made Zinc-Air battery cell was manufactured and tested with a variety of cathode catalysts. MnO2 has been examined both as an Oxygen Reduction Reaction (ORR) and Oxygen Evolution Reaction (OER) catalyst, with more promising results as an ORR catalyst. MnO2 as well as a combination of MnO2 and MWCNTs (MOCN-10) has been examined in this work. In addition, two different Metal Organic Frameworks (MOFs), specifically HKUST-1 and MOF-74, based on Cu and Ni, respectively, were investigated as an alternative and novel cathode catalyst directly on the battery cell. A power output of 20 mW·cm-2 was achieved by using MOCN-10, along with stability in prolonged discharge cycling at 5 mA·cm-2. Furthermore MOF-loaded battery has demonstrated astonishing performance in pulse cycling for more than 120 hours. Moreover no dendrite formation was observed during long term pulse cycling.

Keywords


Rechargeable Zinc-air Battery; ORR; OER; Polarization; Cycling; MOFs

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References


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DOI: https://doi.org/10.15826/chimtech.2019.6.4.01

Copyright (c) 2019 Michael Vayenas, Christos Vaitsis, Georgia Sourkouni, Pavlos K. Pandis, Christos Argirusis

© Chimica Techno Acta, 2014-2020
ISSN 2411-1414 (Online), ISSN 2409-5613 (Print)

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