Operando XAS of a Bifunctional Gas Diffusion Electrode for Zn-Air Batteries under Realistic Application Conditions
Source abstract
Abstract
In this study, operando X-ray absorption spectroscopy (XAS) measurements were carried out on a newly developed O2 bi-functional gas diffusion electrode (GDE) for rechargeable Zn-air batteries, consisting of a mixture of α-MnO2 and carbon black. The architecture and composition of the GDE, as well as the electrochemical cell, were designed to achieve optimum edge-jumps and signal-to-noise ratio in the absorption spectra for the Mn K-edge at current densities that are relevant for practical conditions. Herein, we reported the chemical changes that occur on the MnO2 component when the GDE is tested under normal operating conditions, during both battery discharge (ORR) and charge (OER), on the background of more critical conditions that simulate oxygen starvation in a flooded electrode.
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Research context
OpenAlex topics: Advanced battery technologies research · Electrocatalysts for Energy Conversion · Catalytic Processes in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), Helmholtzstraße 8, 89081 Ulm, Germany
Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14-km 163.5 in Area Science Park, 34149 Basovizza, Italy
Department of Innovation Engineering, University of Salento, Via Monteroni, 73100 Lecce, Italy
Department of Energy, Politecnico di Milano, Via Lambruschini 4, 20156 Milano, Italy
References (19)
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