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Bifunctional electrodes for unitised regenerative fuel cells

Altmann, Sebastian and Kaz, Till and Friedrich, K. Andreas (2011) Bifunctional electrodes for unitised regenerative fuel cells. Electrochimica Acta, 56, pp. 4287-4293. Elsevier. doi: 10.1016/j.electacta.2011.01.077.


Official URL: http://www.elsevier.com/locate/electacta


The effects of different configurations and compositions of platinum and iridium oxide electrodes for the oxygen reaction of unitised regenerative fuel cells (URFC) are reported. Bifunctional oxygen electrodes are important for URFC development because favourable properties for the fuel cell and the electrolysis modes must be combined into a single electrode. The bifunctional electrodes were studied under different combinations of catalyst mixtures, multilayer arrangements and segmented configurations with single catalyst areas. Distinct electrochemical behaviour was observed for both modes and can be explained on the basis of impedance spectroscopy. The mixture of both catalysts performs best for the present stage of electrode development. Also, the multilayer electrodes yielded good results with the potential for optimisation. The influence of ionic and electronic resistances on the relative performance is demonstrated. However, penalties due to cross currents in the heterogeneous electrodes were identified and explained by comparing the performance curves with electrodes composed of a single catalyst. Potential improvements for the different compositions are discussed.

Item URL in elib:https://elib.dlr.de/71406/
Document Type:Article
Title:Bifunctional electrodes for unitised regenerative fuel cells
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Altmann, Sebastiansebastiasn.altmann (at) airbus.comUNSPECIFIED
Kaz, Tilltill.kaz (at) dlr.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:January 2011
Journal or Publication Title:Electrochimica Acta
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.electacta.2011.01.077
Page Range:pp. 4287-4293
Keywords:reversible fuel cell
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E EV - Energy process technology (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Elektrochemische Prozesse (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Friedrich, Prof.Dr. Kaspar Andreas
Deposited On:08 Nov 2011 11:16
Last Modified:06 Sep 2019 15:16

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