Journal Article

FZJ-2016-04502

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The Capacitance of Nickel Pattern Electrodes on Zirconia Electrolyte

Doppler, M. C. ; Fleig, J. ; Bram, M.FZJ* ; Opitz, A. K. (Corresponding author)

2016
Electrochemical Soc. Pennington, NJ

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Please use a persistent id in citations: http://hdl.handle.net/2128/12242  doi:10.1149/2.0951610jes

Abstract: Micro-structured thin-film electrodes were employed to investigate the capacitive behavior of nickel on yttria-stabilized zirconia (YSZ) electrolytes by means of electrochemical impedance spectroscopy. Electrodes with different shapes and electrode areas clearly showed a linear relationship between capacitance and the electrode area. Electrostatic double layer models, however, could not explain the observed area specific capacitance value of ca. 3 F/m². This fact, the characteristic voltage dependence with a hysteresis, and the effect of H2S on the electrode capacitance indicate substantial contributions of a chemical capacitance. Possible types of chemical capacitance in the system Ni(H2/H2O)/YSZ are discussed and an oxygen partial pressure dependent mechanism change is suggested.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)

Research Program(s):

1. 135 - Fuel Cells (POF3-135) (POF3-135)
2. SOFC - Solid Oxide Fuel Cell (SOFC-20140602) (SOFC-20140602)

Appears in the scientific report 2016

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Database coverage:
; ; ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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