%0 Journal Article
%A Doppler, M. C.
%A Fleig, J.
%A Bram, M.
%A Opitz, A. K.
%T The Capacitance of Nickel Pattern Electrodes on Zirconia Electrolyte
%J Journal of the Electrochemical Society
%V 163
%N 10
%@ 1945-7111
%C Pennington, NJ
%I Electrochemical Soc.
%M FZJ-2016-04502
%P H1019 - H1025
%D 2016
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000389150900121
%R 10.1149/2.0951610jes
%U https://juser.fz-juelich.de/record/817904