TY  - JOUR
AU  - Doppler, M. C.
AU  - Fleig, J.
AU  - Bram, M.
AU  - Opitz, A. K.
TI  - The Capacitance of Nickel Pattern Electrodes on Zirconia Electrolyte
JO  - Journal of the Electrochemical Society
VL  - 163
IS  - 10
SN  - 1945-7111
CY  - Pennington, NJ
PB  - Electrochemical Soc.
M1  - FZJ-2016-04502
SP  - H1019 - H1025
PY  - 2016
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000389150900121
DO  - DOI:10.1149/2.0951610jes
UR  - https://juser.fz-juelich.de/record/817904
ER  -