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高温材料处理:国际期刊
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN 打印: 1093-3611
ISSN 在线: 1940-4360

高温材料处理:国际期刊

DOI: 10.1615/HighTempMatProc.v11.i1.70
pages 83-94

SYNTHESIS AND PROPERTIES OF NANO-STRUCTURED SOFC ANODE DEPOSITS

Syed Asif Ansar
German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany
Zeynep Ilhan
German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany
Waldemar Richter
German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany

ABSTRACT

Nanostructured YSZ+Ni cermet anode functional layers for SOFC were developed by plasma spraying. Spray processing was optimized by controlling plasma enthalpy and velocity in order to obtain well distributed finely porous nanostructured deposits exhibiting high gas permeability, suitable high temperature electronic conductivity, enhanced triple phase boundaries and catalytic activity. The results were compared with conventional NiO+YSZ and Ni-C+YSZ anodes. YSZ electrolyte layer was deposited onto the anodes for electrochemical testing at 800°C in static conditions. Impedance spectroscopy measurements were performed to collect data on polarization resistance and catalytic behavior of anode layers. It was established that enlarged reaction zone, provided by high specific surface area of nanostructured anodes, and finely porous microstructure, led to lower activation and concentration polarizations and enhanced cell performance by more than 60% compared to conventional cells.