J0601-1-4 固体酸化物形燃料電池アノードの電気化学的酸化時の劣化挙動(SOFC内の電極近傍現象)

概要

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In order to improve the reliability of the SOFC system, degradation mechanism must be clarified. Although the change of electrode microstructure is one of the main reasons for degradation, quantitative information of microstructure parameters under redox cycle is still limited. Electrochemical oxidation and subsequent reduction are imposed on anode, and performance degradation is evaluated through electrochemical measurements. As a result, polarization resistance increased more than three times, while ohmic resistance showed only slight increase. In addition, the anode microstructures including anode/electrolyte interface with and w/o redox cycle are measured by focused ion beam scanning electron microscopy (FIB-SEM). Then the microstructure parameters are calculated using stereology, which is consistent with the impedance spectroscopy data.
社団法人日本機械学会の論文
2009-09-12