J081022 In-situラマン散乱分光法を用いた作動環境下におけるSOFCの応力状態評価([J08102]燃料電池(2))

概要

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We invented the new evaluation method of stress conditions in operated SOFC. It's based on the observation of lattice conditions by in-situ Raman scattering spectroscopy. The Raman scattering spectra were measured using a Raman system with Ar ion laser (λ=488nm). In order to measure the Raman spectra in operating conditions, we used a glass chamber with an optically transparent window in which temperature and atmosphere can be controlled. We researched how temperature and pressure affects the Raman spectra of 20% Sm-doped ceria (20SDC) which is often used as an interlayer of the SOFC cell. We invented the evaluation method of stress conditions based on the results of these measurements and applied this method to the typical anode supported type cells with 20SDC interlayer. As a result, stress conditions in the electrolyte before operation were evaluated to be compressive. It was kept compressive during temperature rising. The compressive stress is eased with the flow of the fuel and it became stress-free or tensile stress. The tensile stress was enhanced by the re-oxidation, and the destruction of the cell was caused by cooling. Thus, stress conditions of the SOFC cell under the operation was able to be evaluated quantitatively.
一般社団法人日本機械学会の論文
2011-09-11