Abstract
Stress in an anode-supported type solid oxide fuel cell (SOFC) was measured by in-situ measurement using micro Raman scattering spectroscopy. The stress conditions evaluation method focuses on Raman spectra of samarium-doped ceria (SDC) which was used as an interlayer in SOFC. The shift of ceria Raman peak and peak width in SDC interlayer were measured to evaluate stress, temperature, and Sm concentration. We performed this method in the purchased cells of conventional anode-supported type SOFC under thermal cycles, which simulate start-up and shout down. Observed results suggested that not only thermal stress relaxation but also diffusion of samarium from an interlayer to an electrolyte, and stress relaxation by plastically deformation were occurred.
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