| 摘 要： | Symmetrical solid oxide fuel cells(SSOFCs) could be alternative energy conversion devices due to their simple fabrication process and low cost.Herein,perovskite La_(0.6)Ce_(0.1)Sr_(0.3)Fe_(0.95)Ru_(0.05)O_(3-δ)(LCSFR) was synthesized and evaluated as a high-performance electrode for SSOFCs based on the electrolyte of La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3-δ)(LSGM).LCSFR retains their stable perovskite crystal structure in both reducing and oxidizing atmospheres,though a minor amount of LaSrFeO_4 phase is present under reducing conditions.Morphology investigation shows that homogeneously dispersed Ru metallic nanoparticles are exsolved on the surface of LCSFR after being reduced.The polarization resistance(R_p) of LCSFR-CGO(Ce_(0.9)Gd_(0.1)O_(2-δ)) is about 0.11 Ω·cm~2 at 800℃ in air,while the value of R_p for LCSFR-CGO in wet H_2(3% H_2 O) increases up to 0.32 Ω·cm~2.The symmetrical LCSFR-CGOILSGMILCSFR-CGO cell demonstrates a performance with an open circuit potential(OCV) of 1.07 V and a maximum peak power density of 904 mW/cm~2 at 800℃ using wet H_2 as the fuel.This high performance indicates that LCSFR is a candidate electrode for SSOFCs.
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