Cobalt-impregnated La_(0.75)Sr_(0.25)Cr_(0.5)Mn_(0.5)O_(3-δ) anodes for solid oxide fuel cells

摘要

In this study, we will report our investigation for La_(0.75)Sr_(0.25)Cr_(0.5)Mn_(0.5)O_(3-δ) (LSCrM) based anodes impregnated with solutions of cobalt (Co) nitrate. A YSZ supported SOFC with pure LSCrM anode and La_(0.7)Sr_(0.3)MnO_3 (LSM) cathode exhibits the maximum power density (P_(max)) of 58.7 and 5.2 mW cm~(-2) at 850 ℃ in dry H_2 and dry CH_4. After the modification of anode with Co nitrate, the P_(max) reaches 196.2 mW cm~(-2) in dry H_2 and 28.5 mW cm~(-2) in dry CH_4, about 3.34 times and 5.48 times increase, respectively. These results indicate that Co is also a potential catalyst for LSCrM anode. Moreover, the effect of impregnation amount of catalyst on the cell performance is also evaluated in this study.