【摘要】：采用檸檬酸-硝酸鹽燃燒法制備PrBaFe_2O_(5+δ)(PBFO)和PrBaFe_(1.6)Ni_(0.4)O_(5+δ)(PBFNO)電極材料,用高溫固相法制備La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3 δ)(LSGM)電解質(zhì)。以LSGM為電解質(zhì),PBFNO及PBFNO-SDC分別為對稱電極制備單電池。利用X射線衍射法研究材料的物相結(jié)構(gòu),交流阻抗法記錄界面極化行為,掃描電子顯微鏡觀察電池的斷面微結(jié)構(gòu),用自組裝的測試系統(tǒng)評價電池輸出性能。結(jié)果表明:合成的PBFO和PBFNO粉體呈現(xiàn)單一的鈣鈦礦結(jié)構(gòu);Ni摻雜能夠明顯改善空氣氣氛下的界面極化行為,800℃時電極 電解質(zhì)的界面極化阻抗由1.94?·cm~2降低到0.39?·cm~2。通過PBFNO與SDC復(fù)合能夠明顯增大電極的三相反應(yīng)界面,提高電池輸出性能,單電池在800℃時的最大功率輸出密度從332mW/cm~2增大到372mW/cm~2。PBFNO-SDC復(fù)合電極是潛在的對稱固體氧化物燃料電池電極材料。
[Abstract]:PrBaFe2O5 未) (PBFO) and PrBaFe1.6 Ni0.4 O5 未) (PBFNO) electrode materials were prepared by citrate-nitrate combustion method, and La0.9 Sr0.1 Ga0.8 Mg0.2O3 未) (LSGM) electrolytes were prepared by high temperature solid state method. Single cell was prepared by using LSGM as electrolyte and PBFNO-SDC as symmetric electrode. The phase structure of the material was studied by X-ray diffraction, the polarization behavior of the interface was recorded by AC impedance method, the cross-section microstructure of the battery was observed by scanning electron microscope, and the output performance of the battery was evaluated by a self-assembled test system. The results show that the interfacial polarization behavior of the synthesized PBFO and PBFNO powders with a single perovskite structure can be obviously improved at 800 鈩，

本文編號：2189011