La0.8Ca0.2CoO3-δ陰極含浸Ce0.8Sm0.2O1.9電解質並將其應用於中溫固態氧化物燃料電池

Ce0.8Sm0.2O1.9 - Infiltrated La0.8Ca0.2CoO3-δ Cathodes for Solid Oxide Fuel Cells

歐陽傑(Jie Ouyang) ； 林正雄(Cheng-Hsiung Lin) ； 傅彥培(Yen-Pei Fu)

《臺灣鑛業》 64卷4期 (2012/12) Pp. 52-60

https://doi.org/10.30014/TMI.201212.0007

摘要

本研究比較（1）純電子導體陰極（La0.8Ca0.2CoO3-δ）、（2）混合離子導體的複合式陰極（La0.8Ca0.2CoO3-δ + Ce0.8Sm0.2O1.9） 以及（3）經含浸奈米級Ce0.8Sm0.2O1.9 離子導體於La0.8Ca0.2CoO3-δ 陰極材料（Ce0.8Sm0.2O1.9-infiltrated La0.8Ca0.2CoO3-δ）的電化學差異。從XRD的化學相容性實驗中我們可以發現電解質Ce0.8Sm0.2O1.9與La0.8Ca0.2CoO3-δ陰極之間沒有任何反應產生，由FE-SEM中可以觀察出利用含浸方式Ce0.8Sm0.2O1.9在陰極上析出之晶粒大小大約為100～150 nm，經交流阻抗分析比較後得知，純電子導體、混合離子導體與含浸離子導體，其在800℃時，其極化阻值分別為0.54 Ω cm^2，0.37 Ω cm^2，0.14 Ω cm^2，最後將其組成全電池相互比較，三者互相比較後之結果發現以含浸法將Ce0.8Sm0.2O1.9滲入La0.8Ca0.2CoO3-δ陰極中表現最佳，其在800℃的功率密度為305.42 mW/cm^2。

關鍵字

陰極材料 ； 極化阻值 ； 全電池

並列摘要

In this research, we compared the electrochemical properties of three different kind of cathodes included (1) pure La0.8Ca0.2CoO3-δ, (2) composite La0.8Ca0.2CoO3-δ (La0.8Ca0.2CoO3-δ+Ce0.8Sm0.2O1.9 (SDC), and (3) Ce0.8Sm0.2O1.9-infiltrated La0.8Ca0.2CoO3-δ. There is no interaction between La0.8Ca0.2CoO3-δ and Ce0.8Sm0.2O1.9. Based on the analysis of FE-SEM, it is found that SDC nanoparticles (100~150 nm) formed on porous La0.8Ca0.2CoO3-δ backbone. At operating temperature of 800oC, the polarization resistances of pure La0.8Ca0.2CoO3-δ, composite La0.8Ca0.2CoO3-δ (La0.8Ca0.2CoO3-δ+Ce0.8Sm0.2O1.9), and Ce0.8Sm0.2O1.9-infiltrated La0.8Ca0.2CoO3-δ are 0.54, 0.37, and 0.14 Ω cm^2,respectively. Finally, we assembled anode, electrolyte and cathode to make a single cell and measured current-voltage curve to determine their performances. It is found that the La0.8Ca0.2CoO3-δ cathode infiltrated with SDC showed the maximum power density of 305.42 mW/cm^2 at 800℃.

並列關鍵字

Cathode materials ； Polarization resistance ； Single cell