原位析出法制备CoCu纳米颗粒均匀修饰PrSr(CoCu)0.2Mn0.8O4-δ陶瓷阳极材料

In-situ fabrication of CoCu alloy nanoparticles decorated PrSr(CoCu)0.2Mn0.8O4-δ Ceramic Anode Materials

摘要:

利用原位析法制备出CoCu合金（CCA）纳米颗粒均匀包覆的Ruddlesden?Popper（RP）型层状钙钛矿PrSr(CoCu)0.2Mn0.8O4-δ（RP-PSCCM）材料，通过XRD和SEM两种表征方法证明该阳极的晶体结构和表面析出的颗粒情况．RP-PSCCM-CCA阳极材料的电导率、对称电池的极化阻抗及单电池的性能等测试结果表明，RP-PSCCM-CCA具有优异的催化活性．RP-PSCCM-CCA阳极材料拥有较低的活化能，在800 ℃时电导率达到0.55 S/cm，优于传统的钙钛矿阳极．在800 ?C下的H2气氛中，RP-PSCCM-CCA-GDC/LSGM/RP-PSCCM-CCA-GDC对称电池的极化阻抗达到0.125 Ω?cm2，而RP-PSCCM-CCA-GDC/LSGM/LSCF-GDC单电池的最大功率密度也达到了696 mW/cm2，远超过其他的钙钛矿阳极，特别是Cu基阳极材料．以C3H8为燃料时，单电池有着稳定的功率输出，表明RP-PSCCM-CCA是一种优异的抗积碳陶瓷阳极材料．

Abstract:

In this paper, CoCu alloy (CCA) nanoparticles decorated ruddlesden-popper (RP) type layered perovskite PrSr(CoCu)0.2Mn0.8O4-δ（RP-PSCCM） ceramic anode has been in-situ reduction method. Crystal structure and morphology of the precipitated nanoparticles on the surface of the anode were confirmed by XRD and SEM. Conductivity of RP-PSCCM-CCA, polarization impedance of symmetric cell with RP-PSCCM-CCA anode in H2 have been studied, the results indicate that RP-PSCCM-CCA shows a good catalytic activity. Moreover, the RP-PSCCM-CCA-GDC/LSGM/LSCF-GDC single cell exhibits a maximum power density of 696 mW/cm2 at 800 ℃, and excellent coking resistance in C3H8. Overall, RP-PSCCM-CCA has been demonstrated as promising anode materials for SOFCs.