Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States.
Nano Lett. 2011 Jun 8;11(6):2202-5. doi: 10.1021/nl104417n. Epub 2011 May 12.
Interlayering 17.5 nm of Yttria-doped ceria (YDC) thin films between bulk yttria-stabilized-zirconia electrolyte and a porous Pt cathode enhanced the performance of low-temperature solid oxide fuel cells. The added YDC interlayer (14.11% doped Y(2)O(3)) was fabricated by atomic layer deposition and reduced the cathode/electrolyte interfacial resistances while increasing the exchange current density j(0) by a factor of 4 at operating temperatures between 300-500 °C. Tafel plots and the fitted impedance data suggest that the charge transfer coefficient α of interlayered SOFCs was 1.25 times higher, and the electrode/interfacial activation energy was reduced from 0.85 to 0.76 eV.
在大块氧化钇稳定氧化锆电解质和多孔 Pt 阴极之间交替沉积 17.5nm 的掺钇氧化铈（YDC）薄膜，可提高低温固体氧化物燃料电池的性能。通过原子层沉积法制备的外加 YDC 层（掺杂 14.11%的 Y2O3），降低了阴极/电解质界面电阻，同时在 300-500°C 的工作温度下将交换电流密度 j(0)提高了 4 倍。塔菲尔图和拟合的阻抗数据表明，层状 SOFC 的电荷转移系数 α 提高了 1.25 倍，电极/界面活化能从 0.85eV 降低到 0.76eV。
