THE CHARACTERIZATION OF DOPED CEO2 ELECTRODES IN SOLID OXIDE FUEL-CELLS

被引：29

作者：

POUND, BG

机构：

[1] SRI International, Menlo Park, CA 94025

来源：

SOLID STATE IONICS | 1992年 / 52卷 / 1-3期

关键词：

D O I：

10.1016/0167-2738(92)90104-W

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electrochemical impedance spectroscopy was used to examine doped CeO2 as a mixed-conducting electrode material for solid oxide fuel cells. Sintered oxide disks with a composition of Ce0.9M0.1O2 (M = Co, Ni, and Mn) were used at 1000-degrees-C in two types of cell: Pt/Ce0.9M0.1O2/Pt and Ce0.9M).1O2/9% Y2O3-ZrO2/Pt. The impedance spectra for the cell containing two platinum electrodes exhibited three depressed semicircles, with the highest-frequency semicircle corresponding to the bulk oxide. Oxygen reduction on Ni- and Co-CeO2 electrodes in air was studied as a function of voltage using the Y2O3-ZrO2 cell. The spectra in this case exhibited two distinct semicircles, with the high-frequency relaxation being ascribed to O2 reduction at the cathode and the other to mass transport of O2 or O2-.

引用

页码：183 / 188

页数：6

共 6 条

[1]

BADWAL SPS, 1978, AUST J CHEM, V31, P2337, DOI 10.1071/CH9782337

[2] MIXED CONDUCTION AND DEFECT STRUCTURE OF ZRO2-CEO2-Y2O3 SOLID-SOLUTIONS [J].