Effect of impurities on structural and electrochemical properties of the Ni-YSZ interface

被引：80

作者：

Jensen, KV

Wallenberg, R

Chorkendorff, I

Mogensen, M

机构：

[1] Riso Natl Lab, Mat Res Dept, DK-4000 Roskilde, Denmark

[2] Tech Univ Denmark, ICAT, Dept Phys, DK-2800 Lyngby, Denmark

[3] Tech Univ Denmark, ICAT, Dept Chem Engn, DK-2800 Lyngby, Denmark

[4] Lund Univ, Ctr Chem & Chem Engn, S-22100 Lund, Sweden

来源：

SOLID STATE IONICS | 2003年 / 160卷 / 1-2期

关键词：

SOFC; anode; Ni-YSZ interface; foreign phases; polarisation resistance;

D O I：

10.1016/S0167-2738(03)00147-4

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：

The changes in interface structure and chemical composition of a 99.995% pure nickel/yttria-stabilised zirconia (YSZ) interface were examined after heat treatment at 1000degreesC in 97% H-2/3% H2O with and without polarisation. Impedance spectroscopy was used for electrochemical characterisation. The results were compared to earlier investigations of a less pure nickel/YSZ interface. The pure interface developed different structures depending on whether or not the samples were polarised. Despite,the purity of the nickel, impurities were found in the interfacial region. The pure electrodes/interfaces showed, area specific polarisation resistances 10 times lower than the impure interfaces. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：27 / 37

页数：11

共 12 条

[1] Morphological changes at the interface of the nickel-yttria stabilized zirconia point electrode [J].