In Situ X-Ray Spectromicroscopy Investigation of the Material Stability of SOFC Metal Interconnects in Operating Electrochemical Cells

被引：15

作者：

Bozzini, Benedetto ^{[1
]}

Tondo, Elisabetta ^{[1
]}

Prasciolu, Mauro ^{[2
]}

Amati, Matteo ^{[3
]}

Abyaneh, Majid Kazemian ^{[3
]}

Gregoratti, Luca ^{[3
]}

Kiskinova, Maya ^{[3
]}

机构：

[1] Univ Salento, Dipartimento Ingn Innovaz, I-73100 Lecce, Italy

[2] CNR IOM, I-34149 Basovizza, Italy

[3] Sincrotrone Trieste, I-34149 Trieste, Italy

来源：

CHEMSUSCHEM | 2011年 / 4卷 / 08期

关键词：

electrochemistry; fuel cells; photoelectron spectroscopy; redox chemistry; surface diffusion; STAINLESS-STEEL; OXIDE; INTERCALATION; SPECTROSCOPY; CORROSION; COATINGS; ALLOY;

D O I：

10.1002/cssc.201100140

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The present in situ study of electrochemically induced processes occurring in Cr/Ni bilayers in contact with a YSZ electrolyte aims at a molecular-level understanding of the fundamental aspects related to the durability of metallic interconnects in solid oxide fuel cells (SOFCs). The results demonstrate the potential of scanning photoelectron microspectroscopy and imaging to follow in situ the evolution of the chemical states and lateral distributions of the constituent elements (Ni, Cr, Zr, and Y) as a function of applied cathodic potential in a cell working at 650 degrees C in 10(-6) mbar O-2 ambient conditions. The most interesting findings are the temperature-induced and potential-dependent diffusion of Ni and Cr, and the oxidation-reduction processes resulting in specific morphology-composition changes in the Ni, Cr, and YSZ areas.

引用

页码：1099 / 1103

页数：5

共 22 条

[1] In-situ study of operating SOFC LSM/YSZ cathodes under polarization by photoelectron microscopy [J].