New diagnostic methods for polarized state
Advances in Electrocatalysis, Materials, Diagnostics and Durability
Advanced diagnostics, models and design
High-temperature fuel cells
Published Online: 15 DEC 2010
Copyright © John Wiley & Sons, Ltd. All rights reserved.
Handbook of Fuel Cells
How to Cite
Kawada, T. 2010. New diagnostic methods for polarized state. Handbook of Fuel Cells. .
- Published Online: 15 DEC 2010
Electrode polarization is a key to determine the dynamic feature of solid oxide fuel cells (SOFCs). Recently, various methods have been proposed for the evaluation of the electrode under the polarized state. Photoelectron spectroscopy and infrared spectroscopy have been applied to detect the surface intermediate species. Raman spectroscopy is a useful tool for high-temperature in situ measurements, and is used for the study of carbon deposition and sulfur poisoning, etc. Attempts were made to measure the local oxygen potential in the electrode layer in order to evaluate the oxygen reaction pathway. The potentiometric method and X-ray absorption were employed for the in situ measurement. Isotope exchange and secondary ion mass spectrometry analysis were also used to trace the oxygen reaction path. Although most of the new techniques are still under development, the information obtained from these measurements gives new insight on electrode reaction kinetics.
- oxide ion;
- reaction pathway;
- carbon deposition;
- model electrode;
- X-Ray absorption near-edge structure (XANES);
- IR emission;
- isotope exchange;