D1.3 - Characterization of Ageing of Solid Electrolyte Sen¬sors by Impedance Spectroscopy

J. Zosel, F. Gerlach, K. Ahlborn, U. Guth, A. Solbach, D. Tuchtenhagen, C. Treu & H. Heelemann
Ageing processes as the most important limitations for long-term stability of electrochemical sensors depend on side conditions of application, sensor operation and construction as well as the sensor materials. Solid electrolyte sensors operating at temperatures above 500 °C show some characteristic ageing phenomena like electrolyte degradation, electrode delamination, diffusion of dust particles to the electrochemical active sites and changes of diffusion barriers. The interaction of these processes complicates their clarification and the proper assortment of...