Short Course #4 Impedance Spectroscopy
Mark E. Orazem, Instructor
This course is intended for chemists, physicists, materials scientists, and engineers with an interest in applying electrochemical impedance techniques to study a broad variety of electrochemical processes. Ideally, the attendee should have some experience with making impedance measurements. The attendee will develop a basic understanding of the technique, the sources of errors in impedance measurements, the manner in which experiments can be optimized to reduce these errors, and the use of regression to interpret measurements in terms of meaningful physical properties. The following topics will be covered.
the motivation for using impedance spectroscopy advantages as compared to other transient techniques and the conditions under which its use is ideally suited
the type of information that can be extracted from impedance measurements, including the limitations of the technique
proper selection of experimental parameters
the types of errors expected in impedance measurements, and methods to assess the importance of these errors and to reduce their magnitude
use of the Kramers-Kronig relations as a tool for evaluating impedance data
use of regression techniques and appropriate selection of weighting strategies
application of electrical circuit analogues
development of mathematical models appropriate for interpretation of impedance spectra in terms of physical properties
applications to different systems including corrosion, fuel cells, characterization of electronic materials, and transport through membranes such as skin
About the Instructor
Mark E. Orazem is a recognized expert on impedance spectroscopy. He has offered his short course on the topic at ECS meetings eight times since 2000. His course has also been delivered to the San Francisco and Twin Cities Sections.
Prof. Orazem organized the sixth International Symposium on Impedance Spectroscopy, held in May 2004, and he is the guest editor of a special issue of Electrochimica Acta dedicated to this topic. He has consulted with companies on the use of impedance spectroscopy. His group has developed the measurement model approach for statistical analysis of impedance spectroscopy. With Bernard Tribollet of the CNRS in Paris, he is writing a textbook on the subject.
Prof. Orazem is the faculty coordinator for a broad-ranging fuel cell research effort at the University of Florida. He is vice-president of the International Society of Electrochemistry and an Associate Editor for the Journal of The Electrochemical Society. He has published over 100 refereed articles and chapters in books; and he was recognized as the University of Florida Research Foundation Professor (1999-2002) and the Charles A. Stokes Professor of Chemical Engineering (2000-2003).
