Jürgen Fleig is currently a professor at Technische Universität Wien. Prior to joining the university, Fleig was a scientist at Max Planck Institute of Solid State Research. His research efforts have focused on defects, ion motion and electrochemical reactions in solids, with emphasis on materials used in energy technology (fuel cells) and dielectrics or piezoelectrics.
His work has led to the development of novel experimental tools for investigating ionic solids and fundamental contributions to the basic interpretation of impedance spectra in solid state systems and in understanding the kinetics of electrochemical reactions at gas/solid interfaces.
Fleig has been recognized by the American Ceramic Society, International Society of Electrochemistry, and the Aventis Foundation. He has served on the editorial boards of several scientific journals and co-organized a number of symposia and conferences in the field of solid state ionics and solid state electrochemistry.