Experimental Design for Voltage Driven Tracer Incorporation and Diffusion Studies on Oxide Thin Film Electrodes
Author(s)Navickas, Edvinas; Sasaki, Kazunari; Friedbacher, Gernot; Hutter, Herbert; Fleig, Juergen; Huber, Tobias; Yildiz, Bilge; Tuller, Harry L; ... Show more Show less
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The effect of an applied overpotential on oxygen isotope incorporation and diffusion in oxide thin film electrodes is investigated by a novel experimental approach. A special electrode geometry leads to in-plane electron flow, perpendicular oxide ion flow and a well-defined laterally varying driving force. This design allows one to obtain a series of tracer depth profiles induced by a range of overpotentials on one and the same thin film. The approach was applied to La0.8Sr0.2MnO3(LSM) thin films deposited by pulsed laser deposition (PLD) on yttria stabilized zirconia (YSZ) single crystals. Tracer depth profiles were measured by secondary ion mass spectrometry (SIMS). These depth profiles include examples of pronounced apparent uphill diffusion that can be explained by considering an interplay of polarization-induced changes in stoichiometry within the LSM grains combined with fast oxygen transport along the grain boundaries.
DepartmentMassachusetts Institute of Technology. Department of Materials Science and Engineering; Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Journal of The Electrochemical Society
The Electrochemical Society
Huber, Tobias M., Edvinas Navickas, Kazunari Sasaki, Bilge Yildiz, Harry Tuller, Gernot Friedbacher, Herbert Hutter, and Juergen Fleig. “Experimental Design for Voltage Driven Tracer Incorporation and Diffusion Studies on Oxide Thin Film Electrodes.” Journal of The Electrochemical Society 164, no. 7 (2017): F809–F814.
Final published version