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Your search keyword '"Tuller, Harry L."' showing total 49 results
Start Over Author "Tuller, Harry L." Publisher the electrochemical society
49 results on '"Tuller, Harry L."'

7. Experimental Design for Voltage Driven Tracer Incorporation and Diffusion Studies on Oxide Thin Film Electrodes

Author

Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Huber, Tobias, Yildiz, Bilge, Tuller, Harry L, Navickas, Edvinas, Sasaki, Kazunari, Friedbacher, Gernot, Hutter, Herbert, Fleig, Juergen, Tuller, Harry L., Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Huber, Tobias, Yildiz, Bilge, Tuller, Harry L, Navickas, Edvinas, Sasaki, Kazunari, Friedbacher, Gernot, Hutter, Herbert, Fleig, Juergen, and Tuller, Harry L.

Abstract

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., United States. Department of Defense. Basic Energy Sciences (grant No. DE-SC0002633)

Published
2018

31. Mechanical, Electrical, and Optical Properties of (Pr,Ce)O[subscript 2] Solid Solutions: Kinetic Studies

Author

Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Bishop, Sean, Kim, Jae Jin, Thompson, Nicholas J., Chen, Di, Kuru, Yener, Stefanik, Todd, Tuller, Harry L., Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Bishop, Sean, Kim, Jae Jin, Thompson, Nicholas J., Chen, Di, Kuru, Yener, Stefanik, Todd, and Tuller, Harry L.

Abstract

Praseodymium doped cerium oxide (PCO) shows mixed ionic and electronic conducting (MIEC) characteristics at relatively high pO2 (e.g. air) and enhanced oxygen storage capacity (OSC), of interest for solid oxide fuel cell (SOFC) cathodes and three way catalysts, resulting from the ready reduction of Pr to its trivalent state. This reduction also results in a change of lattice parameter, known as chemical expansion, and changes in optical absorption related to the formation of a Pr impurity band. These properties can be measured as a function of time, yielding oxide ion diffusion and surface exchange coefficients. In this manuscript, the diffusivity and/or surface exchange of PCO is explored using TGA and dilatometry of bulk specimens and HTXRD and optical absorption of thin films. The HTXRD and optical absorption measurements promise the ability to monitor both thermodynamic and kinetic properties of thin film materials exhibiting wide swings in oxygen stoichiometry., United States. Dept. of Energy. Office of Basic Energy Sciences (Award DE SC0002633), National Science Foundation (U.S.). Division of Materials Research (Material World Network DMR-6920078), MIT Energy Initiative (Fellowship)

Published
2013

49. Experimental Design for Voltage Driven Tracer Incorporation and Diffusion Studies on Oxide Thin Film Electrodes

Author

Edvinas Navickas, Juergen Fleig, Herbert Hutter, Harry L. Tuller, Gernot Friedbacher, Bilge Yildiz, Tobias Huber, Kazunari Sasaki, Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Huber, Tobias, Yildiz, Bilge, and Tuller, Harry L

Subjects
Materials science, Renewable Energy, Sustainability and the Environment, 020209 energy, Analytical chemistry, Oxide, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, Chemical engineering, chemistry, TRACER, 0202 electrical engineering, electronic engineering, information engineering, Materials Chemistry, Electrochemistry, Thin film electrode, Diffusion (business), 0210 nano-technology, Voltage
Abstract

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., United States. Department of Defense. Basic Energy Sciences (grant No. DE-SC0002633)

Published
2017

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