Kim, Sangtae - University of California, Davis - Department of Materials Science and Engineering

个人简介

Sangtae Kim received his B.S. and M.S. degrees in chemistry (physics minor) from Sogang University in South Korea and his Ph.D. (1999) in chemistry from the University of Houston (Advisor: Prof. Allan J. Jacobson). His dissertation efforts focused on investigation of the oxygen transport kinetics in advanced oxides and on evaluating the suitability of those materials for technological applications such as solid oxide fuel cell (SOFC) cathodes and/or gas separation membrane reactors. The primary interest was in understanding of the importance of the gas-solid surface exchange rates relative to bulk diffusion in the mixed ionic and electronic conductors (MIECs). With completion of his Ph.D., he joined Prof. Joachim Maier research group at the Max Planck Institute for Solid State Research (Max-Planck-Institut für Festköperforschung) in Stuttgart, Germany as Guest Scientist (2000-2004). During his four-year stint at MPI, his research was devoted to understanding in great detail of the interfacial contribution to the overall electrical conduction in nanograined (the grain size below 50 nm) functional oxide ceramics such as solid electrolytes (ceria and yttria stabilized zirconia) and a varistor (ZnO). The main focus of interest was how the defect chemistry, and thus the conduction behavior, at the interface differs from that in the crystal interior of the electroceramic materials, and how to utilize/modify the interfacial property to optimize the materials property. He came to the Department of Chemical Engineering and Materials Science at the University of California, Davis in May, 2004 as Assistant Professor. Sangtae Kim’s current research centers on mass and charge transport in nanostructured ionic and mixed conducting oxides (viz. interfacial defect thermodynamics and kinetics) that forms the basis of applications such as solid oxide fuel cells (SOFCs), gas separation membranes (proton conductor), and chemical sensors. He is also an affiliate faculty of the Institute of Transportation Studies at UC Davis, Nanomaterials in the Environment, Agriculture, and Technology (NEAT) Organized Research Unit (ORU) and Center for Information Technology Research in the Interest of Society (CITRIS).

近期论文

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S. K. Kim, S. Khodorov, C.-T. Chen, S. Kim, I. Lubomirsky, “A Simple Model for Determination of Grain Boundary Potential from Current-Voltage Characteristics” S. Kim, ” Grain boundary conductivity” In: Savinell R., Ota K., Kreysa G. (Ed.) Encyclopedia of Applied Electrochemistry: SpringerReference,. Springer-Verlag, New York, Heidelberg, London, Dordrecht. S. Kim, “Preface to the viewpoint set on: Solid oxide fuel cells”, Scripta Mater., 2011, 65(2), 65. S. Kim, S. Yamaguchi, J. Elliot, (editorial article) “Solid State Ionics in the 21st Century: Current Status and Future Prospects”, MRS Bull. 2009, 34, 900. X. Guo, S. Kim, (invited), “Nanostructured Ionic and Mixed Conducting Oxides”, in Annual Review of Nano Research, C. J. Brinker and G. Cao, Eds., Volume 3, pp 495-543, The World Scientific Publishing Co., 2008. S. Kim, “Nano-structured solid state electrochemical systems: Applications and challenges”, Interface, (invited), 2006, 15(3), 28. M. J. Pietrowski, R. A. De Souza, S. Kim, Z. A. Munir, M. Martin, “Dehydration kinetics of nano-YSZ ceramics monitored by in-situ Infrared Spectroscopy”, Solid State Ionics, 2012, 225(4), 241-244 C. -T. Chen, S. Sen, S. Kim, “Effective concentration of mobile oxygen-vacancies in heavily doped cubic zirconia: Results from combined electrochemical impedance and NMR spectroscopies”, Chem. Mater., 2012, 24, 3604-3609 C. -T. Chen, S. K. Kim, M. Ibbotson, A. Yeung, S. Kim, “Thermionic Emission of Protons across a Grain Boundary in Y-doped SrZrO3, a Hydrogen Pump”, Int. J. Hydrogen Energy, 2012, 37, 12432 C. T. Chen, K. Choi, S. Kim, ” Current-Voltage characteristics of a grain boundary in polycrystalline Sr-doped LaGaO3″, Phys.Chem.Chem.Phys, 2012, 14(25), 9047 R. Korobko, C.-T. Chen, S. Kim, S. R. Cohen, E. Wachtel, N. Yavo, I. Lubomirsky, “Influence of Gd content on the room temperature mechanical properties of Gd-doped ceria”, Scripta Mater., 2012, 66(3-4), 155. F. Iguchi, C.-T. Chen, H. Yugami, S. Kim, “Direct Evidence of Potential Barriers at Grain Boundaries in Y-doped BaZrO3 from DC-Bias Dependence Measurements”, J. Mater. Chem., 2011, 21(41), 16517-16523. J. Huh, J. Na, J.S. Ha, S. Kim, G.T. Kim, “Asymmetric Contacts on a Single SnO2 Nanowire Device: An Investigation Using an Equivalent Circuit Model”, ACS Appl. Mater. Interfaces, 2011, 3(8), 3097. R. A. De Souza, Z. A. Munir, S. Kim, M. Martin, “Defect Chemistry of Grain Boundaries in Proton-conducting Solid Oxides”, Solid State Ionics, 2011, 196, 1. *Most read paper* S. Chen, G. Costa, S. Wang, Z. M. Munir, S. Kim, A. Navrotsky, “Grain Boundary Enthalpies of Cubic Yttria – Stabilized Zirconia”, J. Am. Ceram. Soc., 2011, 94[7], 2181. F. Yang, S. Kim. Y. Takamura, “Strain effect on the electrical conductivity of epitaxial La0.67Sr0.33MnO3 thin films”, Scripta Mater.,2011, 65, 29. C. T. Chen, C. E. Danel, S. Kim, “On the Origin of the Blocking Effect of Grain-Boundaries on Proton Transport in Yttrium doped Barium Zirconates”, J. Mater. Chem., 2011, 21(14), 5435-5442. M. K. Joo, P. Kang, G.-T. Kim, S. Kim, “A dual analyzer for real-time impedance and noise spectroscopy for transient measurements”, Rev. Sci. Instrum., 2011, 82, 034702. H. J. Avila-Paredes, C. T. Chen, S. Wang, R. A. De Souza, M. Martin, Z. A. Munir, and S. Kim, “Grain Boundaries in Dense Nanocrystalline Ceria Ceramics: Exclusive Pathways for Proton Conduction at Room Temperature,” J. Mater. Chem., 2010, 20, 10110-10112. D.V. Quach, H. J. Avila-Paredes, S. Kim, M. Martin and Z.A. Munir, “Pressure effects and grain growth kinetics in the consolidation of nanostructured fully stabilized zirconia by pulsed electric current sintering,” Acta Mater., 2010, 58, 5022-5030. D. V. Quach, S. Kim, M. Martin, and Z. A. Munir, “Sintering and Properties of Nanometric Functional Oxides”, Ceram. Trans., 2010, vol 212. S. Kim, P. Jain, H. J. Avila-Predes, A. Thron, K. van Benthem, S. Sen, “Strong immobilization of charge carriers near the surface of a solid oxide electrolyte”, J. Mater. Chem., 2010, 20, 3855. H. J. Avila-Paredes, E. Barrera-Calva, H. U. Anderson, R. A. De Souza, M. Martin, Z. A. Munir and S. Kim “Room-Temperature Protonic Conduction in Nanocrystalline Films of Yttria-Stabilized Zirconia”, J. Mater. Chem., 2010, 20, 6235-6238. S. Wang, S.Chen, A. Navrotsky, M. Martin, S. Kim, Z. A. Munir, “Modified polyol-mediated synthesis and consolidation of Gd-doped ceria nanoparticles”, Solid State Ionics, 2010, 181, 372. P. Jain, S. Kim, R. Youngman, S. Sen, “Direct Observation of Defect Dynamics in Nanocrystalline CaF2: Results from 19F MAS NMR Spectroscopy”, J. Phys. Chem. Lett., 2010, 1, 1126.