A5073303857- Advancements in Solid Oxide Fuel Cells
- Fuel Cells and Related Materials
- Electronic and Structural Properties of Oxides
- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Magnetic and transport properties of perovskites and related materials
- Advanced Battery Materials and Technologies
- Analytical Chemistry and Sensors
- Electron and X-Ray Spectroscopy Techniques
- Catalytic Processes in Materials Science
- Ferroelectric and Piezoelectric Materials
- Catalysis and Oxidation Reactions
- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and devices
- Electrochemical Analysis and Applications
- Microwave Dielectric Ceramics Synthesis
- Conducting polymers and applications
- Molten salt chemistry and electrochemical processes
- Metallurgical Processes and Thermodynamics
- Acoustic Wave Resonator Technologies
- Nuclear materials and radiation effects
- Extraction and Separation Processes
- Corrosion Behavior and Inhibition
- Anodic Oxide Films and Nanostructures
Karlsruhe Institute of Technology
2013-2022
National Institute of Advanced Industrial Science and Technology
2017
Mie University
2017
Central Research Institute of Electric Power Industry
2017
Nagoya University
2017
Leibniz-Institut für Werkstofforientierte Technologien - IWT
2000-2011
Karlsruhe University of Education
2006-2010
DVGW-Forschungsstelle am Engler-Bunte-Institut des Karlsruher Instituts für Technologie
2010
University of Stuttgart
2004-2007
Deutsche Nationalbibliothek
2004-2007
The impedance of anode-supported single cells [ yttria-stabilized zirconia (YSZ) anode; cathode; 8YSZ electrolyte; area ] was characterized in a broad measuring range temperature and air/fuel gas composition. data has been analyzed by calculating the distribution function relaxation times (DRTs). DRT computations enabled us to separate five different loss mechanisms occurring inside cathode anode without need an equivalent circuit. Two processes exhibit systematic dependency on changes...
A high-resolution impedance study of the hydrogen oxidation in (yttria-stabilized zirconia) cermet anodes has been realized consideration a broad range operating conditions (temperature and partial pressure fuel gas components , He). major problem this respect concerns origin physical interpretation empirical equivalent circuits used to fit experimental data. We applied two-stage approach for evaluation data: (i) at first, by deconvolution distribution function relaxation times (DRT), four...
Lithium iron phosphate is a promising candidate material for Li-Ion batteries. In this study, the rate determining processes are assessed in more detail order to separate performance limiting factors. Electrochemical impedance spectroscopy (EIS) data of experimental LiFePO4/Lithium-cells deconvoluted by method distribution relaxation times (DRT), what necessitates pre-processing capacitive branch. This results separation into cathode and anode polarization proposition physically motivated...
The electronic structure, defect chemistry, and transport properties of members the mixed ionic conducting SrTi1-xFexO3-y (STF) solid-solution system are revisited, an improved chemical model is proposed in which Fe considered to be one main constituents that shape energy-band structure STF, rather than impurity dopant with acceptor-like character. As a consequence high inherent deficiency oxygen sublattice, introduced by mixed-valence states B-site cations Ti4+ Fe3+, vacancies interstitials...
A zero-dimensional stationary model for the I-U characteristics of anode-supported solid oxide fuel cells (SOFC) is presented. The different kinds electrode polarization resistances are separated from experimental impedance data by means a detailed equivalent circuit specified cells. This has big advantage that partial pressure and temperature dependency exchange current densities could be determined fit semi-empirical power law equations. For first time, exponents b pH2- pH2O-dependency...
This article presents a literature review and new results on experimental theoretical investigations of the electrochemistry solid oxide fuel cell (SOFC) model anodes, focusing nickel/yttria-stabilized zirconia (Ni/YSZ) materials system with operation under H2/H2O atmospheres. Micropatterned anodes were used for electrochemical characterization well-defined operating conditions. Structural chemical integrity was confirmed by ex situ pre-test post-test microstructural analysis. Elementary...
The three-dimensional microstructures of a lab-scale and high-power LiFePO4 cathode for lithium-ion cells are analyzed by combined focused ion beam (FIB) / scanning electron microscopy (SEM) tomography. spatial distributions (a) carbon black as electronic conductor (b) active material (c) pore volume reconstructed appropriate image processing methods. global threshold segmentation procedure is replaced refined local method, which accounts gradients in luminosity even within very large imaged...