Tags

• impedance 8
• modeling 3
• MIEC 4
• FEA 1
• modelling 1
• EIS 9
• LSM 1
• O2 reduction 1
• NLEIS 7
• Microelectrode 1
• Pt 1
• LSC 9
• perovskite 2
• LaCoO3 1
• SDC 3
• LSF 1
• planar cell 1
• fabrication 1
• thermal expansivity 1
• oxygen-vacancy 1
• chemical expansivity 1
• SEM 3
• FIB 1
• Ni-YSZ 1
• imaging 2
• mixed-ionic-electronic-conductor 1
• reaction mechanism 1
• kinetics 1
• magnetism 1
• SQUID 1
• Faraday magnetometer 1
• thin film 3
• O2-kinetics 1
• LCF 1
• oxygen nonstoichiometry 1
• Coulometric titration 1
• FIB-SEM 1
• BET 1
• EDX 1
• EDS 1
• COBRA 1
• ESM 2
• scanning probe 1
• ceria 2
• STIM 3
• LSCF 1
• conference 1
• microstructure 2
• students 4
• AFM 1
• teaching 1
• electrochemistry 1
• software 1
• art 1
• data center 1
• renewable storage 1
• fuel cell 1
• diagnostics 1
• machine learning 1
• simulation 1

impedance

• Simulation-Informed Machine Learning Diagnostics of Solid Oxide Fuel Cell Stack with Electrochemical Impedance Spectroscopy
• Simulation of the Diffusional Impedance and Application to the Characterization of Electrodes with Complex Microstructures
• Nonlinear Impedance Analysis of La_0.4Sr_0.6Co_0.2Fe_0.8O_3-δ Thin Film Oxygen Electrodes
• Measurement and Modeling of the Impedance Characteristics of Porous La_1-xSr_xCoO_3-δ Electrodes
• Mechanisms and rate laws for oxygen exchange on mixed-conducting oxide surfaces
• Nonlinear electrochemical impedance spectroscopy for solid oxide fuel cell cathode materials
• Limitations of charge-transfer models for mixed-conducting oxygen electrodes
• Electrode Kinetics of Porous Mixed-Conducting Oxygen Electrodes

modeling

• Measurement and Modeling of the Impedance Characteristics of Porous La_1-xSr_xCoO_3-δ Electrodes
• Limitations of charge-transfer models for mixed-conducting oxygen electrodes
• Electrode Kinetics of Porous Mixed-Conducting Oxygen Electrodes

MIEC

• Oxygen nonstoichiometry and defect chemistry of the mixed conductor La0.9Ca0.1FeO3 − δ at low oxygen partial pressure
• Mechanisms and rate laws for oxygen exchange on mixed-conducting oxide surfaces
• Limitations of charge-transfer models for mixed-conducting oxygen electrodes
• Electrode Kinetics of Porous Mixed-Conducting Oxygen Electrodes

FEA

• Reference Electrode Placement in Thin Solid Electrolytes

modelling

• Reference Electrode Placement in Thin Solid Electrolytes

EIS

• Develope Techniques & Tests
• Non-linear Electrochemical Impedance Spectroscopy
• Performance Variability and Degradation in Porous La_1-xSr_xCoO_3-δ Electrodes
• Origin of Enhanced Chemical Capacitance in La_0.8Sr_0.2CoO_3-δ Thin Film Electrodes
• Influence of Electrolyte Surface Planarization on the Performance of the Porous SOFC Cathodes
• Microelectrode Array for Isolation of Electrode Polarization on Planar Solid Electrolytes
• Factors Governing Oxygen Reduction in Solid Oxide Fuel Cell Cathodes
• Effect of Polarization on and Implications for Characterization of LSM-YSZ Composite Cathodes
• Reference Electrode Placement in Thin Solid Electrolytes

LSM

• Effect of Polarization on and Implications for Characterization of LSM-YSZ Composite Cathodes

O2 reduction

• Factors Governing Oxygen Reduction in Solid Oxide Fuel Cell Cathodes

NLEIS

• Develope Techniques & Tests
• Non-linear Electrochemical Impedance Spectroscopy
• Nonlinear Impedance Analysis of La_0.4Sr_0.6Co_0.2Fe_0.8O_3-δ Thin Film Oxygen Electrodes
• Performance Variability and Degradation in Porous La_1-xSr_xCoO_3-δ Electrodes
• Origin of Enhanced Chemical Capacitance in La_0.8Sr_0.2CoO_3-δ Thin Film Electrodes
• Nonlinear electrochemical impedance spectroscopy for solid oxide fuel cell cathode materials
• Full-spectrum nonlinear response of a sinusoidally modulated rotating disk electrode

Microelectrode

• Microelectrode Array for Isolation of Electrode Polarization on Planar Solid Electrolytes

Pt

• Microelectrode Array for Isolation of Electrode Polarization on Planar Solid Electrolytes

LSC

• Anomalous Interface and Surface Strontium Segregation in (La_1–ySr_y)₂CoO_4±δ/La_1–xSr_xCoO_3−δ Heterostructured Thin Films
• Performance Variability and Degradation in Porous La_1-xSr_xCoO_3-δ Electrodes
• Origin of Enhanced Chemical Capacitance in La_0.8Sr_0.2CoO_3-δ Thin Film Electrodes
• Measurement and Modeling of the Impedance Characteristics of Porous La_1-xSr_xCoO_3-δ Electrodes
• High Temperature Magnetic Properties of Sr-Doped Lanthanum Cobalt Oxide (La_1−xSr_xCoO_3−δ)
• High temperature Faraday balance for in situ measurement of magnetization in transition metal oxides
• Nonlinear electrochemical impedance spectroscopy for solid oxide fuel cell cathode materials
• Thermal and Chemical Expansion of Sr-Doped Lanthanum Cobalt Oxide (La_1-xSr_xCoO_3-δ)
• Microelectrode Array for Isolation of Electrode Polarization on Planar Solid Electrolytes

perovskite

• Oxygen nonstoichiometry and defect chemistry of the mixed conductor La0.9Ca0.1FeO3 − δ at low oxygen partial pressure
• Microelectrode Array for Isolation of Electrode Polarization on Planar Solid Electrolytes

LaCoO3

• Microelectrode Array for Isolation of Electrode Polarization on Planar Solid Electrolytes

SDC

• Imaging space charge regions in Sm-doped ceria using electrochemical strain microscopy
• Influence of Electrolyte Surface Planarization on the Performance of the Porous SOFC Cathodes
• Microelectrode Array for Isolation of Electrode Polarization on Planar Solid Electrolytes

LSF

• Microelectrode Array for Isolation of Electrode Polarization on Planar Solid Electrolytes

planar cell

• Microelectrode Array for Isolation of Electrode Polarization on Planar Solid Electrolytes

fabrication

• Microelectrode Array for Isolation of Electrode Polarization on Planar Solid Electrolytes

thermal expansivity

• Thermal and Chemical Expansion of Sr-Doped Lanthanum Cobalt Oxide (La_1-xSr_xCoO_3-δ)

oxygen-vacancy

• Thermal and Chemical Expansion of Sr-Doped Lanthanum Cobalt Oxide (La_1-xSr_xCoO_3-δ)

chemical expansivity

• Thermal and Chemical Expansion of Sr-Doped Lanthanum Cobalt Oxide (La_1-xSr_xCoO_3-δ)

SEM

• Performance Variability and Degradation in Porous La_1-xSr_xCoO_3-δ Electrodes
• Three-dimensional reconstruction of a solid-oxide fuel-cell anode
• Influence of Electrolyte Surface Planarization on the Performance of the Porous SOFC Cathodes

FIB

• Three-dimensional reconstruction of a solid-oxide fuel-cell anode

Ni-YSZ

• Three-dimensional reconstruction of a solid-oxide fuel-cell anode

imaging

• Develope Techniques & Tests
• Three-dimensional reconstruction of a solid-oxide fuel-cell anode

mixed-ionic-electronic-conductor

• Mechanisms and rate laws for oxygen exchange on mixed-conducting oxide surfaces

reaction mechanism

• Mechanisms and rate laws for oxygen exchange on mixed-conducting oxide surfaces

kinetics

• Mechanisms and rate laws for oxygen exchange on mixed-conducting oxide surfaces

magnetism

• High temperature Faraday balance for in situ measurement of magnetization in transition metal oxides

SQUID

• High temperature Faraday balance for in situ measurement of magnetization in transition metal oxides

Faraday magnetometer

• High temperature Faraday balance for in situ measurement of magnetization in transition metal oxides

thin film

• Nonlinear Impedance Analysis of La_0.4Sr_0.6Co_0.2Fe_0.8O_3-δ Thin Film Oxygen Electrodes
• Anomalous Interface and Surface Strontium Segregation in (La_1–ySr_y)₂CoO_4±δ/La_1–xSr_xCoO_3−δ Heterostructured Thin Films
• Origin of Enhanced Chemical Capacitance in La_0.8Sr_0.2CoO_3-δ Thin Film Electrodes

O2-kinetics

• Origin of Enhanced Chemical Capacitance in La_0.8Sr_0.2CoO_3-δ Thin Film Electrodes

LCF

• Oxygen nonstoichiometry and defect chemistry of the mixed conductor La0.9Ca0.1FeO3 − δ at low oxygen partial pressure

oxygen nonstoichiometry

• Oxygen nonstoichiometry and defect chemistry of the mixed conductor La0.9Ca0.1FeO3 − δ at low oxygen partial pressure

Coulometric titration

• Oxygen nonstoichiometry and defect chemistry of the mixed conductor La0.9Ca0.1FeO3 − δ at low oxygen partial pressure

FIB-SEM

• Performance Variability and Degradation in Porous La_1-xSr_xCoO_3-δ Electrodes

BET

• Performance Variability and Degradation in Porous La_1-xSr_xCoO_3-δ Electrodes

EDX

• Performance Variability and Degradation in Porous La_1-xSr_xCoO_3-δ Electrodes

EDS

• Performance Variability and Degradation in Porous La_1-xSr_xCoO_3-δ Electrodes

COBRA

• Anomalous Interface and Surface Strontium Segregation in (La_1–ySr_y)₂CoO_4±δ/La_1–xSr_xCoO_3−δ Heterostructured Thin Films

ESM

• High-throughput sequential excitation for nanoscale mapping of electrochemical strain in granular ceria
• Imaging space charge regions in Sm-doped ceria using electrochemical strain microscopy

scanning probe

• Scanning thermo-ionic microscopy for probing local electrochemistry at the nanoscale

ceria

• High-throughput sequential excitation for nanoscale mapping of electrochemical strain in granular ceria
• Scanning thermo-ionic microscopy for probing local electrochemistry at the nanoscale

STIM

• Develope Techniques & Tests
• Scanning Thermo-Ionic Microscopy: Probing Nanoscale Electrochemistry via Thermal Stress-Induced Oscillation
• Scanning thermo-ionic microscopy for probing local electrochemistry at the nanoscale

LSCF

• Nonlinear Impedance Analysis of La_0.4Sr_0.6Co_0.2Fe_0.8O_3-δ Thin Film Oxygen Electrodes

conference

• Brian Gerwe and Jon Witt Visit National Harbor, MD for ECS 232nd Meeting

microstructure

• Simulation of the Diffusional Impedance and Application to the Characterization of Electrodes with Complex Microstructures
• Scanning Thermo-Ionic Microscopy: Probing Nanoscale Electrochemistry via Thermal Stress-Induced Oscillation

students

• Jon successfully defended his thesis
• Brian successfully defended his thesis
• Maria Politi joins the Solid State Electrochemistry and Energy Lab
• Lê Trà Giang (Zang Le) joins the Solid State Electrochemistry and Energy Lab

AFM

• High-throughput sequential excitation for nanoscale mapping of electrochemical strain in granular ceria

teaching

• Turning a New Leaf on Traditional Lectures

electrochemistry

• Develope Techniques & Tests

software

• Develope Techniques & Tests

art

• UW ChemE Science & Engineering as Art Competition

data center

• Stu interviewed about Greener Data Center

renewable storage

• Stu interviewed about Greener Data Center

fuel cell

• Stu interviewed about Greener Data Center

diagnostics

• Simulation-Informed Machine Learning Diagnostics of Solid Oxide Fuel Cell Stack with Electrochemical Impedance Spectroscopy

machine learning

• Simulation-Informed Machine Learning Diagnostics of Solid Oxide Fuel Cell Stack with Electrochemical Impedance Spectroscopy

simulation

• Simulation-Informed Machine Learning Diagnostics of Solid Oxide Fuel Cell Stack with Electrochemical Impedance Spectroscopy