Research Activities

Research Interests:

• Electrical (conducting and dielectric) properties of electroceramics: solid electrolytes, semiconductors, and mixed conductors, dielectrics, ferroelectrics
• Impedance spectroscopy for energy and electronic applications
• Surface/grain-boundary effects in electroceramics
• Interface thermodynamics and kinetics
• Interface structure – property relationship
• Nanoscale effects in solid state ionics
• High-temperature versus low-temperature defect chemistry
• Application of electroceramics: solid oxide fuel cells, Li-ion batteries, ceramic sensors, catalysis, photoelectrochemical cells, solar cells, ceramic capacitors, ferroelectric devices

Research Projects:

• Artificial intelligence assisted ionics-based materials development platform, Engineering Research Center, NRF
• Investigation of body impedance for health care and medical diagnosis, NRF
• New paradigm for effective practical impedance spectroscopy, NRF
• Electrical characterization of styrene butadiene rubber for tires, PI: Mirae SI, KIAT
• Electrochemical interpretation of the permeation performance of ceramic composite oxygen transport membrane (OTM), subproject, KIER
• Mechanism for improving performance of various solar cells by in-depth AC characterization, Mid-career Research Program (Core Research), NRF
• Multi-species transport phenomena in protonic ceramics: experiments and simulations, subproject of Fusion Research Program for Green Technologies, PI:KIST,NRF
• Electrical characterization of beta alumina ceramics, academy partner in Energy Efficiency & Resources Core Technology Program for beta alumina production, PI: FINETECH, Co. Ltd., KETEP
• Development of advanced hybrid materials and their evaluation techniques for mobile hydrogen storage, BRL (Basic Research Laboratory) Program, NRF
• Electrochemical characterization of solid state electrochemical ammonia synthesis, subsubproject, KIER
• Electrochemical characterization and analysis of solid electrolytes, KIMS
• Development of characterization techniques for the electrical properties of nanostructured electrolytes and the interfacial phenomena, subsubproject for Fundamental R&D Program for Core Technology of Materials, PI: KIST, KEIT
• Relationship between nonlinear dielectric characteristics, processing variables, and degradation phenomena in BaTiO₃-based MLCC, Center for Ceramic Passive Components, SNU, Samsung Electromechanics
• Nanoionic Oxides for Green Energy, WCU (The World Class University) Program, NRF
• Ionic conductivity of ceramic materials, FINETECH, Co. Ltd.
• Development of ceramic hydrogen electrode for high temperature steam electrolysis, subsubproject of Hydrogen Energy R&D Center (HERC), 21st century Frontier R&D Program, MEST
• Development of radiation-assisted processes for clean energy harvesting (Co-PI), subproject of Priority Research Centers Program (Research Institute for Catalysis, JNU), NRF
• Impedance model development for the dielectric characteristics with respect to the BT grain size, Center for Ceramic Passive Components, SNU, Samsung Electromechanics
• Development and Application of Impedance Modelling for Electroceramics, General Researcher Program (Female Scientists), NRF
• Preparation and defect-chemical characterization of nitrogen-doped TiO₂, a promising photoelectrode material for water-splitting, Joint Research Program (Prof. Lerch, TU Berlin), NRF
• Comprehensive electrical characterization of bulk dielectric, grain boundary and electrode contact for understanding and improving MLCC characteristics, Center for Ceramic Passive Components, SNU, Samsung Electromechanics
• Universal role of dopants and crystallographic polarity in ZnO materials, General Researcher Program (New Faculty Members), NRF
• Impedance spectroscopy for electrochemical analysis of mixed conductors, New Faculty Member Project, JNU