Research

Research Overview

At the Energy Materials Science Laboratory (EMSL), we develop advanced materials for energy storage and conversion and investigate how they function under realistic operating conditions. Our research combines materials synthesis, electrochemical analysis, and operando synchrotron-based X-ray characterization to connect fundamental materials science with practical energy technologies.

Next-Generation Rechargeable Batteries

A major focus of our group is rechargeable battery research, spanning both lithium- and sodium-based systems. We study cathode and anode materials, interfacial chemistry, phase evolution, and degradation mechanisms that control energy density, rate capability, safety, and cycle life.

Our recent battery research includes:

① all-solid-state batteries,

② anode-free battery systems,

③ Prussian white cathodes,

④ single-crystal cathodes, and

⑤ high performance anode materials.

Through these studies, we aim to reveal the physicochemical principles that determine how our batteries operate, degrade, and can be improved through rational materials design.

Electrocatalysis for Sustainable Energy Conversion

We also investigate electrocatalysts for sustainable chemical conversion, with emphasis on electrochemical CO2 /CO reduction and water splitting. Our work explores how local coordination, electronic structure, composition, and surface chemistry influence catalytic activity, selectivity, and durability.

Our recent electrocatalysis research includes:

① electrochemical CO2 reduction reaction, 

② electrochemical water splitting,

③ single atom catalysts,

④ layered double hydroxides, and

⑤ intermetallic alloys.

By studying single-atom catalysts, metal alloy systems, and surface-controlled active materials, we seek to establish mechanism-based design principles for high performance electrocatalysis.

Operando Synchrotron X-ray Analyses

A defining feature of our lab is the use of synchrotron-based X-ray analyses as a core research platform. We employ X-ray diffraction (XRD), X-ray absorption fine structure (XAFS), and X-ray transmission microscopy (XTM) imaging to track structural and electronic changes in real time scale.

This operando and in situ approach in both battery and electrocatalysis field enables us to identify:

① phase transitions,

② oxidation-state changes,

③ local structural distortions,

④ interfacial heterogeneity, and

⑤ degradation pathways.

Research Environment

Our research is supported by a strong and active graduate research environment. Students in the group are trained through independent projects (e.g., fostering grants from NRF), collaborative research, advanced characterization, and international academic activities. By combining rigorous science with hands-on research experience, we aim to cultivate the next generation of researchers in battery science, electrocatalysis, and synchrotron X-ray characterization.