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Title

In Situ and Multimodal Transmission Electron Microscopy for Energy Materials 

Speaker

Dr. Aram Yoon, Researcher in the Structure and Imaging group at the Shell Energy Transition Center

*Education

- 2013-2019  Ph.D., Materials Science and Engineering ,University of Illinois at Urbana Champaign 

- 2010-2012  M.S., Materials Science and Engineering, Seoul National University  

- 2006-2010  B.S., Materials Science and Engineering, Seoul National University  

*Professional Experience

2024-current  Researcher in Structure and Imaging Group, Analytical Department, Shell Global Solutions International B.V., Netherland 

2020-2023     Post-doctoral Researcher, Fritz Haber Institut der Max Planck Gesellschaft, Germany 

Biography

Dr. Aram Yoon is a researcher in the Structure and Imaging group at the Shell Energy Transition Center in Amsterdam. Her research focuses on uncovering the atomic basis of functional materials, particularly establishing correlations between structure and chemical reactions to develop advanced catalysts. To achieve this goal, she employs an interdisciplinary approach that leverages the advanced capabilities of electron microscopy techniques to gain a quantitative understanding of the local structures, kinetics, and thermodynamics of redox reactions on nanomaterials. 

Prior to joining Shell, she obtained her B.S. and M.S. in Materials Science and Engineering from Seoul National University in South Korea, and her Ph.D. in Materials Science and Engineering from the University of Illinois at Urbana- Champaign in 2019. After completing her Ph.D., she moved to Germany on an Alexander von Humboldt fellowship to conduct her postdoctoral research in the Department of Interface Science at the Fritz Haber Institute of the Max Planck Society. She joined Shell in January 2024 to implement multiscale electron microscopy for catalyst studies, aiming for scaled-up applications in the energy industry. 

| Date | Thursday, January 9th, 2025

| Time | 16:00~ 

| Venue | 33동 222호(DB 세미나실)

[Abstract]

Transmission Electron Microscopy (TEM) has become an indispensable tool for studying the relationships between structure and properties in functional materials. Beyond its role as a visualization technique, in situ TEM serves as a novel platform for material testing, enabling real-time observations that reveal how materials behave under operational conditions. Techniques such as gas-heating TEM and electrochemical cell TEM allow for the study of catalysts, battery materials, and other energy-relevant systems, capturing dynamic  changes  at  the  nanoscale.  These  methods  are  particularly  valuable  for  investigating transformations at solid-solid, solid-liquid, and gas-solid interfaces—key processes that underpin catalytic and energy storage performance. 

This presentation will showcase the use of in situ TEM to explore the behavior of transition metal oxide nanocrystals during high-temperature reduction and during electrochemical reactions like CO2 and nitrate reduction.  By  observing  structural  evolution  and  phase  transitions  in  real-time  under  thermal  and electrochemical conditions, we gain a deeper understanding of these systems. Additionally, I will discuss efforts to complement TEM with multimodal approaches, including image simulation and screening techniques to link structural information with theoretical models, as well as X-ray absorption microscopy and  spectroscopy  to  connect  nanoscale  heterogeneity  with  material  performance,  offering  a  more comprehensive understanding of structure-property relationships. These examples highlight the critical role of TEM in advancing nanoscience, improving the design of energy conversion and storage materials, and supporting the broader pursuit of sustainable and clean energy technologies. 

| Host | 김미영 교수 (02-880-9239)