Dr. Junbeom Park (j.park at fz-juelich.de)

In-situ Electron Microscopy group
Low Temperature Water Electrolysis department
Institute of Energy and Climate - Fundamental Electrochemistry (IEK-9)
Forschungszentrum Juelich GmbH, Germany
Google scholar | ORCID | Gitlab

Hello, As a material engineer, I have an interests on improving the material and process via investigating the fundamental mechanism. My experience began from material synthesis (carbon nanotube fiber via floating catalyst method) and material analysis (morphology, structural arrangement, crystallinity and mechanical properties). After that, I shifted to the in-situ TEM technique, which enables to investigate the variety of material's properties (ex. phase, crystallinity, composition) or process (ex. agglomeration, electrodeposition) related to environmental conditions (ex. temperature, gas pressure, electricity). Additionally, I started image and data processing (ex. segmentation, edge detection) to extract more information from in-situ results.

CV

Curriculum_Vitae_Dr._Junbeom_Park.pdf

Research experience

Analysis of reaction mechanisms via in-situ TEM

• Visualization of Zn dendritic growth by electrodeposition via image processing (in preparation)
• Tracking the growth Cu nanoparticles during electrodeposition cycles via image processing link
• Technical development to obtain high resolution liquid phase in-situ TEM results link
• Catalytic activity and agglomeration of catalyst particles near reaction temperature (around 1000 oC) link

Analysis of structure and mechanical properties of material

• Intermediate formation of LATP/LFP (solid electrode/electrolyte) during sintering link
• Arrangement of graphitic structure of PAN-based carbon fiber during carbonization link
• Structural evolution of industry-scaled carbon nanotube yarn during densification link
• Mathematical model to relate between hierarchical structure and mechanical behavior of carbon nanotube fiber link
• The effect of hierarchical structure on linear density measurement link

Fabrication of carbon nanotube fiber via floating catalyst method link

• Production parameters: Ratio of reactant, Temperature, Gas composition, Spinning rate
• Qualification methods: Strength (Tensile test), Morphology (TEM, SEM), Crystallinity (Raman analysis)