Seoul National University · Engineering
Professor Kyung Hyun Ahn's research lab specializes in the rheology and processing of complex suspensions and nanocomposites, with a strong focus on energy storage materials such as high-nickel NMC-based battery electrodes. The lab investigates the dispersion behavior, structural evolution, and stability of electrode slurries under various mixing and storage conditions, aiming to optimize coating processes and enhance battery performance. Key research directions include the role of binders like PVDF in slurry rheology, the kinetics of nanoclay dispersion in polymer blends, and the mechanical effects of shear stress on biological cells and materials. The lab combines advanced rheological measurements with microstructural characterization to address industrial challenges in battery manufacturing and polymer nanocomposite development.
Figures are computed from collected data and may differ slightly.
A binder plays a critical role in dispersion of coating liquids and the quality of coating. Poly(vinylidene fluoride) (PVDF) is widely used as a binder in cathode slurries; however, its role as a binder is still under debate. In this paper, we study the role of PVDF on the rheology of cathode battery slurries consisting of Li(Ni<sub>1/3</sub>Mn<sub>1/3</sub>Co<sub>1/3</sub>)O<sub>2</sub> (NCM), carbon black (CB) and N-methyl-2-pyrrolidone (NMP). Rheology and microstructure of cathode slurries ar
Abstract The addition of organically modified layered silicates (organoclay) to highly immiscible polypropylene/polystyrene, PP/PS, blends leads to a significant change in blend morphology and rheology. In this study, the kinetics for morphological development of the blend nanocomposites was studied by two mixing methods (internal batch mixing and continuous mixing), with a focus on the mechanism of dispersion of the silicate layers and its dependence on mixing conditions. Through the use of a t
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