Juyoung Oh
Seoul National University
Juyoung Oh is a postdoctoral researcher and completed her doctoral degree in aerospace engineering from Seoul National University, where she was honored with an outstanding doctoral dissertation award. Juyoung’s research centers around the combustion thermodynamic analysis of metal-added energetic materials (EM). Her goals include uncovering:
1. The prediction of lifetime of EMs stored for extended periods.
2. Strategies to mitigate the thermal runaway of energy storage systems, such as lithium-ion batteries.
3. The development of renewable energy carriers composed of metal particles.
Her research contributes to providing a fundamental understanding of the critical aging effects of EMs used in aerospace propulsion systems. Juyoung’s contributions encompass eight publications and four best presentation prizes at conferences.
Looking ahead, Juyoung is committed to investigating the metal-based energy carriers as an alternative to fossil fuels. She is passionate about the ongoing exploration of her field and welcomes opportunities for collaboration. Contact Juyoung at 5_ju0@snu.ac.kr!
Metal-based Energetic Materials: Experimental Investigation of the Effects of Aging and the Changes in Thermochemical Properties on Chemical Reaction Kinetics
This thesis presents an in-depth study of the aging process of metal-based energetic materials and the identification of the fundamental causes behind the thermal runaway of energy storage systems (ESS). In the context of aging-related research, we employed energetic materials composed of titanium (Ti), zirconium (Zr), tungsten (W), and magnesium (Mg). For the ESS research, we investigated latent thermal energy storage (TES) materials and lithium-ion batteries (LIB). This study has facilitated the expansion of their effective utilization through various experimental techniques. In the course of the aging research, we discovered general aging effects on the chemical composition of the energetic materials, such as pre-oxidation of metals and prior decomposition of the oxidizer. Furthermore, we described hygrothermal aging effects on chemical reaction kinetics and the aging mechanism, providing a novel perspective. Shifting to ESS-related research, we confirmed the compatibility between phase change materials (PCM) and heat transfer fluids (HTF). Additionally, we introduced the groundbreaking idea that under specific conditions, a thermal reaction akin to gunpowder combustion can occur, leading to thermal runaway. Moreover, our findings revealed that subjecting high-nickel LIBs to a temperature of 50℃ during charging can trigger an exothermic reaction between the anode materials and the electrolyte, thereby inducing thermal runaway. Thus, this study not only enhances the comprehension of aging effects on energetic materials and the intricate factors driving thermal runaway in ESS but also charts new avenues for their enhanced utilization and safety considerations. The collective insights amassed here pave the way for further exploration, innovation, and advancement in the fields of energetic materials and energy storage systems.
