Korea University · Materials Science
Professor Ji-Won Son's research lab specializes in advanced materials and thin-film technologies for sustainable energy conversion, with a primary focus on solid oxide and protonic ceramic fuel cells. The lab develops nanostructured electrolytes, anodes, and cathodes using pulsed laser deposition and template-assisted fabrication to enhance ionic conductivity, reduce operating temperatures, and improve device efficiency. Key research directions include thin-film electrolyte integration, ammonia-fueled direct operation, and the optimization of cobalt- and nickel-based electrocatalysts for low-temperature fuel cell applications.
Figures are computed from collected data and may differ slightly.
Abstract Micro‐solid oxide fuel cells ( μ ‐SOFCs) are fabricated on nanoporous anodic aluminum oxide (AAO) templates with a cell structure composed of a 600‐nm‐thick AAO free‐standing membrane embedded on a Si substrate, sputter‐deposited Pt electrodes (cathode and anode) and an yttria‐stabilized zirconia (YSZ) electrolyte deposited by pulsed laser deposition (PLD). Initially, the open circuit voltages (OCVs) of the AAO‐supported μ ‐SOFCs are in the range of 0.05 V to 0.78 V, which is much lower
Abstract This study demonstrates the effectiveness of using thin‐film electrolytes to enhance protonic ceramic fuel cells (PCFCs). The material tested in this study is yttrium‐doped barium cerate‐zirconate (BCZY), which is a representative electrolyte material of PCFCs. The thickness of the electrolyte membrane is as small as 1 µm and designed to minimize ohmic loss in proton transport pathways. Integration of this thin BCZY electrolyte is attempted on a multilayered anode comprised of two‐step
We proposed a facile and reliable fabrication method by implementing a novel cell platform and thin-film-deposition based protonic ceramic fuel cells.
Ammonia is a promising carbon-free hydrogen carrier. Owing to their nickel-rich anodes and high operating temperatures, solid oxide fuel cells (SOFCs) can directly utilize NH<sub>3</sub> fuel-direct-ammonia SOFCs (DA-SOFCs). Lowering the operating temperature can diversify application areas of DA-SOFCs. We tested direct-ammonia operation using two types of thin-film SOFCs (TF-SOFCs) under 500 to 650°C and compared these with a conventional SOFC. The TF-SOFC with a nickel oxide gadolinium-doped c
The physical and microstructural properties of NiO‐ and Ni‐YSZ composite thin films deposited by pulsed‐laser deposition have been investigated for nanoporous anode electrodes of SOFC applications. An NiO‐YSZ thin film which was deposited at room temperature and postannealed at 700°C exhibited a fine porous structure, but electrical conduction was not detected when reduced. On the other hand, 700°C‐deposited NiO‐YSZ films showed appropriate crystallinity and exhibited electrical conductivity aft
Abstract For investigating the direct applicability of highly active cobalt containing cathodes on YSZ electrolytes at a lower processing and operating temperature range ( T ≤ 650 °C), we fabricated a thin film lanthanum strontium cobalt oxide (LSC) cathode on an yttria stabilised zirconia (YSZ)‐based solid oxide fuel cell (SOFC) via pulsed laser deposition (PLD). Its electrochemical performance (5.9 mW cm –2 at 0.7 V, 650 °C) was significantly inferior to that (595 mW cm –2 at 0.7 V, 650 °C) of
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