UST Student

Thermal engineering, Supercritical CO2 power generation, Heat pump, Thermal energy conversion

- Optimization and Operation Technology Development of Supercritical CO2 Power Generation System </br>- Development of Heat Pump System Using Sea Water </br>- Development of the Optimization Technology for Network Plant using Unutilized Energy Resources </br>- Development of High Performance Heat Pump System using River Water as a Heat Source </br>- Development of Hybrid Heat Pump by using Industrial Waste Heat

- Optimal allocation of heat exchangers in a Supercritical carbon dioxide power cycle for waste heat recovery, Energy Conversion and Management, 2019. </br>- The effect of storage temperature on the performance of a thermoelectric energy storage using a transcritical CO2 cycle, Energy, 2014. </br>- Potential to enhance performance of seawater-source heat pump by series operation, Renewable Energy, 2014. </br>- A comparative study of power optimization in low-temperature geothermal heat source driven R125 transcritical cycle and HFC organic Rankine cycles, Renewable Energy, 2013. </br>- Power enhancement potential of a mixture transcritical cycle for a low-temperature geothermal power generation, Energy, 2012. </br>- Power-based performance comparison between carbon dioxide and R125 transcritical cycles for a low-grade heat source, Applied Energy, 2011.

UST Student,Academic Cooperation Course

CO2 Capture and Utilization Technology

Development of ultra clean pretreatment key technology of organic waste-derived gas of organic waste-derived gas

- Solubility of carbon dioxide in amine-functionalized ionic liquids: Role of the anions, Chemical Engineering Journal, 193-194, 2012 </br>- Development of pilot WGS/Muti-layer membrane for CO2 capture", Chemical Engineering Journal, 207-208, 521-525, 2012 </br>- Adsorption of CO2 by iron-exchanged heteropolyacid Fe1.5PMo12O40 supported on mesoporous cellular foams, J Porous Materials, 23, 1207？1215, 2016 </br>- Effects of Transition Metal Oxide Catalysts on MEA Solvent Regeneration for Post-combustion Carbon Capture Process” ACS Sustainable Chem. Eng., 5, 5862？5868, 2017 </br>- Performance and Mechanism of Metal Oxide Catalyst-Aided Amine Solvent Regeneration, ACS Sustainable Chem. Eng., 6, 1209-12087, 2018 </br>- Modeling of CO2 solubility of an aqueous polyamine solvent for CO2 capture, Chemical Engineering Science, 204, 140-150, 2019 </br>- Efficient Ag2O？Ag2CO3 catalytic cycle and its role in minimizing the energy requirement of amine solvent regeneration for CO2 Capture, Sustainable Chemistry & Engineering, 7, 10234-10240, 2019 </br>- Selective removal of SO2 from coal-fired flue gas by alkaline solvents using a membrane contactor, Chemical Engineering & Processing, 147, 107772, 2020 </br>- Catalytic activity of facilely synthesized mesoporous HZSM？5 catalysts for optimizing the CO2 desorption rate from CO2-rich amine solutions”, Chemical Engineering Journal, 389, 123439, 2020 </br>- Practical and inexpensive acid-activated montmorillonite catalysts for energy-efficient CO2 capture”, Green Chemistry, 22, 6328-6333, 2020 </br>

Academic Cooperation Course

- DERs control and integration </br>- DER/Microgrid, ESS, HIL

- Development of total operating system and advanced SW technology for multiple application ESS with improved battery lofe and control modularization </br>- Cyber Physical System Technologies to interconnect Dostributed Energy Resources for RE3020 </br>- Design of power system for PEM electrolyzer with renewable energy

- Digital adaptive frequency modulation for bidirectional DC-DC converter </br>- Distributed control strategy for autonomous operation of hybrid ac/dc microgrid </br>- Single-Stage Buck-derived LED driver with improved efficiency and power factor using current path control switches </br>- Current sensor-less state-of-charge estimation algorithm for lithium-ion batteries utilizing filtered terminal voltage

UST Student,Academic Cooperation Course

고온수전해-연료전지 고체산화물 셀/스택, 에너지 저장 및 변환 응용을 위한 전기화학 소재

-고체산화물 연료전지-수전해 스택 시스템 개발 </br>-과산화수소 생산을 위한 전기화학 소재 셀 개발 </br>-차세대 수계아연전지 응용을 위한 양극/음극 소재 개발

1) Segi Byun el at., “Ti3C2Tx MXene as a growth template for amorphous RuOx in carbon nanofiber-based flexible electrodes for enhanced pseudocapacitive energy storage” NPG Asia Materials, 15(1), 29, (2023). </br>2) Segi Byun et al., “Defective lithium titanate oxide with stable cycling over a wide voltage window“, Applied Surface Science, 614, 156134 (2023). </br>3) Segi Byun el at., “Reduced graphene oxide as a charge reservoir of manganese oxide: Interfacial interaction promotes charge storage property of MnOx-based micro-supercapacitors," Chemical Engineering Journal, 135569, (2022). </br>4) Segi Byun et al., “High-rate electrospun Ti3C2Tx MXene/carbon nanofiber electrodes for flexible supercapacitors," Applied Surface Science, 556, 149710 (2021). </br>5) Segi Byun et al., “Aging of a vanadium precursor solution: Influencing material properties and photoelectrochemical water oxidation performance of solution-processed BiVO4 photoanodes," Advanced Functional Materials, 30 (18), 1806662 (2020).

Post-doctoral Researcher

- PEMFC stack and System Technology </br>- FVM, FEM and MD simulation

- Development of hydrogen fuel cell core technologies for short period change of electric power </br>- Development of fuel cell separator and stack design and manufacturing for high fluctuation of electrical power load

- Application of Metal Foam as a Flow Field for PEM Fuel Cell Stack (Fuel Cells, Volume18, Issue2, April 2018, Pages 123-128) </br>- Study on Polymer Electrolyte Fuel Cells with Nonhumidification Using Metal Foam in Dead-Ended Operation (Energies 2020, 13(5)) </br>- Performance of unit PEM fuel cells with a leaf-veinsimulating flow field-patterned bipolar plate (international journal of hydrogen energy 44 (2019) 24036-24042) </br>- PEMFC modeling based on characterization of effective diffusivity in simulated cathode catalyst layer (international journal of hydrogen energy 42 (2017) 13226-13233)

UST Student

SOFC cell stack, materials and system technologies, including SOC, proton conducting technoogies.

- Development of highly durable SOFC stack technology under simultaneous thermal and load cycling </br>- Key technologies for next-generation solid oxide fuel cells for on-site trigeneration systems in building energy networks </br>- Development of Metallic Interconnect Materials and Manufacturing Process for High-Temperature Fuel Cell </br>- Development of low-cost high-performance core materials for building application SOFCs </br>- The Development nof Process Technology of Highly Reliable SOFC for Distributed Power Generation

1. High-Performance Solid Oxide Fuel Cell with an Electrochemically Surface-Tailored Oxygen Electrode, Beom-Kyeong Park, Seung-Bok Lee, Tak-Hyoung Lim, Rak-Hyun Song, Jong-Won Lee*, ChemSusChem, 11, pp.2620-2627 (2018). </br>2. Effects of applied current density and thermal cycling on the degradation of a solid oxide fuel cell cathode, Muhammad Zubair Khan, Muhammad Taqi Mehran, Rak-Hyun Song*, Seung-Bok Lee, Tak-Hyoung Lim, International Journal of Hydrogen Energy, 43, pp. 12346-12357 (2018). </br>3. High-performance nanofibrous LaCoO3 perovskite cathode for solid oxide fuel cells fabricated via chemically assisted electrodeposition, Saeed Ur Rehman, Rak-Hyun Song, Tak-Hyoung Lim, Seok-Joo Park, Jong-Eun Hong, Jong-Won Lee, Seung-Bok Lee, Journal of Materials Chemistry A, 6, pp.6987-6996 (2018) </br>4. Efficient and robust ceramic interconnects based on a mixed-cation perovskite for solid oxide fuel cells, Je-Lin Choi, Beom-Kyeong Park, Seung-BokLee, Rak-HyunSong, Jong-WonLee, Ceramics International, 45, pp. 4902-4908 (2019). </br>5. Nano-fabrication of a high-performance LaNiO3 cathode for solid oxide fuel cells using an electrochemical route, Saeed Ur Rehman, Ahmad Shaur, Rak-Hyun Song, Tak-Hyoung Lim, Jong-Eun Hong, Seok-Joo Park, Seung-Bok Lee*, J. Power Sources, 429, pp. 97-104 (2019). </br>6. Highly durable nano-oxide dispersed ferritic stainless steel interconnects for intermediate temperature solid oxide fuel cells, Muhammad Taqi Mehran, Tae-Hun Kim, Muhammad Zubair Khan, Seung-Bok Lee, Tak-Hyoung Lim, Rak-Hyun Song*, Journal of Power Sources, 439, pp.227109- (2019). </br>7. Thermally self-sustaining operation of tubular solid oxide fuel cells integrated with a hybrid partial oxidation reformer using propane, Jong-Eun Hong, Mushtaq Usman, Seung-Bok Lee, Rak-Hyun Song*, Tak-Hyoung Lim*, Energy Conversion and Management, 189, pp. 132-142 (2019). </br>8. Performance characteristics of a robust and compact propane-fueled 150 W-class SOFC power-generation system, Muhammad Taqi Mehran, Sung-Woo Park, Jonghwan Kim, Jong-Eun Hong, Seung-Bok Lee, Seok-Joo Park, Rak-Hyun Song, Joon- Hyung Shim, Tak-Hyoung Lim*, International Journal of Hydrogen Energy, 44, pp. 6160-6171 (2019). </br>9. Scaling up syngas production with controllable H2/CO ratio in a highly efficient, compact, and durable solid oxide coelectrolysis cell unit-bundle, Dong-YoungLee. Muhammad Taqi Mehran, JonghwanKim, SangchoKim, Seung-BokLee, Rak-HyunSong, Eun-YongKo, Jong-EunHong, Joo-YoulHuh, Tak-HyoungLim*, Appled Energy, 257, pp. 114036 (2020). </br>10. Effect of applied current density on the degradation behavior of anode-supported flat-tubular solid oxide fuel cells, Muhammad Zubair Khan, Rak-Hyun Song*, Amjad Hussain, Seung-Bok Lee, Tak-Hyoung Lim, Jong-Eun Hong, Journal of the European Ceramic Society, 40, pp.1407-1417 (2020). </br>11. Hybrid Electrochemical Deposition Route for the Facile Nanofabrication of a Cr-Poisoning-Tolerant La(Ni,Fe)O3-δ Cathode for Solid Oxide Fuel Cells, Ahmad Shaur, Saeed Ur Rehman, Hye-Sung Kim, Rak-Hyun Song, Tak-Hyoung Lim, Jong-Eun Hong, Seok-Joo Park, and Seung-Bok Lee*, ACS Applied Materials & Interfaces, 12, pp. 5730-5738 (2020). </br>12. Facile surface modification of LSCF/GDC cathodes by epitaxial deposition of Sm0.5Sr0.5CoO3 via ultrasonic spray infiltration, You-Hwa Song, Saeed Ur Rehman, Hye-Sung Kim, Ho-Seon Song, Rak-Hyun Song, Tak-Hyoung Lim, Jong-Eun Hong, Seok-Joo Park, Joo-Youl Huh, Seung-Bok Lee*, Journal of Materials Chemistry A, 8, pp. 3967-3977 (2020).

Academic Cooperation Course,Training Student

Advanced rechargeable battery

- Fundamental study for the development of Gwang-ju Bioenergy R&D Center </br>- Technology development for RFB materials/system design and biocoal/gas production </br>- Development of localization technology for polymer binder core material for small type lithium ion battery positive electrode </br>- Mnnufacturing technology develpment on composite core materials and electrode with high energy density for ceramic rechageable batteries

- High-voltage cathode materials by combustion-based preparative approaches for Li-ion batteries application,Journal of Power sources 2020, 472, 228368 </br>- Uniform Carbon Coated Na 3 V 2 (PO 4 ) 2 O 2x F 3-2x Nanoparticles for Sodium Ion Batteries as Cathode, ACS Sustainable Chem. Eng. 2019, 7, 23, 18826？18834 </br>- Phase-pure Na3V2(PO4)2F3 embedded in carbon matrix through a facile polyol synthesis as a potential cathode for high performance sodium-ion batteries, Nano Research 2019, 12(4), 911-917 </br>- Sodium manganese oxide electrodes accompanying self-ion exchange for lithium/sodium hybrid ion batteries, Electrochimica Acta, 2018, 261, 42- 48 </br>- Monoclinic-Orthorhombic Na 1.1 Li 2.0 V 2 (PO 4 ) 3 /C Composite Cathode for Na + /Li + Hybrid-ion Batteries, Chemistry of Materials, 2017, 29,6642-6652

Academic Cooperation Course

Crystalline silicon solar cell

- High efficiency Si solar cell technology </br>- Technology of passivation contacted Si solar cell fabrication </br>- Perovskite/silicon tandem solar cell </br>

1. Interface analysis of ultrathin SiO2 layers between c-Si substrates and phosphorus-doped poly-Si by theoretical surface potential analysis using the injection-dependent lifetime, Progress in Photovoltaics, 2020 </br>2. Analysis of the negative charges injected into a SiO2/SiNx stack using plasma charging technology for field-effect, Progress in Photovoltaics, 2020 </br>3. Correlation between the open-circuit voltage and recombination loss at metal-silicon interfaces of crystalline silicon solar cells, Solar Energy Materials and Solar Cells, 2020 passivation on a boron-doped silicon surface </br>4. Formation and suppression of hydrogen blisters in tunnelling oxide passivating contact for crystalline silicon solar cells, Scientific Reports, 2019 </br>5. Wet Chemical Oxidation to Improve Interfacial Properties of Al2O3/Si and Interface Analysis of Al2O3/SiOx/Si Structure Using Surface Carrier Lifetime Simulation and Capacitance-Voltage Measurement, Energies, 2020 </br>6. Comparison of passivation properties of plasma-assisted ALD and APCVD deposited Al2O3 with SiNx capping, Solar Energy Materials and Solar Cells, 2020

UST Student,Academic Cooperation Course,Training Student

Polymer Electrolyte Membrane, Ionomer

○ Development of electrolyte membrane and membrane-electrode assembly for next-generation hydrogen electric vehicles </br>○ Development of Technologies for Co-electrolysis of CO2 and Low-grade By-products for the Production of Valuable Chemicals </br>○ Development of key materials for anion exchange membrane water electrolyzer and fuel cell </br>○ Research for low cost, high efficiency and stability PEM water electrolysis via low iridium loading electrode development </br>○ Development of large-area SOFC single cell and polymer ionomers for high temperature PEMFC with high performance and durability for hydrocarbon fuels </br>○ Development of materials technology for MEA of PEMFC for power generation with performance of 300mA/cm2@0.8V and durability of 8μV/h for expansion of urban power plants

○ Synthetic Approaches for Poly (Phenylene) Block Copolymers via Nickel Coupling Reaction for Fuel Cell Applications, Polymers, 2020. </br>○ Synthetic approaches for advanced multi-block anion exchange membranes, RSC Advances, 2019. </br>○ Analysis of cerium-composite polymer-electrolyte membranes during and after accelerated oxidative-stability test, Journal of Power Sources, 2018. </br>○ Hydrocarbon-Based Polymer Electrolyte Membranes: Importance of Morphology on Ion Transport and Membrane Stability, Chemical Reviews, 2017. </br>○ Nanocrack-regulated self-humidifying membranes, Nature, 2016.

Post-doctoral Researcher,UST Student

Next generation solar cells

- Perovskite based tandem solar cells </br>- Multi-functional thin film solar cells

“Na-Mediated Stoichiometry Control of FeS2 Thin Films: Suppression of Nanoscale S-Deficiency and Improvement of Photoresponse”, ACS Appl. Mater. Interfaces 2019, 11, 43244-43251. </br>“Na­Induced Conversion of a Notorious Fine­Grained Residue Layer into a Working Absorber in Solution­Processed CuInSe2 Devices”, Solar RRL (2019) 1900260. </br>“Role of Na in solution-processed CuInSe2 (CISe) devices: A different story for improving efficiency”, Nano Energy 48 (2018) 401-412. </br>“An amorphous Cu-In-S nanoparticle-based precursor ink with improved atom economy for CuInSe2 solar cells with 10.85% efficiency”, Green Chem. 19 (2017) 1268-1277.