Dr. Hyunseung Kim

Hi! I am a Post-doctor in Applied Science Laboratory at KAIST, working under the supervision of Professor WooChul Jung. My research area is on understanding the reactions that occur at the interface of ionic solids (specifically oxides) and gases. The goal is to improve reaction kinetics for applications in chemical and electrochemical catalysis, such as fuel cells and electrolyzers. 

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ORCID: 0000-0002-1412-2979

Experience

• 2024.03.01. - Post-doctor at Applied Science Laboratory, KAIST

• 2023.01.03. - 04.30. Visiting scholar at Massachusetts Institute of Technology (Prof. Harry L. Tuller) 

Education

• 2020.02. - 2024.02.

Ph.D. Department of Materials Science and Engineering, KAIST

Thesis title: "Study on atomic-scale observation and control of surface cation segregation of perovskite oxides for energy conversion devices"

• 2018. 03. - 2020. 02. 

M.S. Department of Materials Science and Engineering, KAIST

Thesis title: "Electrochemical deposition of doped ceria for the performance improvement of thin-film solid oxide fuel cells"

• 2014. 03. - 2018. 02.

B.S. Department of Materials Science and Engineering, KAIST (Magna cum laude)

• 2011. 02. - 2014. 02.

Korea Science Academy of KAIST

Research Interests

• Gas/solid interface, perovskite oxides, surface cation segregation, exsolution, thin-film fabrication, pulsed laser deposition, solid oxide fuel cells

Publications

citations: 426, h-index: 10 (24.05.20.)

(submitted & in preparation)

• H. Kim et al., "An ideal surface reveals how active it is and why it degrades: atomically-flat Sr(Ti,Fe)O3-δ model thin film system - a case study" (under review)

• H. Kim et al., "Investigating the role of surface binary oxides on the surface oxygen exchange kinetics of conductive perovskite oxides" (under review)

• S. Nam+, J. Kim+, H. Kim+, and W. Jung*, "Surface Functionalizing for High-temperature Ceramic Fuel Cells Using Electrochemical Deposition Technique" (under review)

• J. Kim+, H. Kim+, S. Nam, Y. Choi*, and W. Jung*, "Exploring gas/solid interface reactions of solid oxide fuel cell electrodes via model thin film systems" (submitted)

• H. Kim et al., "Boosting the activity and stability of solid oxide fuel cell air electrode via topotactic fluorination" (in preparation)

• H. Kim+, Y. Hong+, S. Kim+ et al., "Controlling ex-solution behavior of Sr-deficient Sr(Ti,Fe,Ni)O3-δ via impregnation of anion dopants" (in preparation)

• Y. Hong+, H. Kim+, Y. B. Kim, S. Jeon, S. Kim, J. Lee, H. Sun, S. Nam, and W. Jung*, "Alkaline leaching: a facile strategy to improve the surface activity of air electrodes for solid oxide electrochemical cells" (in preparation)

• H. Kim et al., Enhanced phase stability of F-doped (Er,Bi)Ox electrolyte for low-temperature solid oxide fuel cells" (in preparation)

• H. Kim et al., "Liquid-based ambient-condition surface modification technique for enhanced solid oxide fuel cell air electrodes" (in preparation)

• H. Kim et al., "Excimer laser-driven ultrafast exsolution for enhancing solid oxide fuel cell air electrodes" (in preparation)

(as a first author)

• H. Sun+, H. Kim+, X. Xu, L. Fei, W. Jung*, and Z. Shao*, "Thin Films Fabricated by Pulsed Laser Deposition for Electrocatalysis", Renewables (2023), 1(1), 21-38. [click]

• J. Liu+, J. K. Kim+, Y. Wang+, H. Kim+, A. Belotti, B. Koo, Z. Wang, W. Jung* and F. Ciucci*, "Understanding and mitigating A-site surface enrichment in Ba-containing perovskites: A combined computational and experimental study of BaFeO3", Energy Environ. Sci. (2022), 15(10), 4069–4082. [click]

• J. Kim+, H. Kim+, S. Nam+, and W. Jung*, "전기화학 증착 기술과 고체산화물연료전지에의 응용" Ceramist (2021) 24(4), 411-423. [click]

• H. Kim, H. G. Seo, Y. Choi, D.-K. Lim and W. Jung*, "Cathodic electrochemical deposition: A new strategy to enhance the activity and stability of silver cathodes for thin-film solid oxide fuel cells" J. Mater. Chem. A (2020), 8(29), 14491–14497. [click]

(as a co-author)

• H. G. Seo*, H. Kim, W. Jung, and H. L. Tuller*, "Reversal of chronic surface degradation of Sr(Ti,Fe)O3 perovskite-based fuel cell cathodes by surface acid/base engineering", Appl. Catal. B: Environ. and Energy (in press) [click]

• S. Nam+, J. Kim+, H. Kim, S. Ahn, S. Jeon, Y. Choi*, B.-K Park*, and W. Jung*, "Revitalizing Oxygen Reduction Reactivity of Composite Oxide Electrodes via Electrochemically Deposited PrOx Nanocatalysts", Adv. Mater. (in press) [click]

• H. Sun+, X. Xu+, H. Kim, Z. Shao*, and W. Jung*, "Advanced electrocatalysts with unusual active sites for electrochemical water splitting", InfoMat (2023), e12494. [click]

• H. Sun+, L. Li+, Y. Chen+, H. Kim, X. Xu, D. Guan, Z. Hu, L. Zhang*, Z. Shao*, and W. Jung*, "Boosting ethanol oxidation by NiOOH-CuO nano-heterostructure for energy-saving hydrogen production and biomass upgrading", Appl. Catal. B: Environ. (2023), 325(15), 122388. [click]

• H. Sun, X. Xu, H. Kim, W. Jung, W. Zhou* and Z. Shao*, "Electrochemical Water Splitting: Bridging the Gaps Between Fundamental Research and Industrial Applications", Energy Environ. Mater. (2023), 6(5), e12441. [click]

• H. Sun, J. Liu, H. Kim, S. Song, L. Fei, Z. Hu, H. Lin, C. Chen, F. Ciucci* and W. Jung*, "Ni-Doped CuO Nanoarrays Activate Urea Adsorption and Stabilizes Reaction Intermediates to Achieve High-Performance Urea Oxidation Catalysts", Adv. Sci. (2022), 9(34), 2204800. [click]

• H. Sun, H. Kim, S. Song and W. Jung*, "Copper foam-derived electrodes as efficient electrocatalysts for conventional and hybrid water electrolysis", Mater. Reports Energy (2022), 2(2), 100092. [click]

• J. H. Kim, K. Jang, D.-K. Lim, S. Ahn, D. Oh, H. Kim, J. Seo, P.-P. Choi and W. Jung*, "Self-Assembled Nano-Composite Perovskites as Highly Efficient and Robust Hybrid Cathode for Solid Oxide Fuel Cell", J. Mater. Chem. A (2022), 10, 2496–2508. [click]

• H. Sun, J. Liu, G. Chen, H. Kim, S. Kim, Z. Hu, J. Chen, S. Haw, F. Ciucci* and W. Jung*, "Hierarchical Structure of CuO Nanowires Decorated with Ni(OH)2 Supported on Cu Foam for Hydrogen Production via Urea Electrocatalysis", Small Methods (2021), 6(1), 2101017. [click]

• N. Kim, M. Shin, S. Jun, B. Choi, J. Kim, J. Park, H. Kim, W. Jung, J.-Y. Lee, Y.-H. Cho and B. Shin*, "Highly Efficient Vacuum-Evaporated CsPbBr3 Perovskite Light-Emitting Diodes with an Electrical Conductivity Enhanced Polymer-Assisted Passivation Layer", ACS Appl. Mater. Interfaces (2021), 13, 37323–37330. [click]

• D.-K. Lim+, N. W. Kwak+, J.-S. Kim, H. Kim, B.-K. Kim, Y.-C. Kim* and W. Jung*, "Ni diffusion in ceria lattice: A combined experimental and theoretical study", Acta Mater. (2021) 219(15), 117252. [click]

• H. G. Seo+, S. Ji+, J. Seo, S. Kim, B. Koo, Y. Choi, H. Kim, J. H. Kim, T.-S. Kim and W. Jung*, "Sintering-resistant platinum electrode achieved through atomic layer deposition for thin-film solid oxide fuel cells", J. Alloys Compd. (2020), 835, 155347. [click]

Awards

• Yang-Song Researcher Award, Excellence Prize (24.04.17.) [click]

• BK21 FOUR Excellent Research Gold Prize (24.01.16.) [click]

• Outstanding Academic Presentation Award at "Next-Generation SOFC Research Leader Symposium", held at The 2023 Fall Meeting of The Korean Ceramic Society (23.10.18-20.) [click]

• Nano Research Campus Best Presentation Award at Nano Research Campus KAIST (23.09.08.) [click]

• KCers Best Poster Award at The 2021 Fall Meeting of The Korean Ceramic Society (21.11.03-05.) [click]

• Community Service Scholarship from KAIST (21.08.27.) [click]

• Samsung Electro-mechanics Ceramist Award at The 2021 Spring Meeting of The Korean Ceramic Society (21.06.16-18.) [click]

• Yang-Song Poster Award, Yang-Song Ceramography Award at The 2020 Fall Meeting of The Korean Ceramic Society (20.11.23-25.) [click]

• Oral Presentation Excellence Award at The 20th Japan-Korea Students’ Symposium (19.11.05-09.) [click]

• Best Oral Presentation Award at The 19th Korea-Japan Students’ Symposium (18.11.05-08.) [click]

Participation in International Events

• Oral presentation at Nano Research Campus KAIST (23.09.08.)

"Understanding surface Sr segregation of perovskite oxides through microscopic observations"

• Poster presentation at The 21st Japan-Korea Students' Symposium (22.11.17-18.)

"Preparation of an ideal surface reveals how active it is and why it degrades - SrTi0.5Fe0.5O3-δ as a case study"

• Oral presentation at The 23rd International Conference on Solid State Ionics (2022.07.18-22.)

"Quantitative correlation of surface cation segregation and surface activity of Sr(Ti,Fe)O3-δ through microscopic observation

• Poster presentation at The 2022 Nano Korea Symposium (22.07.06-08.)

"Topotactic fluorination boosts the surface activity and stability of solid oxide fuel cell air electrodes"

• Poster presentation at 2020 Asian SOFC Symposium (21.11.07-09.)

"Correlating Microscopic Observation and Characterization on Surface Sr Segregation of Sr(Ti,Fe)O3-δ Thin-films"

• Poster presentation at The 8th International Congress on Ceramics (ICC8) (21.04.25-30.)

"Correlation of surface cation segregation and activity of atomically-flat Sr(Ti,Fe)O3-δ thin-film for solid oxide fuel cell electrodes"

• Oral presentation at The 20th Japan-Korea Students’ Symposium (19.11.05-09.)

"Cathodic Electrochemical Deposition: A New Strategy to Dramatically Enhance the Activity and Stability of Silver Cathodes for Solid Oxide Fuel Cells"

• Poster presentation at The 22nd International Conference on Solid State Ionics (19.06.16-21.)

"Highly Active and Robust Silver Cathodes Treated by Electrochemically-Driven (Pr, Ce)O2-δ Overcoating for Thin-Film Solid Oxide Fuel Cells"

• Poster presentation at The 2019 Nano Korea Symposium (19.07.02-05.)

"Highly Active and Robust Silver Cathodes Treated by Electrochemically-Driven (Pr, Ce)O2-δ Overcoating for Thin-Film Solid Oxide Fuel Cells"

• Oral presentation at The 19th Korea-Japan Students’ Symposium (18.11.05-08.)

"Two-step (Pr,Ce)O2-δ coating on nanoporous platinum cathode with improved performance and stability for low-temperature solid oxide fuel cells

Participation in Domestic Events

• Oral presentation at The 2024 Spring Meeting of The Korean Ceramic Society (24.04.17-19.)

"Revealing the Critical Role of Metal Oxide Infiltrate in Regulating Surface Oxygen Exchange Activity of Perovskite Oxides"

• Oral presentation at The 2023 Fall Meeting of The Korean Ceramic Society (23.10.18-20.)

"(De-)activation of surface oxygen exchange activity of perovskite oxides by metal oxide infiltration: Sr(Ti,Fe)O3-δ as case-study"

• Poster presentation at The 2nd Korean SOC Symposium for Carbon Neutrality Initiatives (23.07.11-12.)

"Unraveling the Quantitative Correlation between Surface Cation Segregation and Surface Activity in Sr(Ti,Fe)O3-δ through Microscopic Observation"

• Oral presentation at 수소에너지 연구 협력 하계 워크샵 (22.07.01-02.)

"Strategies to investigate and improve perovskite oxide surfaces"

• Oral presentation at The 2022 Spring Meeting of The Korean Ceramic Society (22.04.13-15.)

"Microscopic investigation of surface Sr segregation of Sr(Ti,Fe)O3-δ thin-films"

• Poster presentation at The 2021 Fall Meeting of The Korean Ceramic Society (21.11.03-05.)

"Topotactic chlorination as a new strategy to enhance the surface activity of solid oxide fuel cell air electrodes"

• Poster presentation at The 2021 Spring Meeting of The Korean Ceramic Society (21.06.16-18.)

"Microscopic observation and characterization on surface cation segregation of Sr(Ti,Fe)O3-δ"

• Poster presentation at The 2020 Fall Meeting of The Korean Ceramic Society (20.11.23-25.)

"Cathodic electrochemical deposition of doped-ceria as a strategy to enhance the activity and stability of silver cathodes for thin-film solid oxide fuel cells"

• Oral presentation at The 2020 Spring Meeting of The Korean Ceramic Society (20.07.06-09.)

"Cathodic electrochemical deposition of (Pr,Ce)O2-δ to enhance the activity and stability of silver cathodes for thin-film solid oxide fuel cells"

• Poster presentation at The 2019 Fall Meeting of The Korean Ceramic Society (19.11.13-15.)

"A simple electrochemically-driven (Pr, Ce)O2-δ overcoating to enhance the activity and thermostability of silver cathodes for thin-film solid oxide fuel cells"

• Poster presentation at The 2019 Spring Meeting of The Korean Ceramic Society (19.04.10-12.)

"Highly Active and Robust Silver Cathodes Treated by Electrochemically-Driven (Pr, Ce)O2-δ Overcoating for Thin-Film Solid Oxide Fuel Cells"