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Korea Institute of Science and Technology (KIST)
Hydrogen Energy Materials Research Center
Solid State Energy Materials & Systems (SSEMS)

(5, Hwarang-ro 14-gil Seongbuk-gu Seoul, 02792 Republic of Korea)

We develop protonic ceramic electrochemical platforms for energy–chemical conversion.
Grounded in solid-state ionics, electrochemistry, and ceramic processing.

news

Jan 6, 2026 Announcement: Recruiting (2026) [link]
Jan 2, 2026 Our new website is now live. :smile:


selected publications

  1. 2026_S_Choi_NatComm.png
    Dynamics of dislocation formations and their impacts on exsolution in Ru-doped perovskite oxide
    Sungwook Choi†, Younghwan Lim†, Puspendu Guha, Hayoung Kim, Jaeseung Kim, Sungwon Kim, Ross Harder, Wonsuk Cha, Hoyoung Suh, Jinseok Ryu, Sungeun Yang, Ho-Il Ji*, Deok-Hwang Kwon*, and Hyunjung Kim*
    Nature Communications, 2026
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  2. 2026_S_Kim_EES.png
    Elucidatin the Proton-Coupled Oxygen Reduction Pathway in Protonic Ceramic Fuel Cells
    Seulchan Kim†, Dogeun Yoon†, Jinwoong Chae, Hyeonwoo Kim, Jongsup Hong, Ji-Won Son, Jong-Ho Lee, Sungwoo Kang, and Ho-Il Ji*
    Energy & Environmental Science, 2026
    HTML Press
  3. 2024_J_Kim_AEM.png
    Dual-Phase Reaction Sintering for Overcoming the Inherent Sintering Ability of Refractory Electrolytes in Protonic Ceramic Cells
    Junseok Kim, Jiwon Yun, Wanjae Lee, Do-Hyeong Kim, Puspendu Guha, Jin-Ha Hwang, Deok-Hwang Kwon, Sungeun Yang, Jong-Ho Lee, Kyung Joong Yoon, Ji-Won Son, Sahn Nahm, Sihyuk Choi*, and Ho-Il Ji*
    Advanced Energy Materials, 2024
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  4. 2022_H_An_ACSEL.png
    An Unprecedented Vapor-Phase Sintering Activator for Highly Refractory Proton-Conducting Oxides
    Hyegsoon An, Seunghyeok Im, Junseok Kim, Byung-Kook Kim, Ji-Won Son, Kyung Joong Yoon, Hyoungchul Kim, Sungeun Yang, Hyungmook Kang*, Jong-Ho Lee*, and Ho-Il Ji*
    ACS Energy Letters, 2022
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  5. 2021_J_Kim_SciAdv.png
    Naturally diffused sintering aid for highly conductive bilayer electrolytes in solid oxide cells
    Junseok Kim, Seunghyeok Im, Seol Hee Oh, Ji Yeong Lee, Kyung Joong Yoon, Ji-Won Son, Sungeun Yang, Byung-Kook Kim, Jong-Heun Lee, Hae-Weon Lee, Hae-Weon Lee, Jong-Ho Lee, and Ho-Il Ji*
    Science Advances, 2021
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  6. 2018_H_An_NatEnergy.png
    A 5 x 5 cm2 protonic ceramic fuel cell with a power density of 1.3 W cm-2 at 600°C
    Hyegsoon An, Hae-Weon Lee, Byung-Kook Kim, Ji-Won Son, Kyung Joong Yoon, Hyoungchul Kim, Dongwook Shin*, Ho-Il Ji*, and Jong-Ho Lee*
    Nature Energy, 2018
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