Boosting Electrochemical High-Performance via Extra-Role of Doped CeO2-δ Interlayer for “Oxygen Provider” at High-Current SOFC Operation
Nguyen Xua Dong a, Lee Sang Won a, Kim Hye Young a, Tae Ho Shin a
a Low-carbon & DX R&D Division, Korea Institute of Ceramic Engineering and Technology, Jinju‑si, Gyeongsangnam‑do 52851, Republic of Korea.
Proceedings of 24th International Conference on Solid State Ionics (SSI24)
London, United Kingdom, 2024 July 14th - 19th
Organizers: John Kilner and Stephen Skinner
Oral, Tae Ho Shin, presentation 626
Publication date: 10th April 2024

Utilizing rare-earth doped ceria in solid oxide cells (SOCs) engineering is indeed a strategy to enhance the electrochemical devices' durability and activity. Gd-doped ceria (GDC) is actively used for barrier layer and catalytic additives in solid oxide fuel cells (SOFCs). In this study, we conducted experiments with La-doped CeO2 (LDC) or Bi-doped Ceria-based materials, in which the Ce sites are predominantly occupied by La, to prevent the formation of the Ce-Zr solid solution. This LDC was comparably used as a functional interlayer between the electrolyte and cathode if sintered at lower temperatures to avoid La2Zr2O7 impurity. In addition, the high substitution of La3+ into the ceria lattice improves the oxygen non-stoichiometry of LDC, leading to accelerated electrochemical high performance by the additional role of LDC for oxygen supplier capacitance at high-current operation. Thus, we confirmed that the improved SOFC high performance was achieved at the maximum power density (MPD) of ~2.15 W cm-2 at 800oC when the optimized LDC buffer layer was hired at the anode supported typed- Samsung’s SOFC by lowering the sintering temperature to prevent LDC’s impurity reaction.


[1], C. Graves, Nat. Mater., 2014, 14, 239-244

[2], Tatsumi Ishihara, J. Korean Ceram. Soc. > Volume 53(5); 201

This research was supported by the National R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT, grant numbers NRF- 2022M3H4A1A04076616, NRF-2021M3H4A3A02086499, NRF-2020M3H4A3105824. This work was also supported by KOREA HYDRO & NUCLEAR POWER CO., LTD (No. 23-Tech-13). We also thank the Ceramic Strategic Technology R&D program through the Korea Institute of Ceramic Engineering & Technology (KICET) (grant NTIS no. 1415187241, KPP22012,).

We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info