Choi, Hyung Jong Kim, Keun Hee Jeong, Heon Jun Kim, Dong Hwan Han, Gwon Deok Ji, Ho-Il Lee, Jong-Ho Prinz, Fritz B. Bae, Kiho Shim, Joon Hyung 2026-02-03T09:30:39Z 2026-02-03T09:30:39Z 2026-02-02 2025-12 0272-8842 https://pubs.kist.re.kr/handle/201004/154179 The effects of sintering temperature and Zr/Ce ratio on BaZrxCe0.8–xY0.1Yb0.1O3−δ (BZCYYb) for proton ceramic fuel cell applications were investigated. Higher sintering temperatures and higher Ce contents led to increased formation of Y/Yb-rich secondary phases, attributed to Ba evaporation and Ce loss, which disrupted B-site stability. Electrochemical testing using thin-film electrolytes on the anode-supported cells showed that sintering at ≥1400 °C caused high interfacial resistance due to these secondary phases. In contrast, sintering at 1300 °C resulted in insufficient densification and high ohmic resistance. The optimal performance was achieved with a BZCYYb 2611 sample sintered at 1350 °C, exhibiting good densification, minimal secondary phase formation, and high power density across various operating temperatures. This sample demonstrated the best chemical and electrochemical stability. English Elsevier Process-property relationships of protonic ceramic electrolytes Article 10.1016/j.ceramint.2025.10.353 1 Ceramics International, v.51, no.29, pp.61608 - 61618 Ceramics International 51 29 61608 61618 N scie scopus 001652159800016 2-s2.0-105024312653 Materials Science, Ceramics Materials Science Article OXIDE FUEL-CELLS CHEMICAL-STABILITY TRANSPORT-PROPERTIES IONIC-RADII CONDUCTORS NONSTOICHIOMETRY CONDUCTIVITY CATHODE Proton ceramic fuel cell Electrolyte Secondary-phase Sintering temperature