Bae, Kiho Jang, Dong Young Choi, Hyung Jong Kim, Donghwan Hong, Jongsup Kim, Byung-Kook Lee, Jong-Ho Son, Ji-Won Shim, Joon Hyung 2024-01-20T02:30:45Z 2024-01-20T02:30:45Z 2021-09-01 2017-02 2041-1723 https://pubs.kist.re.kr/handle/201004/123161 In reducing the high operating temperatures (>= 800 degrees C) of solid-oxide fuel cells, use of protonic ceramics as an alternative electrolyte material is attractive due to their high conductivity and low activation energy in a low-temperature regime (<= 600 degrees C). Among many protonic ceramics, yttrium-doped barium zirconate has attracted attention due to its excellent chemical stability, which is the main issue in protonic-ceramic fuel cells. However, poor sinterability of yttrium-doped barium zirconate discourages its fabrication as a thin-film electrolyte and integration on porous anode supports, both of which are essential to achieve high performance. Here we fabricate a protonic-ceramic fuel cell using a thin-film-deposited yttrium-doped barium zirconate electrolyte with no impeding grain boundaries owing to the columnar structure tightly integrated with nanogranular cathode and nanoporous anode supports, which to the best of our knowledge exhibits a record high-power output of up to an order of magnitude higher than those of other reported barium zirconate-based fuel cells. English Nature Publishing Group Demonstrating the potential of yttrium-doped barium zirconate electrolyte for high-performance fuel cells Article 10.1038/ncomms14553 1 Nature Communications, v.8 Nature Communications 8 Y scie scopus 000394589200001 2-s2.0-85013779139 Multidisciplinary Sciences Science & Technology - Other Topics Article STABILIZED ZIRCONIA CHEMICAL-STABILITY PROTON CONDUCTOR ANODE FABRICATION SOFC Proton conducting ceramic fuel cell Barium Zirconate Thin film multi-scale-architecturing