A 5 × 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 ()
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Hyegsoon An: Korea Institute of Science and Technology
Hae-Weon Lee: Korea Institute of Science and Technology
Byung-Kook Kim: Korea Institute of Science and Technology
Ji-Won Son: Korea Institute of Science and Technology
Kyung Joong Yoon: Korea Institute of Science and Technology
Hyoungchul Kim: Korea Institute of Science and Technology
Dongwook Shin: Hanyang University
Ho-Il Ji: Korea Institute of Science and Technology
Jong-Ho Lee: Korea Institute of Science and Technology

Nature Energy, 2018, vol. 3, issue 10, 870-875

Abstract: Abstract In spite of various advantages of protonic ceramic fuel cells over conventional fuel cells, distinct scepticism currently remains about their applicability because of lower-than-predicted performance and difficulty with scale-up. These challenges mainly stem from the refractory nature of proton-conducting ceramic electrolytes and the low chemical stability of these materials during the sintering process. Here, we present the fabrication of a physically thin, structurally dense and chemically homogeneous electrolyte, BaCe0.55Zr0.3Y0.15O3-δ (BCZY3), through a facile anode-assisted densification of the electrolyte on a structurally and compositionally uniform anode support, which resulted in breakthroughs in performance and scalability. A BCZY3-based protonic ceramic fuel cell with a size of 5 × 5 cm2 exhibits an area-specific ohmic resistance of 0.09 Ω cm2 and delivers a power as high as 20.8 W per single cell at 600 °C.

Date: 2018
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DOI: 10.1038/s41560-018-0230-0

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