Lowering the operating temperature of protonic ceramic electrochemical cells to

Fan Liu, Hao Deng, David Diercks, Praveen Kumar, Mohammed Hussain Abdul Jabbar, Cenk Gumeci, Yoshihisa Furuya, Nilesh Dale, Takanori Oku, Masahiro Usuda, Pejman Kazempoor, Liyang Fang, Di Chen, Bin Liu and Chuancheng Duan ()
Additional contact information
Fan Liu: Kansas State University
Hao Deng: Kansas State University
David Diercks: Colorado School of Mines
Praveen Kumar: Colorado School of Mines
Mohammed Hussain Abdul Jabbar: Nissan Technical Centre North America (NTCNA)
Cenk Gumeci: Nissan Technical Centre North America (NTCNA)
Yoshihisa Furuya: Nissan Technical Centre North America (NTCNA)
Nilesh Dale: Nissan Technical Centre North America (NTCNA)
Takanori Oku: Nissan Motor Company Limited
Masahiro Usuda: Nissan Motor Company Limited
Pejman Kazempoor: University of Oklahoma
Liyang Fang: Kansas State University
Di Chen: Kansas State University
Bin Liu: Kansas State University
Chuancheng Duan: Kansas State University

Nature Energy, 2023, vol. 8, issue 10, 1145-1157

Abstract: Abstract Protonic ceramic electrochemical cells (PCECs) can be employed for power generation and sustainable hydrogen production. Lowering the PCEC operating temperature can facilitate its scale-up and commercialization. However, achieving high energy efficiency and long-term durability at low operating temperatures is a long-standing challenge. Here, we report a simple and scalable approach for fabricating ultrathin, chemically homogeneous, and robust proton-conducting electrolytes and demonstrate an in situ formed composite positive electrode, Ba0.62Sr0.38CoO3−δ–Pr1.44Ba0.11Sr0.45Co1.32Fe0.68O6−δ, which significantly reduces ohmic resistance, positive electrode–electrolyte contact resistance and electrode polarization resistance. The PCECs attain high power densities in fuel-cell mode (~0.75 W cm−2 at 450 °C and ~0.10 W cm−2 at 275 °C) and exceptional current densities in steam electrolysis mode (−1.28 A cm−2 at 1.4 V and 450 °C). At 600 °C, the PCECs achieve a power density of ~2 W cm−2. Additionally, we demonstrate the direct utilization of methane and ammonia for power generation at

Date: 2023
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DOI: 10.1038/s41560-023-01350-4

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