A Synergistic Three-Phase, Triple-Conducting Air Electrode for Reversible Proton-Conducting Solid Oxide Cells

Zhang, Weilin; Zhou, Yucun; Hu, Xueyu; Ding, Yong; Gao, Jun; Luo, Zheyu; Li, Tongtong; Kane, Nicholas; Yu, Xiao-Ying; Terlier, Tanguy; Liu, Meilin

doi:10.1021/acsenergylett.3c01251

Title: A Synergistic Three-Phase, Triple-Conducting Air Electrode for Reversible Proton-Conducting Solid Oxide Cells

Journal Article · 01 September 2023 · ACS Energy Letters

DOI: https://doi.org/10.1021/acsenergylett.3c01251 · OSTI ID:1997868

^[1]; Zhou, Yucun ^[1]; Hu, Xueyu ^[1]; Ding, Yong ^[1]; Gao, Jun ^[2];

^[1];

^[3]; Kane, Nicholas ^[1];

^[4];

^[5];

^[1]

Georgia Institute of Technology, Atlanta, GA (United States)
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Georgia Institute of Technology, Atlanta, GA (United States); Okinawa Institute of Science and Technology, Onna (Japan)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Rice Univ., Houston, TX (United States). SIMS Laboratory, Shared Equipment Authority

Reversible proton-conducting solid oxide cells (R-PSOCs) have the potential to be the most efficient and cost-effective electrochemical device for energy storage and conversion. A breakthrough in air electrode material development is vital to minimizing the energy loss and degradation of R-PSOCs. Here we report a class of triple-conducting air electrode materials by judiciously doping transition- and rare-earth metal ions into a proton-conducting electrolyte material, which demonstrate outstanding activity and durability for R-PSOC applications. The optimized composition Ba_0.9Pr_0.1Hf_0.1Y_0.1Co_0.8O_3-δ (BPHYC) consists of three phases, which have a synergistic effect on enhancing the performance, as revealed from electrochemical analysis and theoretical calculations. When applied to R-PSOCs operated at 600 °C, a peak power density of 1.37 W cm^–2 is demonstrated in the fuel cell mode, and a current density of 2.40 A cm^–2 is achieved at a cell voltage of 1.3 V in the water electrolysis mode under stable operation for hundreds of hours.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Georgia Institute of Technology, Atlanta, GA (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Fossil Energy and Carbon Management (FECM), Office of Carbon Management

Grant/Contract Number:: AC05-00OR22725; FE0032115

OSTI ID:: 1997868

Alternate ID(s):: OSTI ID: 2001388; OSTI ID: 2202646; OSTI ID: 2448289

Report Number(s):: DE-FE0032115

Journal Information:: ACS Energy Letters, Vol. 8, Issue 10; ISSN 2380-8195

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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