Redox stability of metal-supported fuel cells with nickel/gadolinium-doped ceria anode

JOURNAL OF POWER SOURCES

卷:434

Article

Thaler, Florian^1,2  Udomsilp, David^1,2  Schafbauer, Wolfgang³  Bischof, Cornelia^1,3  Fukuyama, Yosuke⁴  Miura, Yohei⁴  Kawabuchi, Mari⁴  Taniguchi, Shunsuke⁵  Takemiya, Satoshi⁵  Nenning, Andreas^1,6  Opitz, Alexander Karl^1,6  Bram, Martin^1,2 

[1] Christian Doppler Lab Interfaces Met Supported El, Vienna, Austria

[2] Forschungszentrum Julich, Inst Energy & Climate Res Mat Synth & Proc IEK 1, Julich, Germany

[3] Plansee SE, Reutte, Austria

[4] Nissan Motor Co Ltd, EV Syst Lab, Yokohama, Kanagawa, Japan

[5] Kyushu Univ, Next Generat Fuel Cell Res Ctr, Fukuoka, Fukuoka, Japan

[6] TU, Res Grp Electrochem Energy Convers, Inst Chem Technol & Analyt, Vienna, Austria

关键词: Metal-supported solid oxide fuel cell (MSC);    Ni/GDC anode;    Ni/YSZ anode;    Redox cycling;    Electrochemical testing;    FIB-SEM 3D microstructure reconstruction;   

DOI  :  10.1016/j.jpowsour.2019.226751

来源: Elsevier

【 摘 要 】

Metal-supported fuel cells (MSCs) are promising candidates for not only stationary but also mobile applications. Their appeal is in their potential to withstand reoxidation of the anode, which might occur by an interruption of the fuel supply or an emergency shutdown of the fuel cell system. A novel nickel/gadolinium-doped ceria anode (Ni/GDC) was recently introduced in a MSC concept of Plansee, almost doubling power density compared to cells with a nickel/yttria-doped zirconia (Ni/YSZ) anode. In this study, both cell concepts are compared concerning their ability to tolerate harsh redox cycles. Therefore, controlled redox cycles of the anodes were conducted at different temperatures. The response of the cell's power output to the redox cycling experiments was continuously recorded. In the case of MSCs with a Ni/YSZ anode, strong degradation occurs after redox cycling. In contrast, cells with a Ni/GDC anode exhibit significantly improved redox tolerance and cell performance improves with the number of redox cycles. For understanding this behavior, microstructural investigations of the Ni/GDC anode and the adjacent electrolyte were performed by FIB-SEM. The long-term redox behavior of MSCs with a Ni/GDC anode was also investigated by conducting more comprehensive redox cycles at 400 degrees C, 500 degrees C, and 600 degrees C.

【 授权许可】

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