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Boosting and Robust Multifunction Cathode Layer for Solid Oxide Fuel Cells
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DOI：10.1021/acssuschemeng.2c01383.png)
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摘要
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Designing an efficient cathode and an accelerating sluggish oxygen reduction reaction (ORR) process are crucial to enhancing electrochemical outputs for solid oxide fuel cells (SOFCs). A novel multifunction layer (MFL) cathode that combines the Gd0.2Ce0.8O2-delta (GDC) interlayer with a La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) cathode functional layer is reported. After precisely controlling the concentration of an infiltration precursor solution, discrete and filmy LSCF on the GDC scaffold (MFL-D and MFL-F) can be prepared. Compared with the discrete-coating of LSCF (MFL-D), the film-like coating of LSCF (MFL-F) exhibits a lower initial polarization impedance of 0.093 Omega cm(2) at 750 degrees C. The as-obtained SOFCs produce an enhanced peak power density of 0.93 W cm(-2) and have successfully been operated at 0.5 A cm(-2) for 400 h with a voltage degradation of only 16 mV. Oxygen ion transport model of the MFL-F is constructed and discussed. This work provides an important insight into designing efficient cathode for SOFCs.
Keyword:
Solid oxide fuel cells
Function layer
Cathode
Infiltration
Stability
期刊
IF:
7.3
论文数:
1.7W
被引数:
10.7W
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