High-Performance, Thermal Cycling Stable, Coking-Tolerant Solid Oxide Fuel Cells with Nanostructured Electrodes
2021
Zhang, Weilin | Zhou, Yucun | Hussain, A Mohammed | Song, Dong | Miura, Yohei | Chen, Yu | Luo, Zheyu | Kane, Nicholas Lattimore | Niu, Yinghua | Dale, Nilesh | Fukuyama, Yosuke | Liu, M. (Meilin)
Solid oxide fuel cells (SOFCs) are a promising solution to a sustainable energy future. However, cell performance and stability remain a challenge. Durable, nanostructured electrodes fabricated via a simple, cost-effective method are an effective way to address these problems. In this work, both the nanostructured PrBa₀.₅Sr₀.₅Co₁.₅Fe₀.₅O₅₊δ (PBSCF) cathode and Ni–Ce₀.₈Sm₀.₂O₁.₉ (SDC) anode are fabricated on a porous yttria-stabilized zirconia (YSZ) backbone via solution infiltration. Symmetrical cells with a configuration of PBSCF|YSZ|PBSCF show a low interfacial polarization resistance of 0.03 Ω cm² with minimal degradation at 700 °C for 600 h. Ni-SDC|YSZ|PBSCF single cells exhibit a peak power density of 0.62 W cm–² at 650 °C operated on H₂ with good thermal cycling stability for 110 h. Single cells also show excellent coking tolerance with stable operation on CH₄ for over 120 h. This work offers a promising pathway toward the development of high-performance and durable SOFCs to be powered by natural gas.
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