Performance enhancement of intermediate-temperature SOFCs using Ba0.5Sr0.5Sc0.2-xTaxCo0.8O3-δ-Based composite cathodes

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science and Engineering B-advanced Functional Solid-state Materials Pub Date : 2024-11-26 DOI:10.1016/j.mseb.2024.117853

Yuanyuan Zhao , Huayu Zhang , Zilin Yan , Junwei Wu

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Abstract

High-performance cathode materials are crucial to ensuring the efficient and stable operation of solid oxide fuel cell (SOFCs), facilitating the advancement of SOFC technology. This study investigates the potential of Ba_0.5Sr_0.5Sc_0.2-_xTa_xCo_0.8O_3-δ (BSSTC_x, x = 0.025, 0.05, 0.075, 0.1, and 0.125) as cathode materials for intermediate-temperature SOFCs (IT-SOFCs). The BSSTC_x and BSSTC_x-SDC materials were characterized through X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HR-TEM). Anode-supported NiO-SDC/SDC (∼25 μm) and electrolyte supported NiO-SDC/SDC (∼200 μm) half-cells equipped with BSSTC_x cathodes were evaluated at 700 ℃. Single cells equipped with BSSTC_x-SDC cathode layers exhibited lower polarization resistance (0.029 Ω·cm²) and higher peak power density (1.225 W/cm²), with stable operation for longer than 90 h at 700 ℃ and a current density of 0.817 A/cm², compared to those with BSSTC_x cathodes alone. Therefore, BSSTC_x and BSSTC_x-SDC are promising composite cathode materials for intermediate-temperature SOFCs and high-performance cathode materials in SOFCs.

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使用基于 Ba0.5Sr0.5Sc0.2-xTaxCo0.8O3-δ 的复合阴极提高中温 SOFC 的性能

高性能阴极材料是确保固体氧化物燃料电池（SOFC）高效稳定运行的关键，有助于推动 SOFC 技术的发展。本研究探讨了 Ba0.5Sr0.5Sc0.2-xTaxCo0.8O3-δ（BSSTCx，x = 0.025、0.05、0.075、0.1 和 0.125）作为中温 SOFC（IT-SOFC）阴极材料的潜力。通过 X 射线衍射 (XRD)、X 射线光电子能谱 (XPS) 和高分辨率透射电子显微镜 (HR-TEM) 对 BSSTCx 和 BSSTCx-SDC 材料进行了表征。在 700 ℃ 下评估了阳极支持的 NiO-SDC/SDC（∼25 μm）和电解质支持的 NiO-SDC/SDC（∼200 μm）半电池，这些半电池配备了 BSSTCx 阴极。与单独使用 BSSTCx 阴极的单电池相比，配备 BSSTCx-SDC 阴极层的单电池具有更低的极化电阻（0.029 Ω-cm2）和更高的峰值功率密度（1.225 W/cm2），在 700 ℃ 下可稳定工作 90 小时以上，电流密度为 0.817 A/cm2。因此，BSSTCx 和 BSSTCx-SDC 是很有前途的中温 SOFC 复合阴极材料和 SOFC 中的高性能阴极材料。

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来源期刊

Materials Science and Engineering B-advanced Functional Solid-state Materials 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.