Journal article
Evaluation of La0.6Sr0.4CoO3-δ-Ce0.85Sm0.075Nd0.075O2-δ composite cathodes for intermediate temperature solid oxide fuel cells
Jiangxi University of Science and Technology1
CAS - Ningbo Institute of Material Technology and Engineering2
Continuum Modelling and Testing, Department of Energy Conversion and Storage, Technical University of Denmark3
Department of Energy Conversion and Storage, Technical University of Denmark4
Ningbo University5
Aiming to lower the operating temperature of solid oxide fuel cells down to 500–700 °C, a Co-containing composite cathode La0.6Sr0.4CoO3-δ-Ce0.85Sm0.075Nd0.075O2-δ (LSC-SNDC) is prepared by the solid-liquid method. The crystallinity, grain size and microstructure of LSC powders are analyzed by X-ray diffractometry (XRD) and scanning electron microscopy (SEM).
The LSC-SNDC cathodes with different mass ratios (LSC: SNDC = 100:0, 90:10, 70:30, 60:40 and 50:50) are implemented into symmetrical cells and full cells using screen printing. The effect of cathode sintering temperatures (900, 950, 1000, 1050 °C) is investigated at the symmetrical cell level. The lowest cathode polarization resistance (Rp) is obtained with the 50:50 sample sintered at 950 °C, demonstrating a Rp (symmetrical cell) of 0.0248, 0.0319, 0.0597, 0.1107 and 0.2304 Ω cm2 and a maximum power density (full cell) of 1963, 1535, 1013, 585, and 302mW cm−2 at 800, 750, 700, 650 and 600 °C, respectively.
The LSC-SNDC (50:50) cathode exhibits a low thermal expansion coefficient of 12.3×10−6 K−1 and good compatibility with other cell components, as confirmed from SEM observations. The current work demonstrates that LSC-SNDC is a promising cathode material for intermediate temperature solid oxide fuel cells.
Language: | English |
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Year: | 2022 |
Pages: | 16319-16325 |
ISSN: | 18733956 and 02728842 |
Types: | Journal article |
DOI: | 10.1016/j.ceramint.2022.02.182 |
ORCIDs: | 0000-0001-8813-6559 and Chen, Ming |