Improved electrochemical performance of Bi doped La0.8Sr0.2FeO3-δ nanofiber cathode for IT-SOFCs via electrospinning

Zhang, Xiaojiao; Li, Jiao; Wang, Lu; Guo, Xue; Sun, Haibin; Zhang, Hua; Hu, Qiangqiang

doi:10.1016/j.ceramint.2020.08.160

Cited by 33 publications

(4 citation statements)

References 39 publications

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“…To our satisfaction, as exhibited in Figure , the cell delivers notable peak power densities (PPDs) of 1288 and 686 mW cm –2 at 600 and 500 °C, respectively, substantially surpassing that of the BF matrix (Figure S6) and other state-of-the-art cathode materials (detailed comparison is listed in Table ). ,− In virtue of the above characteristics, the BSFY perovskite material holds great potential as an outstanding cobalt-free oxygen reduction electrode for IT-SOFCs.…”

Section: Resultsmentioning

confidence: 99%

Facile Approach to Enhance Activity and CO₂ Resistance of a Novel Cobalt-Free Perovskite Cathode for Solid Oxide Fuel Cells

et al. 2022

ACS Appl. Mater. Interfaces

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Developing high-performance and cost-effective cathodes is ever-increasingly vital for the advancement of intermediate-temperature solid oxide fuel cells (IT-SOFCs). To facilitate the popularization of nonprecious metallic and cobalt-free oxygen reduction electrodes, herein, we propose a novel perovskite-based BaFeO3−δ (BF) matrix, Ba0.75Sr0.25Fe0.875Y0.125O3−δ (BSFY), as a highly active cathode for IT-SOFCs. To our satisfaction, the BSFY electrode showcases a low area-specific resistance of 0.063 Ω cm2, as well as a high peak power density of 1288 mW cm–2 at 600 °C, yielding a more than threefold improvement compared to that of its BF counterpart (371 mW cm–2). The long-term durability test highlights its practicability under the IT operating condition. When tested in 10 vol % CO2-containing air, the BSFY electrode exhibits impressive resistance against contaminants within 50 h (<0.4 Ω cm2 with a deterioration rate of ∼0.00011 Ω cm2 min–1). Coupled with its reversible response between pure air and the contaminant, the BSFY cathode is expected to be a promising cobalt-free alternative with high CO2 resistance for IT-SOFCs.

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Section: Resultsmentioning

confidence: 99%

Facile Approach to Enhance Activity and CO₂ Resistance of a Novel Cobalt-Free Perovskite Cathode for Solid Oxide Fuel Cells

et al. 2022

ACS Appl. Mater. Interfaces

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“…Solid oxide fuel cells (SOFCs) consume oxygen and hydrogen to produce electricity, which is expected to be an important part of large‐scale distributed power generation due to the advantages of fuel adaptability, high conversion efficiency, and environmental friendliness 1,2 . Despite these advantages, traditional SOFCs still face a huge challenge to the development of commercialization because of their poor stability, sealing problems, and high cost 2,3 . To reduce the manufacturing costs and increasing the long‐term durability of SOFCs, current research is forced to decrease the working temperature to an intermediate temperature (IT) region 3 …”

Section: Introductionmentioning

confidence: 99%

“…1,2 Despite these advantages, traditional SOFCs still face a huge challenge to the development of commercialization because of their poor stability, sealing problems, and high cost. 2,3 To reduce the manufacturing costs and increasing the long-term durability of SOFCs, current research is forced to decrease the working temperature to an intermediate temperature (IT) region. 3 As the cathode resistance may increase rapidly with decreasing temperature, resulting in a reduction in SOFC performance, the modification of cathode material is critical to improve the performance of SOFCs.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical performance of La_0.6Sr_0.4CoO_3–_δ–Ce_0.9Gd_0.1O_1.95 composite cathode for IT‐SOFCs

Fan

Liu

et al. 2023

Int J Applied Ceramic Tech

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In this work, the performance of solid oxide fuel cells is improved by physically mixing Ce0.9Gd0.1O1.95 (GDC) in La0.6Sr0.4CoO3–δ (LSC) cathode. The grain size and chemical compatibility of the powder were analyzed using X‐ray diffraction. Scanning electron microscopy was used to observe the microstructure of powder and cells. The thermal expansion coefficients (TECs) of LSC–GDC powder with different mass ratios were tested (LSC:GDC = 10:0, 9:1, 8:2, 7:3, 6:4, and 5:5) and LSC–GDC (5:5) showed the minimal TEC (1.34 × 10−5 K−1 at 650°C). The cathodes with different mass ratios are prepared by screen printing. The symmetrical cell with LSC–GDC (5:5) had the smallest cathode polarization resistance (0.0801 Ω cm2 at 650°C) and the lowest activation energy (1.12 eV). The button cell with LSC–GDC (5:5) exhibited the maximum power density (513 mW cm−2 at 650°C) and could be discharged for 550 h without significant degradation. The LSC–GDC (5:5) cathode was applied to a flat‐tube solid oxide fuel cell and achieved a high power density of 552 mW cm−2 at 0.8 V. The results show that the LSC–GDC (5:5) has a bright future in commercialization.

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“…However, its performance is still inadequate compared to the requirements of cathode materials for IT-SOFCs. Consequently, several approaches have been proposed, to enhance the performance of LSF electrode materials for IT-SOFCs, such as developing composite cathodes, doping other metal ions, and surface modification [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Performance of La0.8Sr0.2FeO3-δ-Gd0.2Ce0.8O2-δ Cathode for Solid Oxide Fuel Cells by Surface Modification with BaCO3 Nanoparticles

et al. 2022

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Recently, Fe-based perovskite oxides, such as Ln1-xSrxFeO3-δ (Ln = La, Pr, Nd, Sm, Eu) have been proposed as potential alternative electrode materials for solid oxide fuel cells (SOFCs), due to their good phase stability, electrocatalytic activity, and low cost. This work presents the catalytic effect of BaCO3 nanoparticles modified on a cobalt-free La0.8Sr0.2FeO3-δ-Gd0.2Ce0.8O2-δ (LSF-GDC) composite cathode at an intermediate-temperature (IT)-SOFC. An electrochemical conductivity relaxation investigation (ECR) shows that the Kchem value of the modified LSF-GDC improves up to a factor of 17.47, demonstrating that the oxygen reduction process is effectively enhanced after surface impregnation by BaCO3. The area-specific resistance (ASR) of the LSF-GDC cathode, modified with 9.12 wt.% BaCO3, is 0.1 Ω.cm2 at 750 °C, which is about 2.2 times lower than that of the bare cathode (0.22 Ω.cm2). As a result, the anode-supported single cells, with the modified LSF-GDC cathode, deliver a high peak power density of 993 mW/cm2 at 750 °C, about 39.5% higher than that of the bare cell (712 mW/cm2). The single cells based on the modified cathode also displayed good performance stability for about 100 h at 700 °C. This study demonstrates the effectiveness of BaCO3 nanoparticles for improving the performance of IT-SOFC cathode materials.

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Improved electrochemical performance of Bi doped La0.8Sr0.2FeO3-δ nanofiber cathode for IT-SOFCs via electrospinning

Cited by 33 publications

References 39 publications

Facile Approach to Enhance Activity and CO₂ Resistance of a Novel Cobalt-Free Perovskite Cathode for Solid Oxide Fuel Cells

Facile Approach to Enhance Activity and CO₂ Resistance of a Novel Cobalt-Free Perovskite Cathode for Solid Oxide Fuel Cells

Electrochemical performance of La_0.6Sr_0.4CoO_3–_δ–Ce_0.9Gd_0.1O_1.95 composite cathode for IT‐SOFCs

Enhanced Performance of La0.8Sr0.2FeO3-δ-Gd0.2Ce0.8O2-δ Cathode for Solid Oxide Fuel Cells by Surface Modification with BaCO3 Nanoparticles

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Improved electrochemical performance of Bi doped La0.8Sr0.2FeO3-δ nanofiber cathode for IT-SOFCs via electrospinning

Cited by 33 publications

References 39 publications

Facile Approach to Enhance Activity and CO2 Resistance of a Novel Cobalt-Free Perovskite Cathode for Solid Oxide Fuel Cells

Facile Approach to Enhance Activity and CO2 Resistance of a Novel Cobalt-Free Perovskite Cathode for Solid Oxide Fuel Cells

Electrochemical performance of La0.6Sr0.4CoO3–δ–Ce0.9Gd0.1O1.95 composite cathode for IT‐SOFCs

Enhanced Performance of La0.8Sr0.2FeO3-δ-Gd0.2Ce0.8O2-δ Cathode for Solid Oxide Fuel Cells by Surface Modification with BaCO3 Nanoparticles

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Facile Approach to Enhance Activity and CO₂ Resistance of a Novel Cobalt-Free Perovskite Cathode for Solid Oxide Fuel Cells

Facile Approach to Enhance Activity and CO₂ Resistance of a Novel Cobalt-Free Perovskite Cathode for Solid Oxide Fuel Cells

Electrochemical performance of La_0.6Sr_0.4CoO_3–_δ–Ce_0.9Gd_0.1O_1.95 composite cathode for IT‐SOFCs