Improving oxygen incorporation rate on (La0.6Sr0.4)0.98FeO3-δ via Pr2Ni1-xCuxO4+δ surface decoration

Khoshkalam, Mohamad; Tripković, Đorđije; Tong, Xiaofeng; Faghihi-Sani, M.A.; Chen, Ming; Hendriksen, Peter Vang

doi:10.1016/j.jpowsour.2020.228035

Cited by 20 publications

(9 citation statements)

References 79 publications

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“…For example, by infiltrating Pr 6 O 11 nanoparticles into LSCF/CGO composite electrodes, Khoshkalam et al decreased the ASR c by a factor of 4 to 0.081 Ω cm 2 at 600 °C. [92] The superiority may in part come from Pr dissolving in the ceria (Pr x Ce 1−x O 2−δ (PCO)), which leads to a much higher electronic conductivity than in GDC because of electron hopping between mixed-valence Pr sites (Pr 4+ is easily reduced to Pr 3+ even under oxidizing atmosphere). [93,94] PrO x -based infiltrated electrodes were observed to be fairly stable over a 220 h impedance test.…”

Section: O 2--lt-sofcmentioning

confidence: 99%

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Advanced Materials for Thin‐Film Solid Oxide Fuel Cells: Recent Progress and Challenges in Boosting the Device Performance at Low Temperatures

Zhang

Ricote

Hendriksen

et al. 2022

Adv Funct Materials

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Solid oxide fuel cells (SOFCs) are efficient and fuel flexible electrochemical energy conversion devices that can power the future green society with regards to homes, cars, and even down to portable electronics. They do have the potential to become low cost, since no noble metals are used. Their broad commercialization, however, is hampered by the high operating temperatures of 700–900 °C. Lowering the operating temperature of SOFCs is challenging as both the charge transport in the solid electrolyte and oxygen exchange reactions are thermally activated processes. Herein, the recent progress in the development of anode, electrolyte, and cathode materials to lower the operating temperature of SOFC below 600 °C is summarized and the new opportunities, as well as challenges that remain to be solved, are discussed. The focus of this review is addressed to thin film SOFCs, sub‐micrometer SOFCs (μSOFCs) based on microelectromechanical systems, as well as devices based on proton‐conducting oxide electrolyte (protonic ceramic fuel cells), which are especially promising for powering portable devices.

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Section: O 2--lt-sofcmentioning

confidence: 99%

“…[93,94] PrO x -based infiltrated electrodes were observed to be fairly stable over a 220 h impedance test. [92] It is important to note that the risk of delamination scales with the layer thickness and the square of the TEC mismatch. [95] Hence large TEC mismatches can be tolerated for thin layers.…”

Section: O 2--lt-sofcmentioning

confidence: 99%

Advanced Materials for Thin‐Film Solid Oxide Fuel Cells: Recent Progress and Challenges in Boosting the Device Performance at Low Temperatures

Zhang

Ricote

Hendriksen

et al. 2022

Adv Funct Materials

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“…Introducing La 0.5 Sr 1.5 MnO 4+δ into La 0.5 Sr 0.5 MnO 3−δ to form La 0.5 Sr 1.5 MnO 4+δ -La 0.5 Sr 0.5 MnO 3−δ , the ORR would be broadened to entire cathode region, and PPD was 936 mW cm −2 at 700 °C (Hou et al, 2020). Porous (La 0.6 Sr 0.4 ) 0.98 FeO 3−δ electrodes impregnated with aqueous nitrate solutions of Pr 2 Ni 0.6 Cu 0.4 O 4 and Pr 2 Ni 0.7 Cu 0.3 O 4 greatly reduced the polarization resistance, from 0.98 Ω cm 2 to 0.13 Ω cm 2 and 0.16 Ω cm 2 at 650 °C (Khoshkalam et al, 2020).…”

Section: Introductionmentioning

confidence: 97%

Heterointerface Effect in Accelerating the Cathodic Oxygen Reduction for Intermediate-Temperature Solid Oxide Fuel Cells

Zhu

Meng

et al. 2022

Front. Chem.

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A solid-state mixing method was adopted to prepare a new Pr0.8Sr0.2Fe0.7Ni0.3O3−δ-Pr1.2Sr0.8Fe0.4Ni0.6O4+δ (PSFN113-214) composite cathode oxide for the solid oxide fuel cells (SOFCs). Herein, heterointerface engineering was investigated for the performance enhancement. It was found that the oxygen vacancy content could be increased by mixing the PSFN214 with PSFN113, which gave rise to the formation of a heterostructure, and resulted in the promotion of oxygen ion transport as well as the specific surface area. The optimum mixing ratio 5:5 resulted in the highest oxygen vacancy content and the largest specific surface area, indicating the strongest interface effect. Polarization resistance of PSFN113-214 (5:5) was 0.029 Ω cm2 at 800°C, which was merely 24% of PSFN113 and 39% of PSFN214. The corresponding maximum power density was 0.699 W cm−2, which was nearly 1.44 times of PSFN113 and 1.24 times of PSFN214. Furthermore, the voltage attenuation rate after 100 h was merely 0.0352% h−1. Therefore, the new PSFN113-214 composite could be a prospective cathode oxide for SOFCs.

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“…Surface modification of La 0.8 Sr 0.2 FeO 3-δ (LSF) cathode materials via impregnation of nanoparticles are an effective strategy for enhancing the electrochemical performance of SOFCs. For example, Qiuyun Lin, et al, [24] reported a peak power density (MPD) of 726 mW/cm 2 at 750 • C on a La 0.6 Sr 0.4 CoO 3-δ (LCF)-impregnated LSF-GDC cathode, much higher than that of the bare cathode (298 mW/cm 2 ). Tao Hong, et al, [25], also reported an MPD of 0.53 mW/cm 2 at 800 • C, for a BaCO 3-infiltrated LSF cathode, higher than that of a cell with a bare LSF cathode (0.3 mW/cm 2 ) and the polarization resistance was reduced to 0.84 Ω.cm 2 at 700 • C. However, to the best of our knowledge, the surface modification of an LSF-GDC composite cathode via the impregnation of BaCO 3 has not been reported to date.…”

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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Improving oxygen incorporation rate on (La0.6Sr0.4)0.98FeO3-δ via Pr2Ni1-xCuxO4+δ surface decoration

Cited by 20 publications

References 79 publications

Advanced Materials for Thin‐Film Solid Oxide Fuel Cells: Recent Progress and Challenges in Boosting the Device Performance at Low Temperatures

Advanced Materials for Thin‐Film Solid Oxide Fuel Cells: Recent Progress and Challenges in Boosting the Device Performance at Low Temperatures

Heterointerface Effect in Accelerating the Cathodic Oxygen Reduction for Intermediate-Temperature Solid Oxide Fuel Cells

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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