Rapid fabrication of lanthanum strontium cobalt ferrite (LSCF) with suppression of LSCF/YSZ chemical side reaction via flash light sintering for SOFCs

Lim, Young-Chul; Park, Junghum; Lee, Hojae; Ku, Miju; Kim, Young‐Beom

doi:10.1016/j.nanoen.2021.106524

Cited by 35 publications

(14 citation statements)

References 29 publications

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“…For example, it has been achieved the sintering of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 at temperatures lower than 373 K [ 40 ] and the co-sintering of a lanthanum strontium cobalt ferrite/Gd-doped ceria bilayer structure by FS [ 41 ]. It has been also reported the preparation of lanthanum strontium cobalt ferrite via reaction flash light sintering, in which the material is exposed to a xenon arc lamp [ 42 ]. However, to the best of our knowledge, the preparation of phase-pure LaFeO 3 perovskite by RFS has not been reported.…”

Section: Introductionmentioning

confidence: 99%

Structural, Vibrational, and Magnetic Characterization of Orthoferrite LaFeO3 Ceramic Prepared by Reaction Flash Sintering

et al. 2023

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LaFeO3 perovskite ceramics have been prepared via reaction flash technique using Fe2O3 and La2O3 as precursors. The obtained pellets have been investigated using several techniques. The formation of LaFeO3 has been clearly confirmed by X-ray diffraction. The scanning electron microscopy micrographs have shown the microporous character of the obtained pellets due to the low temperature and dwell time used in the synthesis process (10 min at 1173 K). The orthorhombic-rhombohedral phase transition has been observed at approximately 1273 K in differential thermal analysis measurements, which also allows us to determine the Néel temperature at 742 K. The fitted Mössbauer spectra exposed the presence of a single sextet ascribed to the Fe+3 ions in the tetrahedral site. Finally, magnetic measurements at room temperature indicate the antiferromagnetic character of the sample.

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Section: Introductionmentioning

confidence: 99%

Structural, Vibrational, and Magnetic Characterization of Orthoferrite LaFeO3 Ceramic Prepared by Reaction Flash Sintering

et al. 2023

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“…Besides, this residual vapor sometimes reacts with the electrolyte and produces an insulating secondary phase. 8,9 Therefore, chemically stable materials are needed in the air electrode, and increasing the electrode porosity and steam utilization factor is also considered to be another effective strategy. However, the simple addition of pore formers can no longer meet the porosity and microstructural requirements of air electrodes.…”

Section: Introductionmentioning

confidence: 99%

Highly Stable Protonic Ceramic Electrolysis Cells Based on Air Electrodes with Finger-Like Pores Current Collection Layers Running in High-Steam-Content Air

Wang,

Miao,

et al. 2023

ACS Appl. Mater. Interfaces

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The steam content in the air electrode is one of the major factors determining the efficiency and stability of protonic ceramic electrolysis cells (PCECs). In this work, the La0.6Sr0.4Co0.2Fe0.8O3‑δ (LSCF) current collection layer (CCL) film with unique finger-like pores was successfully prepared by the phase-inversion tape-casting technique (PT), which promoted the gas diffusion inside the electrode and effectively improved the stability of the single cell in high-humidity air. A screen-printed LSCF-BaCe0.7Zr0.1Y0.1Yb0.1O3 catalytic active layer (CAL) was also applied to match the thermal expansion coefficient (TEC) values and improve the interface combination. The electrochemical impedance spectroscopy (EIS) and distribution of relaxation time (DRT) studies of the symmetric cells showed that when the film was used to match different CALs as an air electrode, the gas diffusion inside the electrode was no longer restricted by the increasing steam content in air. The single cell exhibited a high electrolysis current density of 1 A cm–2 (1.25 V) at 650 °C; furthermore, no performance degradation was observed in this high current density when electrolyzed in air with 40 and 60% humidity for more than 250 h. These results present a simplified and economical scheme to develop air electrodes with high stability in wet air with a high steam content.

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“…Due to such limitations, a multitude of diverse sintering concepts targeting ceramic materials has been developed to achieve uniform densication and heat treatment over short durations, including spark plasma sintering, 5 hot press sintering, 6 ash sintering, [7][8][9] microwave sintering, [10][11][12][13][14] and ash lamp annealing or sintering. 15,16 Even though these methods can accelerate the fabrication of SOFCs, certain limitations are still present, such as complicated processing, expansive components, dangerous working environment, etc.…”

Section: Introductionmentioning

confidence: 99%

Vertical-cavity surface-emitting laser (VCSEL)-based ultrafast photonic sintering of solid oxide fuel cells (SOFCs): prospects for time-efficient/two-dimensional scalability to large-sized SOFCs

et al. 2023

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Rapid fabrication of lanthanum strontium cobalt ferrite (LSCF) with suppression of LSCF/YSZ chemical side reaction via flash light sintering for SOFCs

Cited by 35 publications

References 29 publications

Structural, Vibrational, and Magnetic Characterization of Orthoferrite LaFeO3 Ceramic Prepared by Reaction Flash Sintering

Structural, Vibrational, and Magnetic Characterization of Orthoferrite LaFeO3 Ceramic Prepared by Reaction Flash Sintering

Highly Stable Protonic Ceramic Electrolysis Cells Based on Air Electrodes with Finger-Like Pores Current Collection Layers Running in High-Steam-Content Air

Vertical-cavity surface-emitting laser (VCSEL)-based ultrafast photonic sintering of solid oxide fuel cells (SOFCs): prospects for time-efficient/two-dimensional scalability to large-sized SOFCs

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