GDC Buffer Layer Synthesized by Reactive Magnetron Sputtering: Effect of Total Pressure and Thickness on SOFC Performances

Bouleau, Lara; Cotón, N.; Coquoz, Pierre; Ihringer, Raphaël; Billard, Alain; Briois, Pascal

doi:10.3390/cryst10090759

Cited by 9 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With 8 μm, PBM shows moderate ASR increases, while PrCe5 remains stable. Those results suggest a 3.5 μm-GDC layer as optimal for praseodymium barium double perovskite manganite electrodes in SOFC anodes, differing from previous studies of Briois et al recommending a ∼0.57 μm-GDC layer 32. The 3.5 μm-GDC layer thickness achieves the lowest ASR after 220 h at T = 750 °C for our Ba-rich double layered perovskite anodes in a hydrogen environment, supporting the effectiveness of 2−4 μm-GDC layers for SOFC anode performance and mass production, as reported previously 58.…”

contrasting

confidence: 90%

“…Symmetrical cells were fabricated using commercial 230 μm-thick 8YSZ disks, each measuring 25 mm in diameter (Tosoh). To prevent ionic interdiffusion and chemical reactions, a Ce 0.9 Gd 0.1 O 1.95 (GDC) buffer layer was deposited on both sides of the electrolyte through physical vapor deposition. , The experimental setup comprises a 100 L Alcatel SCM 650 sputtering chamber, evacuated by an integrated system that includes an XDS35i dry pump and a 5401CP turbo-molecular pump. This chamber is outfitted with a trio of magnetron targets, each 200 mm in diameter, and a rotating substrate holder 620 mm in diameter, positioned parallel to the targets at an approximate distance of 110 mm.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Ce- and Ni-Codoped Double PrBaMn₂O₅ Perovskite as a Ceramic SOFC Anode

Managutti,

Wen,

Hansen

et al. 2024

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

This study explores the efficacy of cerium introduction, both on its own and in combination with nickel, into PrBaMn 2 O 5+δ (PBM) structures to enhance solid oxide fuel cell (SOFC) anodes. We synthesized Pr 1−x Ce x BaMn 2 O 5+δ compositions for x values of 0.05 (PrCe5) and 0.1 (PrCe10), as well as a nickel-doped variant (PrCe5Ni), assessing their performance under H 2 − 3% H 2 O reducing conditions pertinent to SOFC anode operations. Our findings reveal that the PrCe5 composition exhibits a thermal expansion coefficient (TEC) that not only improves upon that of the Ce-free counterpart but also aligns closely with the TEC standards of prevalent SOFC electrolytes. A notable advancement was achieved with the application of a 3.5 μm gadoliniadoped ceria (GDC) buffer layer through physical vapor deposition, effectively mitigating chemical interactions between PBM-based anodes and yttria-stabilized zirconia (YSZ) electrolytes, a concern highlighted by in situ neutron diffraction analyses. Electrochemical impedance spectroscopy, conducted over 220 h in a H 2 −3% H 2 O atmosphere at 750 °C, demonstrated that the optimal 3.5 μm thickness of the GDC buffer layer significantly minimizes the area-specific resistance (ASR) degradation rate to 0.002 Ω cm 2 /h, markedly outperforming both thinner (1 μm) and thicker (8 μm) GDC layers, which showed higher degradation rates of 0.15−0.2 Ω cm 2 /h due to the diffusion of Ba ions or delamination. Moreover, cerium doping fosters superior microstructural stability and obviates barium diffusion, thereby suggesting an enhanced durability of the doped anodes over their lifespan. Integrating nickel into the PrCe5 structure halved the ASR to 0.5 Ω cm 2 at 750 °C, situating it well within the ideal performance range for SOFC anodes. The enhancement brought about by simultaneously doping PBM with cerium and nickel, which fundamentally relies on the critical contributions of defect chemistry and crystal structure, highlights the significance of these fields in creating sophisticated materials for energy related applications.

show abstract

contrasting

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Ce- and Ni-Codoped Double PrBaMn₂O₅ Perovskite as a Ceramic SOFC Anode

Managutti,

Wen,

Hansen

et al. 2024

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Figure 2 shows cross-sectional SEM images of the magnetron sputtered SDC electrolyte obtained on the anode support after deposition and subsequent annealing at 1000 °C in air. It is known that high-temperature annealing provides the growth in crystallinity of magnetron sputtered YSZ and GDC layers [ 42 , 43 ]. The 5 µm thick electrolyte has good adhesion to the substrate.…”

Section: Resultsmentioning

confidence: 99%

Solid Oxide Fuel Cells with Magnetron Sputtered Single-Layer SDC and Multilayer SDC/YSZ/SDC Electrolytes

2023

View full text Add to dashboard Cite

Samarium-doped ceria (SDC) is considered as an alternative electrolyte material for intermediate-temperature solid oxide fuel cells (IT-SOFCs) because its conductivity is higher than that of commonly used yttria-stabilized zirconia (YSZ). The paper compares the properties of anode-supported SOFCs with magnetron sputtered single-layer SDC and multilayer SDC/YSZ/SDC thin-film electrolyte, with the YSZ blocking layer 0.5, 1, and 1.5 μm thick. The thickness of the upper and lower SDC layers of the multilayer electrolyte are constant and amount to 3 and 1 μm, respectively. The thickness of single-layer SDC electrolyte is 5.5 μm. The SOFC performance is studied by measuring current–voltage characteristics and impedance spectra in the range of 500–800 °C. X-ray diffraction and scanning electron microscopy are used to investigate the structure of the deposited electrolyte and other fuel cell layers. SOFCs with the single-layer SDC electrolyte show the best performance at 650 °C. At this temperature, open circuit voltage and maximum power density are 0.8 V and 651 mW/cm2, respectively. The formation of the SDC electrolyte with the YSZ blocking layer improves the open circuit voltage up to 1.1 V and increases the maximum power density at the temperatures over 600 °C. It is shown that the optimal thickness of the YSZ blocking layer is 1 µm. The fuel cell with the multilayer SDC/YSZ/SDC electrolyte, with the layer thicknesses of 3/1/1 µm, has the maximum power density of 2263 and 1132 mW/cm2 at 800 and 650 °C, respectively.

show abstract

“…Various methods are used for the deposition of barrier layers in SOFC technology [ 21 , 22 ]: ceramic methods, such as screen-printing [ 23 ] and tape calendering [ 24 , 25 ]; vacuum deposition technologies, e.g., magnetron sputtering [ 26 , 27 ], pulsed laser deposition [ 10 , 28 ], and physical vapor deposition (PVD) [ 29 ]; aerosol-spraying methods under atmospheric [ 30 ] and reduced pressures [ 31 ]; and colloidal and solution technologies—electrophoretic deposition [ 32 , 33 ], dip-coating and sol-gel [ 34 , 35 ], suspension centrifugation [ 36 ] etc. One of the flexible, easy-to-implement, and cheap technologies is electrophoretic deposition (EPD), which does not require high-tech equipment and allows the deposition of coatings at room temperature in ambient air with a sufficiently high deposition rate of ~1–10 μm per 1 min [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic Deposition and Characterization of the Doped BaCeO3 Barrier Layers on a Supporting Ce0.8Sm0.2O1.9 Solid-State Electrolyte

2022

View full text Add to dashboard Cite

In this study, the technology of electrophoretic deposition (EPD) micrometer barrier layers based on a BaCe0.8Sm0.19Cu0.1O3 (BCSCuO) protonic conductor on dense carrying Ce0.8Sm0.2O1.9 (SDC) solid-state electrolyte substrates is developed. Methods for creating conductive sublayers on non-conductive SDC substrates under EPD conditions, such as the synthesis of a conductive polypyrrole (PPy) layer and deposition of a layer of finely dispersed platinum from a suspension of its powder in isopropanol, are proposed. The kinetics of disaggregation, disperse composition, electrokinetic potential, and the effect of adding iodine to the BCSCuO suspension on these parameters as factors determining the preparation of stable suspensions and successful EPD processes are explored. Button cells based on a carrying SDC electrolyte of 550 μm in thickness with BCSCuO layers (8–35 μm) on the anode, cathode, and anode/cathode side, and Pt electrodes are electrochemically tested. It was found that the effect of blocking the electronic current in the SDC substrate under OCV conditions was maximal for the cells with barrier layers deposited on the anode side. The technology developed in this study can be used to fabricate solid oxide fuel cells with doped CeO2 electrolyte membranes characterized by mixed ionic–electronic conductivity (MIEC) under reducing atmospheres.

show abstract

GDC Buffer Layer Synthesized by Reactive Magnetron Sputtering: Effect of Total Pressure and Thickness on SOFC Performances

Cited by 9 publications

References 20 publications

Ce- and Ni-Codoped Double PrBaMn₂O₅ Perovskite as a Ceramic SOFC Anode

Ce- and Ni-Codoped Double PrBaMn₂O₅ Perovskite as a Ceramic SOFC Anode

Solid Oxide Fuel Cells with Magnetron Sputtered Single-Layer SDC and Multilayer SDC/YSZ/SDC Electrolytes

Electrophoretic Deposition and Characterization of the Doped BaCeO3 Barrier Layers on a Supporting Ce0.8Sm0.2O1.9 Solid-State Electrolyte

Contact Info

Product

Resources

About

GDC Buffer Layer Synthesized by Reactive Magnetron Sputtering: Effect of Total Pressure and Thickness on SOFC Performances

Cited by 9 publications

References 20 publications

Ce- and Ni-Codoped Double PrBaMn2O5 Perovskite as a Ceramic SOFC Anode

Ce- and Ni-Codoped Double PrBaMn2O5 Perovskite as a Ceramic SOFC Anode

Solid Oxide Fuel Cells with Magnetron Sputtered Single-Layer SDC and Multilayer SDC/YSZ/SDC Electrolytes

Electrophoretic Deposition and Characterization of the Doped BaCeO3 Barrier Layers on a Supporting Ce0.8Sm0.2O1.9 Solid-State Electrolyte

Contact Info

Product

Resources

About

Ce- and Ni-Codoped Double PrBaMn₂O₅ Perovskite as a Ceramic SOFC Anode

Ce- and Ni-Codoped Double PrBaMn₂O₅ Perovskite as a Ceramic SOFC Anode