Synthesis and properties of SmBaCo 2−x Ni x O 5+δ perovskite oxide for IT-SOFC cathodes

Xia, Lina; He, Zhiping; Huang, Xingyuan; Yu, Yan

doi:10.1016/j.ceramint.2015.09.062

Cited by 39 publications

(16 citation statements)

References 34 publications

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“…Upon comparison of the previous results described above and the results summarized in Figure 1, it can be seen that all the XRD peaks were split in the case of Pr 0.3 Sm 0.7 Ba 0.5 Sr 0.5 Co 2 O 5+d (PSBSCO37) and Pr 0.1 Sm 0.9 Ba 0.5 Sr 0.5 Co 2 O 5+d (PSBSCO19). This showed the same phenomenon as the split XRD patterns of SBSCO, SmBaCo 2 O 5+d (SBCO), GdBaCo 2 O 5+d (GBCO), and GdBa 0.5 Sr 0.5 Co 2 O 5+d (GBSCO), which were reported as orthorhombic crystalline structures [7][8][9][11][12][13][14]. From Figure 1, when the specific peaks of PrxSm1-xBa0.5Sr0.5Co2O5+d oxide systems measured at about 23, 33, 41, 47, 59, 69, and 78 o were compared with those of SBSCO, these XRD patterns corresponded to the same peaks of SBSCO, implying that these oxide systems were synthesized as a layered perovskite crystal structure [7,8].…”

Section: Xrd Analysis and Microstructuresupporting

confidence: 67%

Pr- and Sm-Substituted Layered Perovskite Oxide Systems for IT-SOFC Cathodes

et al. 2021

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In this study, the phase synthesis and electrochemical properties of A/A//A///B2O5+d (A/: Lanthanide, A//: Ba, and A//: Sr) layered perovskites in which Pr and Sm were substituted at the A/-site were investigated for cathode materials of Intermediate Temperature-Operating Solid Oxide Fuel cells (IT-SOFC). In the PrxSm1-xBa0.5Sr0.5Co2O5+d (x = 0.1–0.9) systems, tetragonal (x < 0.4) and orthorhombic (x ≥ 0.5) crystalline structures were confirmed according to the substitution amount of Pr, which has a relatively large ionic radius, and Sm, which has a small ionic radius. All of the layered perovskite oxide systems utilized in this study presented typical metallic conductivity behavior, with decreasing electrical conductivity as temperature increased. In addition, Pr0.5Sm0.5Ba0.5Sr0.5Co2O5+d (PSBSCO55), showing a tetragonal crystalline structure, had the lowest conductivity values. However, the Area-Specific Resistance (ASR) of PSBSCO55 was found to be 0.10 Ωcm2 at 700 °C, which is lower than those of the other compositions.

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Section: Xrd Analysis and Microstructuresupporting

confidence: 67%

Pr- and Sm-Substituted Layered Perovskite Oxide Systems for IT-SOFC Cathodes

et al. 2021

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“…As air electrode material, well-known catalysts for oxygen reduction are composites of electron and ion conducting phases, such as LSM (Lanthanum Strontium Manganite) and YSZ, or mixed ionic-electronic conductors as LSCF (LaSrCoFe perovskite) (Dusastre et at, 1999;Jørgensen and Primdahl, 1999) as single phase or with CGO. Some new alternatives consist of lanthanum nickelates or cobalt oxides, which show an excellent oxygen surface exchange coefficient but low stability with other cell materials (Ferkhi et at, 2016;Xia et al, 2016). As electrolyte, fluorite structures such as zirconia-and ceria-doped materials are widely used due to their high oxygen ion conductivity (Tsipis et at, 2008;Tanwar et al, 2016).…”

Section: Introduction Sofc Operation and Structurementioning

confidence: 99%

Electrochemical Characterization and Modelling of Anode and Electrolyte Supported Solid Oxide Fuel Cells

et al. 2021

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Solid Oxide Fuel Cells (SOFCs) have emerged as an attractive alternative for efficient cogeneration of electricity and heat with reduced emissions during operation. High working temperatures result in optimized kinetics and higher efficiencies in comparison to other fuel cell types. Among different designs, Anode Supported Cells (ASCs) and Electrolyte Supported Cells are currently the most promising configurations on a commercial scale. This work analyses these two designs with a focus on electrochemical features as the main performance marker. The study was carried out using both theoretical and experimental approaches on planar single cells. A detailed test campaign at different operating conditions in terms of temperature, fuel and oxidant composition was designed. Electrochemical Impedance Spectroscopy and current-voltage (I-V) measurements were used to identify the contributions of different cell components. The electrochemical kinetics derived from the individual resistance terms was implemented in a 2D simulation tool (SIMFC-SIMulation of Fuel Cells) to obtain the detailed global cell behaviour and to understand local occurring mechanisms on anodic and cathodic cell planes. The model was validated for an anode supported cell consisting of Ni-YSZ/YSZ/LSCF-CGO and an electrolyte supported cell consisting of Ni-CGO/YSZ/LSCF-CGO, showing the possibility to tune the parameters depending on analysed cells.

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“…LnBaCo 2 O 5þd (Ln ¼ La, Pr, Nd, Sm, Gd and Y) composition have interesting features as cathode materials, such as high oxygen surface exchange coefficient and high electrical conductivities. However, cobalt-based compounds also present high thermal expansion coefficient if compared to commonly used electrode materials [57,58]. The addition of elements to their structure can attenuate this property and enhance cathode performance, therefore it has been studied by several works, e.g.…”

Section: Lnbaco 2 O 5þd Double Perovskite Cobalt-based Materials Withmentioning

confidence: 99%

“…The addition of elements to their structure can attenuate this property and enhance cathode performance, therefore it has been studied by several works, e.g. Xia et al [57] and Fu et al [58] studied LnBaCo 2 O 5þd with Ln ¼ Sm and Ln ¼ Pr, respectively, to be used as intermediate temperature SOFC cathode.…”

Section: Lnbaco 2 O 5þd Double Perovskite Cobalt-based Materials Withmentioning

confidence: 99%

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Novel materials for solid oxide fuel cell technologies: A literature review

Silva

Souza

2017

International Journal of Hydrogen Energy

316

110

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This study aims to review novel materials for solid oxide fuel cell (SOFC) applications covered in literature. Thence, it was found that current SOFC operating conditions lead to issues, such as carbon surface deposition, sulfur poisoning and quick component degradation at high temperatures, which make it unsuitable for a few applications. Therefore, many researches are focused on cell performance enhancement through replacing the materials being used in order to improve properties and/or reduce operating temperatures. Most modifications in the anode aim to avoid some issues concerning conventionally used Ni-based materials, such as carbon deposition and sulfur poisoning, besides enhancing catalytic activity, once this component is directly exposed to the fuel. It was also found literature about the cathode with the aim of developing a material with enhanced properties in a wider temperature range, which has been compared to the currently used one: LSM perovskite (La 1-x Sr x MnO 3). Novel electrolyte materials can have ionic or protonic conductivity, thus performance degradation must be avoided at several operating conditions. In order to enhance its electrochemical performance, different materials for electrodes (cathode and anode) and electrolytes have been assessed herein.

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Synthesis and properties of SmBaCo 2−x Ni x O 5+δ perovskite oxide for IT-SOFC cathodes

Cited by 39 publications

References 34 publications

Pr- and Sm-Substituted Layered Perovskite Oxide Systems for IT-SOFC Cathodes

Pr- and Sm-Substituted Layered Perovskite Oxide Systems for IT-SOFC Cathodes

Electrochemical Characterization and Modelling of Anode and Electrolyte Supported Solid Oxide Fuel Cells

Novel materials for solid oxide fuel cell technologies: A literature review

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