Layered LnBa1−xSrxCoCuO5+δ (Ln = Nd and Gd) perovskite cathodes for intermediate temperature solid oxide fuel cells

West, Matthew; Manthiram, Arumugam

doi:10.1016/j.ijhydene.2012.12.133

Cited by 26 publications

(16 citation statements)

References 21 publications

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“…The SBSC cathode showed high structural stability when the samples were calcined under temperatures of 1,000 °C and 1,200 °C, which does not influence the crystal structure [33].…”

Section: Crystal Structurementioning

confidence: 99%

An analysis of SmBa0.5Sr0.5Co2O5+δ double perovskite oxide for intermediate–temperature solid oxide fuel cells

Subardi

Susanto

Kartikasari

et al. 2021

EEJET

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The main obstacle to solid oxide fuel cells (SOFCs) implementation is the high operating temperature in the range of 800–1,000 °C so that it has an impact on high costs. SOFCs work at high temperatures causing rapid breakdown between layers (anode, electrolyte, and cathode) because they have different thermal expansion. The study focused on reducing the operating temperature in the medium temperature range. SmBa0.5Sr0.5Co2O5+δ (SBSC) oxide was studied as a cathode material for IT-SOFCs based on Ce0.8Sm0.2O1.9 (SDC) electrolyte. The SBSC powder was prepared using the solid-state reaction method with repeated ball-milling and calcining. Alumina grinding balls are used because they have a high hardness to crush and smooth the powder of SOFC material. The specimens were then tested as cathode material for SOFC at intermediate temperature (600–800 °C) using X-ray powder diffraction (XRD), thermogravimetric analysis (TGA), electrochemical, and scanning electron microscopy (SEM) tests. The X-ray powder diffraction (XRD) pattern of SBSC powder can be indexed to a tetragonal space group (P4/mmm). The overall change in mass of the SBSC powder is 8 % at a temperature range of 125–800 °C. A sample of SBSC powder showed a high oxygen content (5+δ) that reached 5.92 and 5.41 at temperatures of 200 °C and 800 °C, respectively. High diffusion levels and increased surface activity of oxygen reduction reactions (ORRs) can be affected by high oxygen content (5+δ). The polarization resistance (Rp) of samples sintered at 1000 °C is 4.02 Ωcm2 at 600 °C, 1.04 Ωcm2 at 700 °C, and 0.42 Ωcm2 at 800 °C. The power density of the SBSC cathode is 336.1, 387.3, and 357.4 mW/cm2 at temperatures of 625 °C, 650 °C, and 675 °C, respectively. The SBSC demonstrates as a prospective cathode material for IT-SOFC

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“…The SBSC cathode showed high structural stability when the samples were calcined under temperatures of 1,000 °C and 1,200 °C, which does not influence the crystal structure [33].…”

Section: Crystal Structurementioning

confidence: 99%

An analysis of SmBa0.5Sr0.5Co2O5+δ double perovskite oxide for intermediate–temperature solid oxide fuel cells

Subardi

Susanto

Kartikasari

et al. 2021

EEJET

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“…Other work investigating A-site compositional changes have involved partially substituting Sr for Ba. This has been largely ineffective, with larger proportions of Sr in the system Ba 1−x Sr x LnCoCuO 6−δ (0 ≤ x ≤ 0.75) (Ln = Nd or Gd) resulting in insignificant changes to the thermal expansion coefficient [374,375]. However, the introduction of Sr seems to induce a small increase of the chemical expansion upon reduction, although this was only demonstrated for a few of the compositions studied.…”

Section: Complex Perovskitesmentioning

confidence: 99%

Thermal and Chemical Expansion in Proton Ceramic Electrolytes and Compatible Electrodes

2018

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This review paper focuses on the phenomenon of thermochemical expansion of two specific categories of conducting ceramics: Proton Conducting Ceramics (PCC) and Mixed Ionic-Electronic Conductors (MIEC). The theory of thermal expansion of ceramics is underlined from microscopic to macroscopic points of view while the chemical expansion is explained based on crystallography and defect chemistry. Modelling methods are used to predict the thermochemical expansion of PCCs and MIECs with two examples: hydration of barium zirconate (BaZr1−xYxO3−δ) and oxidation/reduction of La1−xSrxCo0.2Fe0.8O3−δ. While it is unusual for a review paper, we conducted experiments to evaluate the influence of the heating rate in determining expansion coefficients experimentally. This was motivated by the discrepancy of some values in literature. The conclusions are that the heating rate has little to no effect on the obtained values. Models for the expansion coefficients of a composite material are presented and include the effect of porosity. A set of data comprising thermal and chemical expansion coefficients has been gathered from the literature and presented here divided into two groups: protonic electrolytes and mixed ionic-electronic conductors. Finally, the methods of mitigation of the thermal mismatch problem are discussed.

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“…After McKinlay et al [78] and Kim et al [67] publications, many researches followed their steps, producing double perovskites with general formula LnBa 0.5 Sr 0.5 Co 2 O 5þd , using different rare earths [46,47,52,65,76,105] or trying also with B site dopants (Cu [57,79,103], Mn [58,64], Ni [51], Fe [45,74]) in order to reduce TEC. However the lowest TEC value has been achieved by Wang et al that tried to optimize the Mn content in double perovskite SmSrCo 2Àx Mn x O 5þd .…”

Section: Review Of the Most Promising Materialsmentioning

confidence: 99%

Cobalt based layered perovskites as cathode material for intermediate temperature Solid Oxide Fuel Cells: A brief review

Pelosato

Cordaro

Stucchi

et al. 2015

Journal of Power Sources

252

123

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Layered LnBa1−xSrxCoCuO5+δ (Ln = Nd and Gd) perovskite cathodes for intermediate temperature solid oxide fuel cells

Cited by 26 publications

References 21 publications

An analysis of SmBa0.5Sr0.5Co2O5+δ double perovskite oxide for intermediate–temperature solid oxide fuel cells

An analysis of SmBa0.5Sr0.5Co2O5+δ double perovskite oxide for intermediate–temperature solid oxide fuel cells

Thermal and Chemical Expansion in Proton Ceramic Electrolytes and Compatible Electrodes

Cobalt based layered perovskites as cathode material for intermediate temperature Solid Oxide Fuel Cells: A brief review

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