Performance of XSCoF (X=Ba, La and Sm) and LSCrX′ (X′=Mn, Fe and Al) perovskite-structure materials on LSGM electrolyte for IT-SOFC

Peña-Martínez, J.; Marrero-López, D.; Pérez-Coll, Domingo; Ruiz-Morales, J.C.; Núñez, Pedro

doi:10.1016/j.electacta.2006.09.004

Cited by 99 publications

(60 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The dense electrode material obtained suggested that is necessary to use a pore former additionally to the binder used, such as graphite, and probably in high ratios, 30-50%. On the other hand, the catalytic activity could be improved, producing high specific surface area chromites, through precursors synthetic methods (25)(26)(27)(28) as alternative to the solid state route reported in this work.…”

Section: Eq2mentioning

confidence: 99%

Cromitas de Lantano como potencial electrodos simétricos para Pilas de Combustible de Óxido Sólido

Ruiz-Morales¹,

Lincke²,

Marrero-López³

et al. 2007

Bol. Soc. Esp. Ceram. Vidr.

Self Cite

View full text Add to dashboard Cite

A commonly used interconnector material has been tested as electrode for a new concept of Solid Oxide Fuel Cell, where the same material could be used, simultaneously, as interconnector, anode and cathode. We have found that a typical substituted chromite, such as La 0.7 Ca 0.3 CrO 3-δ (LCC) can be considered a good candidate for such configuration, due to its high electronic conductivity in both reducing and oxidising conditions, and moderate catalytic properties for oxygen reduction and hydrogen oxidation. The symmetrical design renders performances of 100 mWcm -2 at 950ºC, using O 2 and H 2 as oxidant and fuel respectively. Performances exceeding 300 mWcm -2 can be predicted for a 100µm-thick YSZ electrolyte. Keywords: Solid Oxide Fuel Cell, symmetrical electrodes, interconnector, YSZ, Chromites Cromitas de Lantano como potencial electrodos simétricos para Pilas de Combustible de Óxido SólidoUn material comúnmente utilizado como interconector ha sido probado como electrodo para un nuevo concepto de Pila de Combustible de Óxidos Sólido, en el cual el mismo material se utiliza, simultáneamente, como interconector, ánodo y cátodo. Hemos encontrado que una cromita típica como La 0.7 Ca 0.3 CrO 3-δ (LCC) puede ser considerada una buena candidata para dicha configuración, debido a sus altas conductividades eléctricas tanto en condiciones reductoras como oxidantes y una aceptable actividad catalítica para la reducción del oxígeno y la oxidación del hidrógeno. El diseño simétrico permite obtener rendimientos del orden de 100mWcm -2 a 950ºC, utilizando O 2 e H 2 como oxidante y combustible, respectivamente. Rendimientos que superan los 300mWcm -2 pueden predecirse para pilas con electrolitos de YSZ de 100 µm de grosor.

show abstract

Section: Eq2mentioning

confidence: 99%

Cromitas de Lantano como potencial electrodos simétricos para Pilas de Combustible de Óxido Sólido

Ruiz-Morales¹,

Lincke²,

Marrero-López³

et al. 2007

Bol. Soc. Esp. Ceram. Vidr.

Self Cite

View full text Add to dashboard Cite

show abstract

“…1. In this case: [7] Thus, values of R e could be calculated from a linear dependence fit: [8] where A= (R o +R η ) and B=(R o +R η )/R e are regression parameters. One should notice that [9] therefore, the oxygen ion transference numbers were calculated as: [10] where t e is the electron transference number, and R total is the overall resistance of the sample, measured independently by impedance spectroscopy.…”

Section: Determination Of the Ion Transport Numbers By A Modified Emfmentioning

confidence: 99%

“…One of the most promising compositions is La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 2.85 (LSGM) material, which has been investigated as solid electrolyte for intermediate temperature solid oxide fuel cell (IT-SOFC) applications (7,8). LSGM exhibits higher ionic conductivity than the-state-of-the-art yttria stabilised zirconia, with a typical value of 0.1 Scm -1 at 1073 K and ionic transport numbers greater than 0.99.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Determinación de los números de transporte iónico de materiales basados en el galato de lantano mediante técnicas de espectroscopia de impedancia y FEM

Peña-Martínez¹,

Marrero-López²,

Ruiz-Morales³

et al. 2008

Bol. Soc. Esp. Ceram. Vidr.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Lanthanides have a positive effect in the electrochemical activity for oxygen reduction due to their redox couples (like Pr +3 ↔Pr +4 or Sm +3 ↔Sm +2 ) and their controlled basicity. Different studies have shown the effect of the lanthanide nature in Ln 1-x Sr x Co 0.2 Fe 0.8 O 3-δ -like electrodes [12,13,14] as IT-SOFC cathodes. However, these studies have been conducted in terms of the electrochemical performance when just one lanthanide is partially-substituting the basic strontium ferrite-cobaltite structure.…”

mentioning

confidence: 99%

Improvement of the Electrochemical Performance of Ln_0.58Sr_0.4Fe_0.8Co_0.2O_3 – δ IT‐SOFC Cathodes by Ternary Lanthanide Combinations (La‐Pr‐Sm)

Vert

Serra

2010

Fuel Cells

View full text Add to dashboard Cite

Active perovskite‐based SOFC cathodes have been developed through lanthanide combination in the (La1 – x – yPrxSmy)0.58Sr0.4Fe0.8Co0.2O3 – δ system following a ternary mixture experimental design. These compositions were prepared through a sol–gel method and characterised by electrochemical impedance spectroscopy (EIS) as symmetrical cells on GDC‐electrolyte samples in the 450–650 °C temperature range. The electrochemical properties of the single lanthanide‐based Ln0.58Sr0.4Fe0.8Co0.2O3 – δ compounds were enhanced when different lanthanides were combined together in the same crystalline structure. The observed improvement does not follow a mere additional effect of the performance from the parent Ln0.58Sr0.4Fe0.8Co0.2O3 – δ compounds, i.e. it does not follow a linear behaviour, and the better performance is ascribed to synergetic catalytic effects among lanthanide cations. A reduction in electrode polarisation resistance with respect to non‐substituted compositions is stated for most Ln0.58Sr0.4Fe0.8Co0.2O3 – δ electrode compositions combining two or three lanthanides. Samarium addition to the electrode material involves a substantial reduction in the activation energy and the reduction degree is directly dependant on the samarium amount incorporated in the lattice. The best performing composition comprises a praseodymium‐rich lanthanum‐based electrode material. The experimental data derived from the ternary mixture design were modelled using nonlinear functions and this modelling allowed finding an electrode composition minimising the polarisation resistance while maintaining the activation energy at reduced values. Selected cathode compositions were tested in fully assembled anode‐supported cells and electrochemical characterisation supports the cooperative effect of lanthanide combination.

show abstract

Performance of XSCoF (X=Ba, La and Sm) and LSCrX′ (X′=Mn, Fe and Al) perovskite-structure materials on LSGM electrolyte for IT-SOFC

Cited by 99 publications

References 32 publications

Cromitas de Lantano como potencial electrodos simétricos para Pilas de Combustible de Óxido Sólido

Cromitas de Lantano como potencial electrodos simétricos para Pilas de Combustible de Óxido Sólido

Determinación de los números de transporte iónico de materiales basados en el galato de lantano mediante técnicas de espectroscopia de impedancia y FEM

Improvement of the Electrochemical Performance of Ln_0.58Sr_0.4Fe_0.8Co_0.2O_3 – δ IT‐SOFC Cathodes by Ternary Lanthanide Combinations (La‐Pr‐Sm)

Contact Info

Product

Resources

About

Performance of XSCoF (X=Ba, La and Sm) and LSCrX′ (X′=Mn, Fe and Al) perovskite-structure materials on LSGM electrolyte for IT-SOFC

Cited by 99 publications

References 32 publications

Cromitas de Lantano como potencial electrodos simétricos para Pilas de Combustible de Óxido Sólido

Cromitas de Lantano como potencial electrodos simétricos para Pilas de Combustible de Óxido Sólido

Determinación de los números de transporte iónico de materiales basados en el galato de lantano mediante técnicas de espectroscopia de impedancia y FEM

Improvement of the Electrochemical Performance of Ln0.58Sr0.4Fe0.8Co0.2O3 – δ IT‐SOFC Cathodes by Ternary Lanthanide Combinations (La‐Pr‐Sm)

Contact Info

Product

Resources

About

Improvement of the Electrochemical Performance of Ln_0.58Sr_0.4Fe_0.8Co_0.2O_3 – δ IT‐SOFC Cathodes by Ternary Lanthanide Combinations (La‐Pr‐Sm)