La0.8Sr0.2Fe0.8Cu0.2O3− as “cobalt-free” cathode for La0.8Sr0.2Ga0.8Mg0.2O3− electrolyte

Zurlo, Francesca; Bartolomeo, Elisabetta Di; D’Epifanio, Alessandra; Felice, V. Di; Sora, Isabella Natali; Tortora, Luca; Licoccia, Silvia

doi:10.1016/j.jpowsour.2014.07.183

Cited by 57 publications

(29 citation statements)

References 27 publications

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“…The density was measured by the Archimedes method. The electrical conductivities were evaluated as a function of temperature and oxygen partial pressure, using Keithley 2400 multimeter from 100°C to 800°C at an interval of 50°C …”

Section: Methodsmentioning

confidence: 99%

Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Feng

Yuan³

et al. 2019

Int J Energy Res

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Summary Reducing the operating temperature is the developing trend for solid oxide fuel cells. The key is to develop the cathode with high electrocatalytic activity for oxygen reduction reaction operated at reduced temperatures. Ba‐deficient Ba1 − xBi0.05Co0.8Nb0.15O3 − δ (Ba1 − xBCN, 0 ≤ x ≤ 0.10) are synthesized by solid‐state reaction method and evaluated as novel cathodes for intermediate‐temperature solid oxide fuel cells. Ba1 − xBCN is preserved to primitive cubic perovskite phase and meets the compatibility requirement with gadolinium doped ceria oxide (GDC) electrolyte at 950°C. Though the Ba deficiency distorts the cell symmetry, it improves the charge transfer steps rapidly, ascribing to the improvement of oxygen vacancy concentration. The polarization resistance of Ba0.95BCN is as low as 0.056 Ω cm2 in air at 700°C. The peak power density of the single cell with this cathode is as high as 1.41 W cm−2 at 750°C with wet H2 as fuel and air as oxidant, indicating the great potential for enhanced performance of Co‐based cathodes with A‐site deficiency.

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Section: Methodsmentioning

confidence: 99%

Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Feng

Yuan³

et al. 2019

Int J Energy Res

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“…Polarization curves and electrochemical impedance spectroscopy measurements were performed using a potentiostat/galvanostat/FRA PARSTAT 2273. Further experimental details are reported in a previous paper …”

Section: Methodsmentioning

confidence: 99%

Fabrication and Testing of Copper/Gadolinium‐Doped Ceria‐Based Solid Oxide Fuel Cells Operating at Intermediate Temperature

et al. 2018

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Planar solid oxide fuel cells (SOFC) with CuO/gadolinium‐doped ceria (GDC) supporting anode were produced and tested in H2 and in CH4/CO2 mixture at 650 °C. The electrolyte densification at 900 °C was promoted by compressive strains induced by larger anodic thickness. The reduction behaviour of CuO/GDC anodic powders was preliminarily evaluated. The electrochemical measurements showed an increasing power density with the anode thickness (from ≈500 μm to ≈1.4 mm) reaching a maximum value of 227 mW cm−2 at 650 °C in pure H2. Power density of 29 mW cm−2 was measured in wet CH4/CO2 biogas mixture at 650 °C. Catalytic activity measurements towards methane dry reforming showed limited conversion at all investigated temperatures, this suggesting that the actual anodic reaction is the methane combustion. Scanning electron microscope observations and energy dispersive X‐ray analyses of the cell tested in CH4/CO2 mixture did not show any carbon deposit, thus pointing out that the Cu/GDC cermet can be considered a stable and reliable anodic substrate for IT‐SOFC fed by CH4/CO2 mixture.

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“…Furthermore, volatility of these cobalt‐based oxides at elevated temperatures and the relatively high price of cobalt also limit their practical application as cathode materials in IT‐SOFCs. Thus, the development of Co‐free perovskite‐type cathodes has been receiving growing interest in recent years …”

Section: Introductionmentioning

confidence: 99%

“…Thus, the development of Co-freep erovskite-type cathodes has been receivingg rowing interesti nr ecent years. [14][15][16][17] As at ypical Fe-based cobalt-free perovskite oxide,B aFeO 3Àd provedt ob eapromising cobalt-free cathode material of IT-SOFCsw ith high surface exchange kinetics and high ORR electrocatalytic activity. [15] However,o wing to its large Goldschmidt tolerance factor (t = 1.006), [18] as ingle cubic phase BaFeO 3Àd could not be obtaineda tr oom temperature with various synthesis methods, such as solid-state and sol-gel reactions, and more complicated fabrication methods are required to obtain such ap ure phase.…”

Section: Introductionmentioning

confidence: 99%

Structures and Properties of LaFe_0.8Cu_0.2O_3−δ and BaFe_0.8Cu_0.2O_3−δ as Cobalt‐Free Perovskite‐Type Cathode Materials for the Oxygen Reduction Reaction

et al. 2018

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Perovskite oxides with mixed electronic–ionic conduction are important catalysts for the oxygen reduction reaction in solid oxide fuel cells (SOFCs). Here, two cobalt‐free perovskite oxides, LaFe0.8Cu0.2O3−δ (LFCuO) and BaFe0.8Cu0.2O3−δ (BFCuO), were synthesized and comparatively studied with respect to their phase structures, oxygen contents, chemical defects, thermal expansion coefficient (TEC), as well as electrical and electrochemical properties. Different structures and properties have been found for each oxide, which have been interpreted based on their tolerance factors and chemical defects. LFCuO showed much better overall performance than BFCuO, and it proved to be a promising cobalt‐free cathode material of intermediate‐temperature SOFCs with a low TEC (12.0×10−6 °C−1) that matches well with TECs of the electrolytes, high catalytic activity for the oxygen reduction reaction characterized by low area specific resistances (0.090 Ω cm2 at 800 °C and 0.20 Ω cm2 at 750 °C), and high‐temperature chemical stability with electrolytes.

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La0.8Sr0.2Fe0.8Cu0.2O3− as “cobalt-free” cathode for La0.8Sr0.2Ga0.8Mg0.2O3− electrolyte

Cited by 57 publications

References 27 publications

Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Fabrication and Testing of Copper/Gadolinium‐Doped Ceria‐Based Solid Oxide Fuel Cells Operating at Intermediate Temperature

Structures and Properties of LaFe_0.8Cu_0.2O_3−δ and BaFe_0.8Cu_0.2O_3−δ as Cobalt‐Free Perovskite‐Type Cathode Materials for the Oxygen Reduction Reaction

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La0.8Sr0.2Fe0.8Cu0.2O3− as “cobalt-free” cathode for La0.8Sr0.2Ga0.8Mg0.2O3− electrolyte

Cited by 57 publications

References 27 publications

Promotion on electrochemical performance of Ba‐deficient Ba1 − xBi0.05Co0.8Nb0.15O3 − δcathode for intermediate temperature solid oxide fuel cells

Promotion on electrochemical performance of Ba‐deficient Ba1 − xBi0.05Co0.8Nb0.15O3 − δcathode for intermediate temperature solid oxide fuel cells

Fabrication and Testing of Copper/Gadolinium‐Doped Ceria‐Based Solid Oxide Fuel Cells Operating at Intermediate Temperature

Structures and Properties of LaFe0.8Cu0.2O3−δ and BaFe0.8Cu0.2O3−δ as Cobalt‐Free Perovskite‐Type Cathode Materials for the Oxygen Reduction Reaction

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Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Structures and Properties of LaFe_0.8Cu_0.2O_3−δ and BaFe_0.8Cu_0.2O_3−δ as Cobalt‐Free Perovskite‐Type Cathode Materials for the Oxygen Reduction Reaction