Perovskite related cuprate phases as potential cathode materials for solid oxide fuel cells

Sansom, J.E.H.; Rudge-Pickard, H; Smith, Graham T.; Slater, Peter R.; Islam, Mohammad Saiful

doi:10.1016/j.ssi.2004.09.035

Cited by 15 publications

(14 citation statements)

References 9 publications

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“…However, increasing the temperature to 950 C resulted in the formation of Y 1.5 Ce 0.5 Sr 2 Cu 2 CoO 9þd . This is consistent with a previous electrolyte compatibility study on YSr 2 Cu 2-CoO 7 with GDC10 which also showed the presence of Y 1.5 Ce 0.5 Sr 2 Cu 2 CoO 9þd after annealing at 1000 C for 1 week [31].…”

Section: Stability With Electrolytessupporting

confidence: 93%

“…This is in good agreement with literature values for related phases, e.g. an oxygen content of YSr 2 Cu 2 CoO 7.03(4) was determined for the parent non-substituted phase by Sansom et al [31] using thermogravimetric methods. This implies that the oxygen content is invariant as Co is substituted into the structure, requiring variation in the Y:Sr ratio to compensate the charges.…”

Section: Synthesis and Phase Stabilitysupporting

confidence: 91%

“…The initial syntheses followed the literature synthesis conditions for the parent phase YSr 2 Cu 2 CoO 7 (1000 C for 16 h) [31]. Samples of YSr 2 Cu 3Àx Co x O 7þd with x ¼ 1.00 and 1.10 were prepared as single phases, with all diffraction lines indexed on the basis of a 6a p Â a p √2 Â a p √2 body-centred unit cell.…”

Section: Synthesis and Phase Stabilitymentioning

confidence: 99%

“…The electronic properties of YSr 2 Cu 2 MO 7þd (M ¼ Fe, Co) were studied by Sansom et al [30,31], who reported a p-type semiconductor with a total conductivity of 15 S cm À1 at 800 C, whilst thermogravimetric analysis showed that no oxygen loss occurred in the temperature range 25e900 C under air and nitrogen atmospheres. The material was found to be reactive towards the common electrolytes La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 2.85 , YSZ, GDC and apatite at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Control of Co content and SOFC cathode performance in Y 1−y Sr 2+y Cu 3−x Co x O 7+δ

Simo

Payne

Demont

et al. 2014

Solid State Sciences

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Section: Stability With Electrolytessupporting

confidence: 93%

Section: Synthesis and Phase Stabilitysupporting

confidence: 91%

Section: Synthesis and Phase Stabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Control of Co content and SOFC cathode performance in Y 1−y Sr 2+y Cu 3−x Co x O 7+δ

Simo

Payne

Demont

et al. 2014

Solid State Sciences

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“…Chemical compatibility studies 11 Chemical compatibility studies were performed between these samples and potential SOFC electrolytes, since in SOFC operation, any reaction may lead to potential problems at the interface between the electrolyte and electrode. Initial studies were carried out at 900ºC, and these were then repeated at a temperature of 1000ºC.…”

Section: Conductivity Studiesmentioning

confidence: 99%

Synthesis and characterisation of the perovskite-related cuprate phases YSr2Cu2MO7+y(M = Co, Fe) for potential use as solid oxide fuel cell cathode materials

et al. 2005

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In this paper we report the synthesis and characterisation of the perovskite cuprate phases YSr 2 Cu 2 MO 7+y (M=Co, Fe) to examine their potential for use as cathode materials in Solid Oxide Fuel Cells (SOFC). Both samples showed conductivities of ≈10 Scm -1 at 900°C and were also shown to be stable at this temperature in N 2 . For YSr 2 Cu 2 FeO 7+x , semiconducting behaviour was observed up to ≈550°C, with a decrease in conductivity at higher temperatures, attributed to oxygen loss reducing the charge carrier concentration.In the case of YSr 2 Cu 2 CoO 7+y , semiconducting behaviour was observed over the range of temperatures studied, although a small but significant steep increase in conductivity was observed above 800°C. High temperature X-ray diffraction studies of this particular phase showed that this increase in conductivity coincided with an orthorhombictetragonal structural transition, accompanied by a significant reduction in cell volume. In addition to measurements in air, conductivities were also measured with varying p(O 2 ) (0.2-10 -5 atm.) at 900°C, and this data showed significant hysteresis between measurements on reducing and re-oxidising, suggesting poor oxide ion transport, poor oxygen surface exchange kinetics, or significant structural changes on varying p(O 2 ).Chemical compatibility studies of these phases with SOFC electrolytes at temperatures between 900 and 1000°C showed reaction in all cases. In the case of CeO 2 based electrolytes, the reaction led to the formation of the "fluorite-block" phases, (Y/Ce) 2 Sr 2 Cu 3-x M x O 9+y (M=Co, Fe), and samples of these were subsequently prepared and the conductivities measured. Similar hysteresis between conductivity measurements on reducing and re-oxidising were also observed for these samples.

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Electrochemical performances of LaBaCuFeO5+x and LaBaCuCoO5+x as potential cathode materials for intermediate-temperature solid oxide fuel cells

Zhou

et al. 2009

Electrochemistry Communications

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Perovskite related cuprate phases as potential cathode materials for solid oxide fuel cells

Cited by 15 publications

References 9 publications

Control of Co content and SOFC cathode performance in Y 1−y Sr 2+y Cu 3−x Co x O 7+δ

Control of Co content and SOFC cathode performance in Y 1−y Sr 2+y Cu 3−x Co x O 7+δ

Synthesis and characterisation of the perovskite-related cuprate phases YSr2Cu2MO7+y(M = Co, Fe) for potential use as solid oxide fuel cell cathode materials

Electrochemical performances of LaBaCuFeO5+x and LaBaCuCoO5+x as potential cathode materials for intermediate-temperature solid oxide fuel cells

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