Electrochemical characterization of Pr2CuO4–Ce0.9Gd0.1O1.95 composite cathodes for solid oxide fuel cells

Kolchina, L. M.; Лысков, Н. В.; Петухов, Д. И.; Мазо, Г. Н.

doi:10.1016/j.jallcom.2014.03.179

Cited by 23 publications

(7 citation statements)

References 26 publications

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“…By increasing the Cu content, the amount of (PNCO-t2) phase considerably increases compared to (PNCO-t1). It should be noted that Pr2CuO4 (Cu end member of the RP-phase family) usually has the tetragonal structure with I4/mmm space group which is very similar to (PNCO-t2) detected in this study [49][50][51][52][53]. This transition from orthorhombic to tetragonal phases can be attributed to the Jahn-Teller effect, associated with Cu incorporation in the RP-phase structure [23].…”

Section: Phase Analysissupporting

confidence: 77%

Improving oxygen incorporation rate on (La0.6Sr0.4)0.98FeO3-δ via Pr2Ni1-xCuxO4+δ surface decoration

Khoshkalam

Tripković

Tong

et al. 2020

Journal of Power Sources

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Section: Phase Analysissupporting

confidence: 77%

Improving oxygen incorporation rate on (La0.6Sr0.4)0.98FeO3-δ via Pr2Ni1-xCuxO4+δ surface decoration

Khoshkalam

Tripković

Tong

et al. 2020

Journal of Power Sources

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“…Despite these promising properties, there has been only limited success in producing low-resistance R-P oxygen electrodes. Of the cuprates [11], only praseodymium cuprate seems to have formidable properties [12] with the best demonstrated polarization at 0.41 Ω• cm 2 on a Gd-doped ceria (CGO) electrolyte at 700°C [13]. Within the set of R-P nickelates, La n + 1 Ni n O 3n + 1 has attracted much attention since it is both stable in contact with common electrolytes and exhibits relatively fast oxygen transport coefficients [10,14].…”

Section: Introductionmentioning

confidence: 99%

Oxygen electrode characteristics of Pr2NiO4+δ-infiltrated porous (La0.9Sr0.1)(Ga0.8Mg0.2)O3–δ

2015

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Pr 2 NiO 4+ δ was wet infiltrated into porous LSGM scaffolds to form solid oxide cell oxygen electrodes on LSGMelectrolyte symmetrical cells. The minimum calcination temperature required to form this nickelate phase was between 950°C and 1000°C. X-ray diffraction measurements of electrodes tested at 650°C showed little evidence of any phase change, in contrast to 650°C annealed Pr 2 NiO 4+ δ powders that decomposed to Pr 4 Ni 3 O 10 and Pr 6 O 11 . Polarization resistance followed an Arrhenius temperature dependence with an activation barrier of 1.40 eV, and a value as low as 0.11 Ω•cm 2 was observed at 650°C for a Pr 2 NiO 4+ δ loading of 14 vol.%. The present resistance values appear to be the lowest reported to date for a Ruddlesden-Popper phase electrode, and are competitive with perovskite-structure electrodes. The low resistance, combined with the good stability of infiltrated Pr 2 NiO 4+ δ and the advantages of being Co-and Sr-free, make this an exciting new contender for intermediate-temperature solid oxide cell applications.

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“…A single-phase PCO sample was obtained using a modified freeze drying method according to the tech nique described in [20]. The sample phase composi tion was confirmed by X ray powder diffraction data (XRD) recorded on a Huber G670 diffractometer (the CuK α1 radiation, the range of 2θ 20°-70°).…”

Section: Synthesis Of Fine Pr 2 Cuo 4 Powder and Formation Of Pco-gdcmentioning

confidence: 99%

“…The effect of such parameters as the thickness of PCO and its morphology (including porosity) on the electrochemical characteristics of PCO-based electrodes was analyzed in detail in [20]. A typical image of the composite electrode layer on the surface of the GDC solid electrolyte obtained using the SEM technique is shown in Fig.…”

Section: Oxygen Reduction On the Surface Of Pco-gdc Composite Cathodesmentioning

confidence: 99%

Optimization of composite cathode based on praseodymium cuprate for intermediate-temperature solid oxide fuel cells

et al. 2015

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A complex study of conducting and catalytic properties of composite materials of Pr 2 CuO 4 -xCe 0.9 Gd 0.1 O 1.95 (x = 20, 33, 50 wt %) is carried out. Conductivity of composites is measured using a four probe technique in air. Analysis of the dependence of conductivity on the composition at a given temperature shows that the conducting properties of composites can be described based on the percolation model. Elec trocatalytic properties of composite cathodes supported on the surface of the Ce 0.9 Gd 0.1 O 1.95 (GDC) solid electrolyte using the screen printing technique were studied by the impedance spectroscopy technique in the range of oxygen partial pressures of 10 -2 to 0.21 atm at the temperatures of 500-900°C. Analysis of polariza tion resistance (R η ) isotherms on the partial pressure of oxygen shows that the rate determining steps of the oxygen reduction reaction on the cathode are dissociation of adsorbed molecular oxygen and charge transfer. It is found that the minimum of polarization resistance corresponding to 0.4 Ohm cm 2 at 700°C in air is reached in the range of intermediate temperatures (500-750°C) for the composition containing 33 wt % GDC. On the basis of the obtained data, the PCO-33GDC composite can be considered as a promising cathode material for intermediate-temperature solid oxide fuel cells.

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Electrochemical characterization of Pr2CuO4–Ce0.9Gd0.1O1.95 composite cathodes for solid oxide fuel cells

Cited by 23 publications

References 26 publications

Improving oxygen incorporation rate on (La0.6Sr0.4)0.98FeO3-δ via Pr2Ni1-xCuxO4+δ surface decoration

Improving oxygen incorporation rate on (La0.6Sr0.4)0.98FeO3-δ via Pr2Ni1-xCuxO4+δ surface decoration

Oxygen electrode characteristics of Pr2NiO4+δ-infiltrated porous (La0.9Sr0.1)(Ga0.8Mg0.2)O3–δ

Optimization of composite cathode based on praseodymium cuprate for intermediate-temperature solid oxide fuel cells

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