Permeation and oxygen exchange of Ln2Ni0.8Cu0.2O4-materials (Ln = La, Pr, Nd)

Ziesche, Steffen; Jurk, Robert; Trofimenko, Nikolai; Kusnezoff, M.

doi:10.1016/j.ssi.2008.01.096

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…However, a large spreading of D O values is observed with oxygen semi-permeation measurements, particularly, at the lowest temperatures (< 800°C). [31].…”

Section: Rate Determining Step Of the Oxygen Flux Through The Membranementioning

confidence: 99%

Evaluating oxygen diffusion, surface exchange and oxygen semi-permeation in Ln2NiO4+δ membranes (Ln=La, Pr and Nd)

Geffroy

Reichmann

Chartier

et al. 2014

Journal of Membrane Science

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Grenier. Oxygen diffusion, surface exchange and oxygen semi-permeation performances of Ln2NiO4+δ membranes (Ln = La, Pr and Nd). Journal of Membrane Science, Elsevier, 2014, 451, pp. ABSTRACTIn order to clearly identify the rate determining step (rds) in oxygen semi-permeation of dense Ln 2 NiO 4+δ membranes (with Ln = La, Pr and Nd), a specific setup has been designed, which allowed measuring the oxygen semi-permeation flux as well as the oxygen activity gradient at both membrane surfaces. From the results of the measurements, the coefficients of oxygen diffusion and surface exchange at both membrane surfaces have been determined. Their values have been compared with the values reported in the literature for similar membrane materials. The main conclusion is that the oxygen flux through these membranes is limited by the oxygen surface exchange at the oxygen-lean face, and not, as previously claimed, by oxygen volume diffusion.

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“…However, a large spreading of D O values is observed with oxygen semi-permeation measurements, particularly, at the lowest temperatures (< 800°C). [31].…”

Section: Rate Determining Step Of the Oxygen Flux Through The Membranementioning

confidence: 99%

Evaluating oxygen diffusion, surface exchange and oxygen semi-permeation in Ln2NiO4+δ membranes (Ln=La, Pr and Nd)

Geffroy

Reichmann

Chartier

et al. 2014

Journal of Membrane Science

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“…Non‐stoichiometric oxide in A 2 BO 4 is perovskite‐like structure and intercalated by oxygen ions, which have better cathode performance than perovskite structure in ABO 3 15–17. It is shown that the oxygen transfer coefficient of La 2 Ni 0.5 Co 0.5 O 4 materials at 20–1000°C is as 10 times as perovskite structure (La,Sr)MnO 3 .…”

Section: Introductionmentioning

confidence: 99%

The performance of cathode material of perovskite-like La-Ni-M-O for low temperature solid oxide fuel cell

Sun

et al. 2010

Int. J. Energy Res.

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SUMMARYThe low temperature solid oxide fuel cells have recently drawn much more attention due to reducing the corrosion, easing the sealing and avoiding the large hot stress cycling and high costs. In this circumstance, the overpotential of polarization in the cathode will become large and the conductivity will become much lower with reducing the temperature. A novel type of La 2 Ni x M 1-x O 4 (x 5 0.2-0.5) (M 5 Cu, Co) perovskite-like oxide was synthesized and studied as the cathode for low-temperature, 400-6001C, solid oxide fuel cells. The microstructure, electrical conductivity and fuel cell performances are investigated. The substitution of Cu or Co for Ni in the perovskite-like oxide improved the electrical conductivity of the cathode materials. The maximum power density 312 mW cm À2with the perovskite-like oxide cathode was obtained in the low temperature, 5501C.

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