Oxides of the AMO3 and A2MO4-type: structural stability, electrical conductivity and thermal expansion

Daroukh, Mahmoud Al

doi:10.1016/s0167-2738(02)00773-7

Cited by 224 publications

(130 citation statements)

References 17 publications

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“…However, the O-interstitial migration dominates the ionic conductivity due to the higher mobility of these defects. 29,30 The ionic conductivity of the nickelates has been shown to be comparable to that of YSZ, 31 The oxygen hyper-stoichiometry also induces Ni oxidation, generating electron-hole charge carriers 33 that contribute to p-type electronic conductivity. This, together with the oxygen ionic transport, guarantees the mixed conductivity of these materials.…”

mentioning

confidence: 98%

Determination of Electrode Oxygen Transport Kinetics Using Electrochemical Impedance Spectroscopy Combined with Three-Dimensional Microstructure Measurement: Application to Nd₂NiO_4+δ

Yakal-Kremski

Mogni

Montenegro-Hernández

et al. 2014

J. Electrochem. Soc.

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Oxygen reduction kinetic parameters -oxygen ion diffusion D δ , molar surface exchange rate O and surface exchange coefficient k -were determined for porous Nd 2 NiO 4+δ solid oxide fuel cell cathodes as a function of temperature and oxygen partial pressure by analyzing electrochemical impedance spectroscopy data using the Adler-Lane-Steele model. Electrode microstructural data used in the model calculations were obtained by three-dimensional focused ion beam-scanning electron microscope tomography. Cathodes were fabricated using Nd 2 NiO 4+δ powder derived from a sol-gel method and were tested as symmetrical cells with LSGM electrolytes. The oxygen surface exchange rate exhibited a power-law dependency with oxygen partial pressure, whereas the oxygen diffusivity values obtained varied only slightly. The present analysis suggests that the O-interstitial diffusion has a bulk transport path, whereas the surface exchange process involves dissociative adsorption on surface sites followed by O-incorporation. For Nd 2 NiO 4+δ at 700 • C and 0.2 atm oxygen pressure, D δ = 5.6 · 10 −8 cm 2 s −1 , O = 2.5 · 10 −8 mol · cm −2 s −1 . The present D δ and O values and their activation energies are slightly different to those previously reported for Nd 2 NiO 4+δ using other measurement methodologies, and lower than typical state-of-the-art Co-rich perovskites. However, the average k δ = 1.0 10 −5 cm · s −1 at 700 • C is comparable to those of fast oxygen exchange rate perovskites.

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mentioning

confidence: 98%

Determination of Electrode Oxygen Transport Kinetics Using Electrochemical Impedance Spectroscopy Combined with Three-Dimensional Microstructure Measurement: Application to Nd₂NiO_4+δ

Yakal-Kremski

Mogni

Montenegro-Hernández

et al. 2014

J. Electrochem. Soc.

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“…Increasing the number of perovskite layers in the RP structure with higher n-value result in increasing concentration of Ni-O-Ni bonds in charge of electronic conduction pathways of perovskite layers, leading to high electrical conductivity. 4,[19][20][21][22][23][24] To fabricate nano-sized La 4 Ni 3 O 10-δ composites, the infiltration method is chosen because it can provide reduced particle size of La 4 Ni 3 O 10-δ by separating the sintering process of the cathode from that of the electrolyte. 4,22,25 The low sintering temperature required in the infiltration method is a key factor for the fabrication of La 4 Ni 3 O 10-δ nanocomposites, because high sintering temperature gives rise to reactions between the constituents, growth of the particle size, and the formation of a thin film.…”

mentioning

confidence: 99%

Scale-Down and Sr-Doping Effects on La₄Ni₃O_10-δ–YSZ Nanocomposite Cathodes for IT-SOFCs

Kim

Choi

Jun

et al. 2014

J. Electrochem. Soc.

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Among the Ruddlesden-Popper series, La n+1 Ni n O 3n+1 (n = 1, 2, and 3) has attracted tremendous attention as an intermediate temperature solid oxide fuel cell (IT-SOFC) cathode because of its favorable properties for realizing high performance. Inter alia, La 4 Ni 3 O 10-δ (n = 3) has in particular gained recognition as a promising cathode material owing to its high electrical conductivity and cell performance in IT-SOFC applications. The fabrication of nano-sized La 4 Ni 3 O 10-δ composites requires a low sintering temperature process because high sintering temperature gives rise to solid state reactions between the constituents, which leads to the formation of an undesired electrical insulator and the formation of a low surface area thin-film on the surface. The infiltration method is therefore chosen to fabricate nano-sized La 4 Ni 3 O 10-δ composites because it can provide reduced particle size of La 4 Ni 3 O 10-δ by separating the sintering process of the cathode from the high temperature sintering process of the electrolyte. In this work, we investigated the electrochemical properties of La 4 Ni 3 O 10-δ composites prepared by an infiltration method in terms of application as an IT-SOFC cathode material as well as the effect of strontium doping at La sites. A fuel cell converts chemical energy to electrical energy by using hydrogen or hydrocarbon as fuel. Inter alia, a solid oxide fuel cell (SOFC) is a promising power generation device with high efficiency, excellent performance, low emissions, and attractive fuel flexibility at high operating temperature. Nevertheless, high operating temperature gives rise to some drawbacks such as interface reactions between cell components, electrode phase transitions, restrictions on choice of materials, and so on. The key to solving those problems lies in developing intermediate-temperature SOFCs (IT-SOFCs) (500-700• C). 1,2However, the low operating temperature gives rise to poor activity for the oxygen reduction reaction (ORR) at the cathode. Accordingly, the development of cathode materials with high electro-catalytic activity and excellent durability is necessary for commercialization of IT-SOFCs. [3][4][5] In this respect, mixed ionic electronic conductors (MIECs) based on transition metal (e.g. Mn, Fe, Co, and Ni) oxides have received remarkable attention. 3,4,6 MIECs have the capability to conduct oxygen ions and electrons simultaneously, which leads to an increase of electrochemical reactive sites. It is generally accepted that the entire surface of MIECs may work as reactive sites for the ORR, because the ORR can occur at not only the triple phase boundary (TPB) but also the two phase boundary (2PB).6,7 Specifically, the TPB is a reaction site where the gas phase meets the electronic and ionic conducting phases at the electrode-electrolyte interface. In the case of MIECs, the ORR also occurred at the 2PB, which corresponds with the interface boundaries between MIECs and oxygen gas.Among various MIECs, cobalt containing oxides such as LaCoO 3 , PrCoO 3 , and...

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“…The measurements were performed at OCV as a function of temperature (550-750 °C) and oxygen partial pressure (in an N2/O2 mixed atmosphere). The DC polarization experiments were performed by the chronoamperometry methods, as that explained in Reference [8].…”

Section: Methodsmentioning

confidence: 99%

“…Studies have shown that materials with K2NiF4-type structure exhibited promising cathode properties in IT-SOFC system. Compared to their perovskite cousins, K2NiF4-type materials possess improved thermal stability, compatible thermal expansion coefficients with these commercially available electrolytes (YSZ, CGO, SDC et al), and applauding oxygen diffusion and surface exchange coefficients [7], [8], [9] and [10]. Mauvy et al studied Ln2NiO4+δ (Ln = La, Nd, Pr) series materials, and found Nd1.95NiO4 exhibited promising electrode properties.…”

Section: Introductionmentioning

confidence: 99%

Study on Sm1.8Ce0.2CuO4–Ce0.9Gd0.1O1.95 composite cathode materials for intermediate temperature solid oxide fuel cell

Sun¹,

Zhao²,

Li³

et al. 2011

International Journal of Hydrogen Energy

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Sm1.8Ce0.2CuO4-xCe0.9Gd0.1O1.95 (SCC-xCGO, x = 0-12 vol.%) composite cathodes supported on Ce0.9Gd0.1O1.95 (CGO) electrolyte are studied for applications in IT-SOFCs. Results show that Sm1.8Ce0.2CuO4 material is chemically compatible with Ce0.9Gd0.1O1.95 at 1000 °C. The composite electrode exhibits optimum microstructure and forms good contact with the electrolyte after sintering at 1000 °C for 4 h. The polarization resistance (Rp) reduces to the minimum value of 0.17 Ω cm 2 at 750 °C in air for SCC-CGO06 composite cathode. The relationship between Rp and oxygen partial pressure indicates that the reaction rate-limiting step is the surface diffusion of the dissociative adsorbed oxygen on the composite cathode. K Ke ey yw wo or rd ds s: : Solid oxide fuel cell (SOFC); composite cathode; Oxygen reduction reaction (ORR)

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Oxides of the AMO3 and A2MO4-type: structural stability, electrical conductivity and thermal expansion

Cited by 224 publications

References 17 publications

Determination of Electrode Oxygen Transport Kinetics Using Electrochemical Impedance Spectroscopy Combined with Three-Dimensional Microstructure Measurement: Application to Nd₂NiO_4+δ

Determination of Electrode Oxygen Transport Kinetics Using Electrochemical Impedance Spectroscopy Combined with Three-Dimensional Microstructure Measurement: Application to Nd₂NiO_4+δ

Scale-Down and Sr-Doping Effects on La₄Ni₃O_10-δ–YSZ Nanocomposite Cathodes for IT-SOFCs

Study on Sm1.8Ce0.2CuO4–Ce0.9Gd0.1O1.95 composite cathode materials for intermediate temperature solid oxide fuel cell

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Oxides of the AMO3 and A2MO4-type: structural stability, electrical conductivity and thermal expansion

Cited by 224 publications

References 17 publications

Determination of Electrode Oxygen Transport Kinetics Using Electrochemical Impedance Spectroscopy Combined with Three-Dimensional Microstructure Measurement: Application to Nd2NiO4+δ

Determination of Electrode Oxygen Transport Kinetics Using Electrochemical Impedance Spectroscopy Combined with Three-Dimensional Microstructure Measurement: Application to Nd2NiO4+δ

Scale-Down and Sr-Doping Effects on La4Ni3O10-δ–YSZ Nanocomposite Cathodes for IT-SOFCs

Study on Sm1.8Ce0.2CuO4–Ce0.9Gd0.1O1.95 composite cathode materials for intermediate temperature solid oxide fuel cell

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Determination of Electrode Oxygen Transport Kinetics Using Electrochemical Impedance Spectroscopy Combined with Three-Dimensional Microstructure Measurement: Application to Nd₂NiO_4+δ

Determination of Electrode Oxygen Transport Kinetics Using Electrochemical Impedance Spectroscopy Combined with Three-Dimensional Microstructure Measurement: Application to Nd₂NiO_4+δ

Scale-Down and Sr-Doping Effects on La₄Ni₃O_10-δ–YSZ Nanocomposite Cathodes for IT-SOFCs