Effect of Sr 2+  and Ba 2+  doping on structural stability and mechanical properties of La 2 NiO 4+δ

Akbari‐Fakhrabadi, Ali; Toledo, E.G.; Canales, Jimena; Meruane, Viviana; Chan, Siew Hwa; Gracia-Pinilla, M.A.

doi:10.1016/j.ceramint.2018.03.077

Cited by 11 publications

(7 citation statements)

References 21 publications

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“…This was calculated as −∂δ/∂T in the temperature range above T c (T c values are related to the end of a low-temperature "plateau" on the curves when the oxygen exchange of the samples with the ambient air starts) was observed (Table 1). This is in agreement with temperature-programmed desorption of oxygen and TGA data for La 2 NiO 4+δ and other R-P phase samples, including the ones doped with alkaline earth metals [47][48][49][50][51]. The T c values did not show direct concentration dependence and were in the range of 270-340 • C, with the highest T c of 340 • C for LCNO01.…”

Section: Oxygen Over-stoichiometry Studiessupporting

confidence: 88%

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Correlation between Structural and Transport Properties of Ca-Doped La Nickelates and Their Electrochemical Performance

et al. 2021

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This work presents the results from a study of the structure and transport properties of Ca-doped La2NiO4+δ. La2−xCaxNiO4+δ (x = 0–0.4) materials that were synthesized via combustion of organic-nitrate precursors and characterized by X-ray diffraction (XRD), in situ XRD using synchrotron radiation, thermogravimetric analysis (TGA) and isotope exchange of oxygen with C18O2. The structure was defined as orthorhombic (Fmmm) for x = 0 and tetragonal (I4/mmm) for x = 0.1–0.4. Changes that occurred in the unit cell parameters and volume as the temperature changed during heating were shown to be caused by the excess oxygen loss. Typical for Ruddlesden–Popper phases, oxygen mobility and surface reactivity decreased as the Ca content was increased due to a reduction in the over-stoichiometric oxygen content with the exception of x = 0.1. This composition demonstrated its superior oxygen transport properties compared to La2NiO4+δ due to the enhanced oxygen mobility caused by structural features. Electrochemical data obtained showed relatively low polarization resistance for the electrodes with a low Ca content, which correlates well with oxygen transport properties.

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Section: Oxygen Over-stoichiometry Studiessupporting

confidence: 88%

“…La2NiO4+δ and other R-P phase samples, including the ones doped with alkaline earth metals [47][48][49][50][51]. The Tc values did not show direct concentration dependence and were in the range of 270-340 °C, with the highest Tc of 340 °C for LCNO01.…”

Section: Oxygen Over-stoichiometry Studiesmentioning

confidence: 94%

Correlation between Structural and Transport Properties of Ca-Doped La Nickelates and Their Electrochemical Performance

et al. 2021

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“…According to our best knowledge, we have used the highest temperature (1350 °C), at which chemical interactions of cerate-zirconates and nickelates were studied. Such excellent results in phase stability can be explained by the fact that Pr 2 NiO 4+δ is doped with barium, that compensates the Ba-concentration difference between two components and, therefore, diminishes a degree of chemical interaction [28,29].…”

Section: Resultsmentioning

confidence: 99%

A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr2NiO4+δ-Based Electrodes: Fabrication and Electrochemical Features

et al. 2018

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Reversible protonic ceramic cells (rPCCs) combine two different operation regimes, fuel cell and electrolysis cell modes, which allow reversible chemical-to-electrical energy conversion at reduced temperatures with high efficiency and performance. Here we present novel technological and materials science approaches, enabling a rPCC with symmetrical functional electrodes to be prepared using a single sintering step. The response of the cell fabricated on the basis of P–N–BCZD|BCZD|PBN–BCZD (where BCZD = BaCe0.5Zr0.3Dy0.2O3−δ, PBN = Pr1.9Ba0.1NiO4+δ, P = Pr2O3, N = Ni) is studied at different temperatures and water vapor partial pressures (pH2O) by means of volt-ampere measurements, electrochemical impedance spectroscopy and distribution of relaxation times analyses. The obtained results demonstrate that symmetrical electrodes exhibit classical mixed-ionic/electronic conducting behavior with no hydration capability at 750 °C; therefore, increasing the pH2O values in both reducing and oxidizing atmospheres leads to some deterioration of their electrochemical activity. At the same time, the electrolytic properties of the BCZD membrane are improved, positively affecting the rPCC’s efficiency. The electrolysis cell mode of the rPCC is found to be more appropriate than the fuel cell mode under highly humidified atmospheres, since its improved performance is determined by the ohmic resistance, which decreases with pH2O increasing.

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“…According to our best knowledge, we have used the highest temperature (1350 °C), at which chemical interactions of cerate-zirconates and nickelates were studied. Such excellent results in phase stability can be explained by the fact that Pr2NiO4+δ is doped with barium, that compensates the Ba-concentration difference between two components and, therefore, diminishes a degree of chemical interaction [28,29].…”

Section: Pr19ba01nio4+δ Functionalitymentioning

confidence: 99%

A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr<sub>2</sub>NiO<sub>4+δ</sub>-Based Electrodes: Fabrication and Electrochemical Features

Tarutin

Lyagaeva

Фарленков

et al. 2018

Preprint

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Reversible protonic ceramic cells (rPCCs) combine two different operation regimes, fuel cell and electrolysis cell modes, which allow reversible chemical-to-electrical energy conversion at reduced temperatures with high efficiency and performance. Here we present novel technological and materials science approaches, enabling a rPCC with symmetrical functional electrodes to be prepared using a single sintering step. The response of the cell fabricated on the basis of P–N–BCZD|BCZD|PBN–BCZD (where BCZD = BaCe0.5Zr0.3Dy0.2O3–δ, PBN = Pr1.9Ba0.1NiO4+δ, P = Pr2O3, N = Ni) is studied at different temperatures and water vapor partial pressures (pH2O) by means of volt-ampere measurements, electrochemical impedance spectroscopy and distribution of relaxation times analyses. The obtained results demonstrate that symmetrical electrodes exhibit classical mixed-ionic/electronic conducting behavior with no hydration capability at 750 °C; therefore, increasing the pH2O values in both reducing and oxidizing atmospheres leads to some deterioration of their electrochemical activity. At the same time, the electrolytic properties of the BCZD membrane are improved, positively affecting the rPCC’s efficiency. The electrolysis cell mode of the rPCC is found to be more appropriate than the fuel cell mode under highly humidified atmospheres, since its improved performance is determined by the ohmic resistance, which decreases with pH2O increasing.

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Effect of Sr 2+ and Ba 2+ doping on structural stability and mechanical properties of La 2 NiO 4+δ

Cited by 11 publications

References 21 publications

Correlation between Structural and Transport Properties of Ca-Doped La Nickelates and Their Electrochemical Performance

Correlation between Structural and Transport Properties of Ca-Doped La Nickelates and Their Electrochemical Performance

A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr2NiO4+δ-Based Electrodes: Fabrication and Electrochemical Features

A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr<sub>2</sub>NiO<sub>4+δ</sub>-Based Electrodes: Fabrication and Electrochemical Features

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Effect of Sr 2+ and Ba 2+ doping on structural stability and mechanical properties of La 2 NiO 4+δ

Cited by 11 publications

References 21 publications

Correlation between Structural and Transport Properties of Ca-Doped La Nickelates and Their Electrochemical Performance

Correlation between Structural and Transport Properties of Ca-Doped La Nickelates and Their Electrochemical Performance

A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr2NiO4+δ-Based Electrodes: Fabrication and Electrochemical Features

A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr<sub>2</sub>NiO<sub>4+&delta;</sub>-Based Electrodes: Fabrication and Electrochemical Features

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About

A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr<sub>2</sub>NiO<sub>4+δ</sub>-Based Electrodes: Fabrication and Electrochemical Features