Nanoscale architecture of (La0.6Sr1.4)0.95Mn0.9B0.1O4 (B Co, Ni, Cu) Ruddlesden–Popper oxides as efficient and durable catalysts for symmetrical solid oxide fuel cells

Wang, Junkai; Zhou, Jun; Yang, Jiaming; Zong, Zheng; Fu, Lei; Lian, Zhongjie; Zhang, Xingchang; Wang, Xuan; Chen, Chengxiang; Ma, Wanli; Wu, Kai

doi:10.1016/j.renene.2020.05.014

Cited by 27 publications

(19 citation statements)

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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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“…30 Mechanical incompatibility is due to the large thermal expansion coefficient (TEC) of cobalt oxides, much larger than those of commonly used electrolytes Ce 0.8 Gd 0.2 O 2−δ (CGO) at IT and yttria-stabilized zirconia at high temperatures, often due to spin transitions of cobalt ions. 31−34 Among the R−P series, many oxides with n = 1 have been studied as air-electrodes in SOFCs 2,8,11,12 and some of them display noticeable performances as air-electrodes of IT-SOFCs. 1,3,9−11 However, only a few articles reporting the properties of n = 2 and 3 members have been published.…”

Section: Introductionmentioning

confidence: 99%

“…In the search for cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFC), oxides of the Ruddlesden–Popper (R–P) family are attracting much attention. − The R–P series, , with the general formula A n +1 M n O 3 n +1 ((AMO 3 ) n AO) (A = rare-earth and/or alkaline-earth elements and M = transition metal with n = 1, 2, etc. ), comprise a vast family of oxides.…”

Section: Introductionmentioning

confidence: 99%

Superior Performance as Cathode Material for Intermediate-Temperature Solid Oxide Fuel Cells of the Ruddlesden–Popper n = 2 Member Eu₂SrCo_0.50Fe_1.50O_7−δ with Low Cobalt Content

et al. 2021

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The effects of the contents of iron and cobalt on the crystal structure, oxygen content, thermal expansion coefficient, and electrical–electrochemical properties of materials Eu2SrCo x Fe2–x O7−δ (x = 0.50 and 1.00) are reported. These oxides are well-ordered new members of the Ruddlesden–Popper series (Eu,Sr) n+1(Co,Fe) n O3n+1 system with n = 2 as determined by selected area electron diffraction and high-resolution transmission electron microscopy and X-ray diffraction studies. The two materials are semiconductors of p-type, with much higher total conductivity under working conditions for the low cobalt compound, Eu2SrCo0.50Fe1.50O7−δ. Composite cathodes prepared with this oxide present much lower area-specific resistance values (0.08 Ω·cm2 at 973 K in air) than composites containing Eu2SrCo1.00Fe1.00O7−δ (1.15 Ω·cm2). This significant difference is related to the much higher total conductivity and a sufficiently high content of oxygen vacancies in the Fe-rich phase. The excellent electrochemical performance of Eu2SrCo0.50Fe1.50O7−δ with low cobalt content, which shows one of the lowest area-specific resistance reported so far for a Ruddlesden–Popper oxide, makes it a good candidate for application as a cathode material for solid oxide fuel cells at intermediate temperatures in real devices.

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“…Among the most commonly used materials for the electrolyte, fluorite-structured reference electrode (RE)-doped ceria is considered the best candidate to operate SOC at the targeted operative temperatures [14][15][16]. Various oxides with perovskite [17][18][19][20], double perovskite [21][22][23] and Ruddlesden-Popper (RP) [24][25][26] structures showing suitable mixed ionic-electronic conductivity and/or electrocatalytic activity have been proposed for SOFC and SOEC electrode layers.…”

Section: Introductionmentioning

confidence: 99%

Infiltrated Ba0.5Sr0.5Co0.8Fe0.2O3-δ-Based Electrodes as Anodes in Solid Oxide Electrolysis Cells

d’Intignano

Cademartori²,

Clematis³

et al. 2020

Energies

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In the last decades, several works have been carried out on solid oxide fuel cell (SOFC) and solid oxide electrolysis cell (SOEC) technologies, as they are powerful and efficient devices for energy conversion and electrochemical storage. By increasing use of renewable sources, a discontinuous amount of electricity is indeed released, and reliable storage systems represent the key feature in such a future energy scenario. In this context, systems based on reversible solid oxide cells (rSOCs) are gaining increasing attention. An rSOC is an electrochemical device that can operate sequentially between discharging (SOFC mode) and charging (SOEC mode); then, it is essential the electrodes are able to guarantee high catalytic activity, both in oxidation and reduction conditions. Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) has been widely recognized as one of the most promising electrode catalysts for the oxygen reduction reaction (ORR) in SOFC technology because of its astonishing content of oxygen vacancies, even at room temperature. The purpose of this study is the development of BSCF to be used as anode material in electrolysis mode, maintaining enhanced energy and power density. Impregnation with a La0.8Sr0.2MnO3 (LSM) discrete nanolayer is applied to pursue structural stability, resulting in a long lifetime reliability. Impedance spectroscopy measurements under anodic overpotential conditions are run to test BSCF and LSM-BSCF activity as the electrode in oxidation mode. The observed results suggest that BSCF is a very promising candidate as an oxygen electrode in rSOC systems.

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Nanoscale architecture of (La0.6Sr1.4)0.95Mn0.9B0.1O4 (B Co, Ni, Cu) Ruddlesden–Popper oxides as efficient and durable catalysts for symmetrical solid oxide fuel cells

Cited by 27 publications

References 50 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

Superior Performance as Cathode Material for Intermediate-Temperature Solid Oxide Fuel Cells of the Ruddlesden–Popper n = 2 Member Eu₂SrCo_0.50Fe_1.50O_7−δ with Low Cobalt Content

Infiltrated Ba0.5Sr0.5Co0.8Fe0.2O3-δ-Based Electrodes as Anodes in Solid Oxide Electrolysis Cells

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Nanoscale architecture of (La0.6Sr1.4)0.95Mn0.9B0.1O4 (B Co, Ni, Cu) Ruddlesden–Popper oxides as efficient and durable catalysts for symmetrical solid oxide fuel cells

Cited by 27 publications

References 50 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

Superior Performance as Cathode Material for Intermediate-Temperature Solid Oxide Fuel Cells of the Ruddlesden–Popper n = 2 Member Eu2SrCo0.50Fe1.50O7−δ with Low Cobalt Content

Infiltrated Ba0.5Sr0.5Co0.8Fe0.2O3-δ-Based Electrodes as Anodes in Solid Oxide Electrolysis Cells

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Product

Resources

About

Superior Performance as Cathode Material for Intermediate-Temperature Solid Oxide Fuel Cells of the Ruddlesden–Popper n = 2 Member Eu₂SrCo_0.50Fe_1.50O_7−δ with Low Cobalt Content