Preparation and characterization of Nd2−xSrxCoO4+δ cathodes for intermediate-temperature solid oxide fuel cell

Cao, Yue; Gu, Hal-Bon; Chen, Han; Zheng, Yifeng; Zhou, Ming; Guo, Lucun

doi:10.1016/j.ijhydene.2010.03.046

Cited by 30 publications

(21 citation statements)

References 28 publications

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“…High sintering temperatures result in significantly increased grain sizes of cathode particles as well as decreased porosity and triple-phase boundary for ORR, leading to increased ASR and decreased performance. Similar phenomena have been reported by other researchers [15,16,20]. Fig.…”

Section: Electrochemical Impedance Spectroscopysupporting

confidence: 90%

“…6. The linear relationship between ln(sT ) and 1000 T À1 indicates that the conductivity behavior of the LBCO-5BBP cathode followed the small polaron conductivity mechanism and the following Arrhenius formula [16].…”

Section: Electrical Conductivitymentioning

confidence: 92%

“…The sintering temperatures are usually as high as 1000e1200 C in air whether for ABO 3 perovskite-type oxides, A 2 BO 4 -type oxides, or double-layered perovskite structural LnBaCo 2 O 5þd [10,11,14e19]. High sintering temperatures always result in significantly increased cathode particle grain sizes as well as decreased porosity and triple-phase boundary for ORR, leading to decreased performances [15,16]. Therefore, the sintering temperatures of cathode materials need to be lowered without sacrificing their performance.…”

Section: Introductionmentioning

confidence: 99%

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Effect of B2O3–Bi2O3–PbO frit on the performance of LaBaCo2O5+δ cathode for intermediate-temperature solid oxide fuel cells

et al. 2012

International Journal of Hydrogen Energy

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Section: Electrochemical Impedance Spectroscopysupporting

confidence: 90%

Section: Electrical Conductivitymentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Effect of B2O3–Bi2O3–PbO frit on the performance of LaBaCo2O5+δ cathode for intermediate-temperature solid oxide fuel cells

et al. 2012

International Journal of Hydrogen Energy

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“…This is due to the loss of lattice oxygen and the formation of oxygen vacancy, a process that is enhanced as the Sr-doping content increases. The similar results have been found in the other Sr doped Ln 2x Sr x MO 4 (Ln = Pr, Sm, Nd; M = Fe, Co) materials [10,20]. As we know, the thermal expansion depends in general on the electrostatic attraction forces within the lattices, which are functions of the concentration of positive and negative charges and their distances within the lattice.…”

Section: Thermal Expansion Coefficients (Tecs)supporting

confidence: 85%

“…No decomposition and/ or chemical reaction has been observed at 1000 °C for 48 h heat treatment. The similar conclusion was obtained in the Nd 2x Sr x CoO 4 , which remained un-reacted with SDC even at 1100 °C for 48 h [10]. Although the Sr doping Ln 2 MO 4 materials gave promising results of their chemical compatibility with electrolytes, the doping effect of other elements has been evaluated.…”

Section: High Temperature Chemical Reactivity and Stabilitysupporting

confidence: 71%

Ln2MO4 cathode materials for solid oxide fuel cells

Zhao

Sun

2011

Sci. China Chem.

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One of the major challenges to develop "intermediate temperature" solid oxide fuel cells is finding a novel cathode material, which can meet the following requirements: (1) high electronic conductivity; (2) chemical compatibility with the electrolyte; (3) a matched thermal expansion coefficient (TEC); (4) stability in a wide range of oxygen partial pressure; and (5) high catalytic activity for the oxygen reduction reaction (ORR). In this short review, a survey of these requirements for K 2 NiF 4 -type material with the formula Ln 2 MO 4 , Ln = La, Pr, Nd, Sm; M = Ni, Cu, Fe, Co, Mn, is presented. The composition-dependent TEC, electrical conductivity and oxygen transport property are considered. The Ln 2 MO 4 materials exhibit improved chemical stability and compatibility with most of the traditional electrolytes. The complete fuel cells integrated with Ln 2 MO 4 materials as cathodes show promising results. Furthermore, these materials are considered as cathodes of protonic ceramic fuel cell (PCFC), and/or anodes of high temperature steam electrolysis (HTSE). First results show excellent performances. The versatility of these Ln 2 MO 4 materials is explained on the basis of structural features and the ability to accommodate oxygen nonstoichiometry.intermediate temperature solid oxide fuel cells (ITSOFCs), cathode, K 2 NiF 4 -type structure, oxygen non-stoichiometry

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How Cation Substitutions Affect the Oxygen Reduction Reaction on La_2−xSr_xNi_1−yFe_yO₄

2022

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The atomic proximity of two disparate structural motifs in interleaved structures such as that adopted by La2NiO4, which alternates rock salt and perovskite motifs, offers potential synergistic effects and increased tunability for electrocatalyst behavior. Structural and voltammetric analysis of the intersecting composition series LaSrNi1−yFeyO4+δ and La2−xSrxNi0.7Fe0.3O4+δ show that tuning different cation sites uniquely affects structure and behavior. Correlations between X‐ray diffraction and Raman spectroscopy results reveal that structural changes in the a‐b plane are uniformly matched by the c‐axis following La−Sr exchange, while Ni−Fe exchange distorts the structure by expanding the crystal c‐axis and generating oxygen defects with a distinct signature in Raman spectra. Correlations between rotating ring‐disk electrode voltammetry results and structural parameters show that only Fe substitution has a direct effect on the electrocatalytic oxygen reduction reaction. We link systematic changes observed for onset of electrocatalytic oxygen reduction reaction, Tafel slope, and selectivity to distortions in the B‐site environments. This analysis demonstrates that correlational analysis linking electrochemical behavior parameters to multiple structural characterization techniques is an effective means to probe the effect of individual compositional substitution on electrocatalytic behavior.

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Preparation and characterization of Nd2−xSrxCoO4+δ cathodes for intermediate-temperature solid oxide fuel cell

Cited by 30 publications

References 28 publications

Effect of B2O3–Bi2O3–PbO frit on the performance of LaBaCo2O5+δ cathode for intermediate-temperature solid oxide fuel cells

Effect of B2O3–Bi2O3–PbO frit on the performance of LaBaCo2O5+δ cathode for intermediate-temperature solid oxide fuel cells

Ln2MO4 cathode materials for solid oxide fuel cells

How Cation Substitutions Affect the Oxygen Reduction Reaction on La_2−xSr_xNi_1−yFe_yO₄

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Preparation and characterization of Nd2−xSrxCoO4+δ cathodes for intermediate-temperature solid oxide fuel cell

Cited by 30 publications

References 28 publications

Effect of B2O3–Bi2O3–PbO frit on the performance of LaBaCo2O5+δ cathode for intermediate-temperature solid oxide fuel cells

Effect of B2O3–Bi2O3–PbO frit on the performance of LaBaCo2O5+δ cathode for intermediate-temperature solid oxide fuel cells

Ln2MO4 cathode materials for solid oxide fuel cells

How Cation Substitutions Affect the Oxygen Reduction Reaction on La2−xSrxNi1−yFeyO4

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How Cation Substitutions Affect the Oxygen Reduction Reaction on La_2−xSr_xNi_1−yFe_yO₄