Synthesis and characterization of aluminum-doped perovskites as cathode materials for intermediate temperature solid oxide fuel cells

Qiao, Jinshuo; Yan, Yi‐Ming; Peng, Jun; Wang, Zhenhua; Jiang, Taizhi; Sun, Kening

doi:10.1016/j.ijhydene.2012.04.113

Cited by 20 publications

(20 citation statements)

References 33 publications

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“…Most of the mainstream research in SOFCs is focused on the O-SOFCs in which oxygen ion is the charge carrier in the electrolyte. [53][54][55][56][57][58][59][60][61][62][63][64] Numerous research works have been done in improving the performance, stability, and durability of O-SOFCs with remarkable progress being made, particularly in the improvement of the electrode activities of cathode materials for O-SOFC. [65][66][67][68][69][70][71] Notable research studies have also been conducted to develop and improve upon the commonly used benchmark for electrode material development (ie, BSCF) in O-SOFCs.…”

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confidence: 99%

Materials development and prospective for protonic ceramic fuel cells

Bello

Zhai

et al. 2021

Intl J of Energy Research

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Protonic ceramic fuel cells (PCFCs) are considered a potential and more efficient upgrade to conventional solid oxide fuel cells (SOFCs). This is predominantly due to their capacity to operate efficiently at low and intermediate temperatures and their quality of nonfuel dilution at the anode during operation. This review presents a detailed exposition of the material development strategies for the major components of PCFCs (i.e., electrolyte, cathode, and anode) and how they differ from the traditional SOFCs. Credible science backed recommendations for the synthesis and fabrication of PCFCs materials are discussed. In the end, the opportunities, challenges, and future directions for P-SOFCs are buttressed.

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confidence: 99%

Materials development and prospective for protonic ceramic fuel cells

Bello

Zhai

et al. 2021

Intl J of Energy Research

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“…The lattice constant of BSFCu (3.9406 (6) Å) is lower than the BSFAl (3.9577 (3) Å) even though Cu 2+ (0.73 Å) has a larger ionic radius than Al 3+ (0.535 Å) in 6-fold coordination. 45 This might be due to the presence of higher fractions of Fe 3+ (0.645 Å, HS) than Fe 4+ (0.585 Å) due to the Al doping at the Fe site, as reported by Martynczuk et al and Lou et al 22,23 Another possible influence on the lattice parameter might be the oxygen vacancy concentration in the bulk, that is expected to be much higher in the case of BSFCu as compared to BSFAl due to selfcompensation. 46 average lattice thermal expansion coefficient (TCE, α) was calculated from the linear expansion region for both BSFAl and BSFCu using the expression:…”

Section: ■ Results and Discussionmentioning

confidence: 86%

“…22 resistance (ASR) values, 0.26 Ω cm 2 at 800 °C and ∼1.9 Ω cm 2 at 700 °C. 23 Sm 0.5 Sr 0.5 Fe 0.8 Cu 0.2 O 3-δ cathode on Sm 0.2 Ce 0.8 O 1.9 electrolyte showed a very promising ASR of 0.085 Ω cm 2 at 700 °C. 18 24,25 As recorded ASR values for ORR activity are not low enough for getting high performance during full cell operations on BSCZGY electrolyte, developing highly catalytic active and chemically stable cathode material is underway.…”

Section: ■ Introductionmentioning

confidence: 97%

Understanding of Oxygen Reduction Reaction on Perovskite-Type Ba_0.5Sr_0.5Fe_0.91Al_0.09O_3-δ and Ba_0.5Sr_0.5Fe_0.8Cu_0.2O_3-δ Using AC Impedance Spectroscopy Genetic Programming

Singh

Gelman

et al. 2018

J. Phys. Chem. C

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Fundamental understanding of the oxygen reduction reaction (ORR) mechanism in electrochemical cells (e.g., solid oxide fuel cells (SOFCs)) is rather challenging because of several processes, which occur with similar time constants. Also, it is very difficult to elucidate ORR reaction steps using a conventional equivalent circuit modeling in ac impedance spectroscopy. There is no unique model to fully explain the ORR mechanism, especially in high temperature SOFCs. In this study, attempt has been made using impedance spectroscopy genetic programming (ISGP) technique to describe SOFC cathode ORR processes. Using ISGP, we analyzed the electrochemical performance of Ba 0.5 Sr 0.5 Fe 0.91 Al 0.09 O 3-δ (BSFAl) and Ba 0.5 Sr 0.5 Fe 0.8 Cu 0.2 O 3-δ (BSFCu) cathodes with oxide ion conducting La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3-δ (LSGM) and proton conducting Ba 0.5 Sr 0.5 Ce 0.6 Zr 0.2 Gd 0.1 Y 0.1 O 3-δ (BSCZGY) electrolytes. The ORR mechanism is explained by finding the distribution function of relaxation time (DFRT) with the help of ISGP. By monitoring the changes in the DFRT models at different temperatures and using both oxide ion and proton conducting electrolytes, we are able to deconvolute the ORR to its several polarization subprocesses. Using the present approach, it is possible to gain additional information, which may be convoluted and therefore undetected in conventional impedance analysis. The analysis procedure results in a direct and unambiguous DFRT model, with a distinct physical meaning. Therefore, making it especially beneficial in comparative studies, as demonstrated in this work, where it was found that BSFCu-LSGM cathode showed better charge-transfer properties than BSFAl-LSGM cathode, due to higher conductivity of BSFCu phase. In both BSCZGY-BSFCu and BSCZGY-BSFAl cathodes, the rate-limiting step was found to be the charge-transfer process, owing to low electrical (ionic) conductivity of BSCZGY.

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“…The R2 values are always larger than the R1 ones (as shown in Fig. 12a at 600 °C), suggesting that the oxygen desorption or adsorption process is the rate-limiting step for the oxygen reduction reaction (ORR) 24,25,26 . Indeed, NdBaMn2O6 oxygen electrodes shows similar performance as La3Ni2O7+δ and La4Ni3O10-δ electrodes 27 .…”

Section: Electrochemical Propertiesmentioning

confidence: 93%

A-site order–disorder in the NdBaMn₂O_5+δ SOFC electrode material monitored in situ by neutron diffraction under hydrogen flow

et al. 2017

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Synthesis and characterization of aluminum-doped perovskites as cathode materials for intermediate temperature solid oxide fuel cells

Cited by 20 publications

References 33 publications

Materials development and prospective for protonic ceramic fuel cells

Materials development and prospective for protonic ceramic fuel cells

Understanding of Oxygen Reduction Reaction on Perovskite-Type Ba_0.5Sr_0.5Fe_0.91Al_0.09O_3-δ and Ba_0.5Sr_0.5Fe_0.8Cu_0.2O_3-δ Using AC Impedance Spectroscopy Genetic Programming

A-site order–disorder in the NdBaMn₂O_5+δ SOFC electrode material monitored in situ by neutron diffraction under hydrogen flow

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Synthesis and characterization of aluminum-doped perovskites as cathode materials for intermediate temperature solid oxide fuel cells

Cited by 20 publications

References 33 publications

Materials development and prospective for protonic ceramic fuel cells

Materials development and prospective for protonic ceramic fuel cells

Understanding of Oxygen Reduction Reaction on Perovskite-Type Ba0.5Sr0.5Fe0.91Al0.09O3-δ and Ba0.5Sr0.5Fe0.8Cu0.2O3-δ Using AC Impedance Spectroscopy Genetic Programming

A-site order–disorder in the NdBaMn2O5+δ SOFC electrode material monitored in situ by neutron diffraction under hydrogen flow

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Understanding of Oxygen Reduction Reaction on Perovskite-Type Ba_0.5Sr_0.5Fe_0.91Al_0.09O_3-δ and Ba_0.5Sr_0.5Fe_0.8Cu_0.2O_3-δ Using AC Impedance Spectroscopy Genetic Programming

A-site order–disorder in the NdBaMn₂O_5+δ SOFC electrode material monitored in situ by neutron diffraction under hydrogen flow