Performance of PrBaCo2O5+δ impregnated La0.6Sr0.4Co0.2Fe0.8O3−δ composites as potential cathode materials for solid oxide fuel cells

Liu, Yihui; Pan, Zhuofei; Zhao, Xiaofei; Zhong, Shengwen; Chen, Xiyong; Wang, Chao

doi:10.1016/j.jallcom.2021.161155

Cited by 12 publications

(8 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This can be attributed to the lower thermal activation energy and reduced impedance of lattice oxygen transport within the oxygen vacancies of SCT. 11 k chem intuitively reflects the O 2− evolution rate on the oxygen-electrode surface, 20 whereas D chem reflects the O 2− transport rate within the oxygen-electrode. Both factors govern the electrocatalytic activity of the oxygen-electrode.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Oxygen Evolution Rate and Anti-interfacial Delamination Property of the SrCo_0.9Ta_0.1O_3-δ@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ Oxygen-Electrode for Solid Oxide Electrolysis Cells

Wu,

Zheng,

Yang

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Interfacial delamination between the oxygen-electrode and electrolyte is a significant factor impacting the reliability of solid oxide electrolysis cells (SOECs) when operating at high voltages. The most effective method to mitigate this delamination is to decrease the interfacial oxygen partial pressure, which can be accomplished by amplifying the oxygen exsolution rate and the O 2− transport rate of the oxygen-electrode. In this study, a SrCo 0.9 Ta 0.1 O 3-δ (SCT) film with an outstanding oxygen surface exchange coefficient and an outstanding O 2− conductivity was introduced onto the La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) surface by infiltration. This composite oxygen-electrode exhibited a notably high electrochemical catalytic activity primarily due to the significantly improved O 2− transport and oxygen surface exchange rate. Single cells with a 15-LSCF oxygen-electrode achieved a peak power density of 1.33 W cm −2 at 700 °C and a current density of 1.25 A cm −2 at 1.3 V (60% H 2 O-H 2 ) at 750 °C. Additionally, an electrolysis cell with a 15 wt % SCT-infiltrated LSCF oxygen-electrode demonstrated stable operation even at high current densities for over 330 h with no noticeable delamination. The remarkable durability of the 15-LSCF oxygen-electrode can be attributed to the boosted oxygen exsolution reaction (OER) activity and the suppression of Sr segregation due to SCT infiltration. The impressive OER activity and resistance to interfacial delamination make the 15-LSCF a promising candidate for a composite oxygen-electrode in SOECs.

show abstract

Section: Resultsmentioning

confidence: 99%

“…k chem intuitively reflects the O 2– evolution rate on the oxygen-electrode surface, whereas D chem reflects the O 2– transport rate within the oxygen-electrode. Both factors govern the electrocatalytic activity of the oxygen-electrode.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Oxygen Evolution Rate and Anti-interfacial Delamination Property of the SrCo_0.9Ta_0.1O_3-δ@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ Oxygen-Electrode for Solid Oxide Electrolysis Cells

Wu,

Zheng,

Yang

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Impregnation technique has been widely used to ensure the good contact, mechanical stability, and thermal expansion matching between electrode and electrolyte. 123,124 Proper amount of PrBaCo 2 O 5+δ (PBC) impregnated into La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ (LSCF) skeleton can significantly improve the oxygen surface exchange performance, electrical conductivity, and thermal expansion compatibility, thereby accelerating the oxygen exchange rate of the electrode. 123 Hsiao et al conducted 50 wt% PrBaCo 2 O 5+δ (PBC) and 50 wt% Sm 0.5 Sr 0.5 CoO 3-δ (SSC) infiltrated into GDC electrolyte backbones to form composite cathodes, demonstrating low ASR values of 1.36 × 10 -2 and 2.27 × 10 -2 Ω cm 2 at 650 °C in air respectively.…”

Section: Performance Optimization Of Double Perovskite Cathodesmentioning

confidence: 99%

Review—Double-Perovskite Electrode Design Strategies and Research Progress for SOFCs

Jiang¹,

Wei²,

Huang³

2022

J. Electrochem. Soc.

View full text Add to dashboard Cite

Since the double perovskite oxides Sr2Mg1-xMnxMoO6- were reported as anode materials for solid oxide fuel cells (SOFCs) by Professor Goodenough in 2006, they have attracted increasing interest in the past decades. This article reviews the latest progress of double perovskite electrode materials in crystal structure, ion-electron conducting model, catalytic activity, degradation mechanism and optimizing strategies. Their advantages, disadvantages, and electrochemical performances as SOFC electrodes have been discussed through extensive analysis of the literatures. Particular emphasis has been directed towards basic principles and various affecting factors regarding the performance and stability for the double perovskite oxides and their composites. The solutions to overcome the drawbacks of double perovskite electrodes, including element substitution, defect engineering and so on, have also been demonstrated.

show abstract

“…The composite cathode preparation aims to improve the oxygen adsorption and conductivity of cathode by doping materials with ionic conductivity. Impregnation is one of the most commonly used means 18–20 …”

Section: Introductionmentioning

confidence: 99%

“…Impregnation is one of the most commonly used means. [18][19][20] LSC is a promising SOFC cathode material, and the composition of LSC with some ionic materials, such as Ce 0.85 Sm 0.075 Nd 0.075 O 2-δ (SNDC) or Sm 2 O 3 -doped CeO 2 (SDC), to form a composite cathode may improve the performance. 21,22 The composite cathode always has a low TEC value, and the extended three-phase boundary (TPB) can raise the activity of oxygen reduction reaction (ORR) and reduce the R p .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical performance of La_0.6Sr_0.4CoO_3–_δ–Ce_0.9Gd_0.1O_1.95 composite cathode for IT‐SOFCs

Fan

Liu

et al. 2023

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

In this work, the performance of solid oxide fuel cells is improved by physically mixing Ce0.9Gd0.1O1.95 (GDC) in La0.6Sr0.4CoO3–δ (LSC) cathode. The grain size and chemical compatibility of the powder were analyzed using X‐ray diffraction. Scanning electron microscopy was used to observe the microstructure of powder and cells. The thermal expansion coefficients (TECs) of LSC–GDC powder with different mass ratios were tested (LSC:GDC = 10:0, 9:1, 8:2, 7:3, 6:4, and 5:5) and LSC–GDC (5:5) showed the minimal TEC (1.34 × 10−5 K−1 at 650°C). The cathodes with different mass ratios are prepared by screen printing. The symmetrical cell with LSC–GDC (5:5) had the smallest cathode polarization resistance (0.0801 Ω cm2 at 650°C) and the lowest activation energy (1.12 eV). The button cell with LSC–GDC (5:5) exhibited the maximum power density (513 mW cm−2 at 650°C) and could be discharged for 550 h without significant degradation. The LSC–GDC (5:5) cathode was applied to a flat‐tube solid oxide fuel cell and achieved a high power density of 552 mW cm−2 at 0.8 V. The results show that the LSC–GDC (5:5) has a bright future in commercialization.

show abstract

Performance of PrBaCo2O5+δ impregnated La0.6Sr0.4Co0.2Fe0.8O3−δ composites as potential cathode materials for solid oxide fuel cells

Cited by 12 publications

References 34 publications

Enhanced Oxygen Evolution Rate and Anti-interfacial Delamination Property of the SrCo_0.9Ta_0.1O_3-δ@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ Oxygen-Electrode for Solid Oxide Electrolysis Cells

Enhanced Oxygen Evolution Rate and Anti-interfacial Delamination Property of the SrCo_0.9Ta_0.1O_3-δ@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ Oxygen-Electrode for Solid Oxide Electrolysis Cells

Review—Double-Perovskite Electrode Design Strategies and Research Progress for SOFCs

Electrochemical performance of La_0.6Sr_0.4CoO_3–_δ–Ce_0.9Gd_0.1O_1.95 composite cathode for IT‐SOFCs

Contact Info

Product

Resources

About

Performance of PrBaCo2O5+δ impregnated La0.6Sr0.4Co0.2Fe0.8O3−δ composites as potential cathode materials for solid oxide fuel cells

Cited by 12 publications

References 34 publications

Enhanced Oxygen Evolution Rate and Anti-interfacial Delamination Property of the SrCo0.9Ta0.1O3-δ@La0.6Sr0.4Co0.2Fe0.8O3-δ Oxygen-Electrode for Solid Oxide Electrolysis Cells

Enhanced Oxygen Evolution Rate and Anti-interfacial Delamination Property of the SrCo0.9Ta0.1O3-δ@La0.6Sr0.4Co0.2Fe0.8O3-δ Oxygen-Electrode for Solid Oxide Electrolysis Cells

Review—Double-Perovskite Electrode Design Strategies and Research Progress for SOFCs

Electrochemical performance of La0.6Sr0.4CoO3–δ–Ce0.9Gd0.1O1.95 composite cathode for IT‐SOFCs

Contact Info

Product

Resources

About

Enhanced Oxygen Evolution Rate and Anti-interfacial Delamination Property of the SrCo_0.9Ta_0.1O_3-δ@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ Oxygen-Electrode for Solid Oxide Electrolysis Cells

Enhanced Oxygen Evolution Rate and Anti-interfacial Delamination Property of the SrCo_0.9Ta_0.1O_3-δ@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ Oxygen-Electrode for Solid Oxide Electrolysis Cells

Electrochemical performance of La_0.6Sr_0.4CoO_3–_δ–Ce_0.9Gd_0.1O_1.95 composite cathode for IT‐SOFCs