Metal exsolution from perovskite-based anodes in solid oxide fuel cells

Zhu, Shasha; Fan, Junde; Li, Zongbao; Wu, Jun; Xiao, Mengqin; Du, Pengxuan; Wang, Xin; Jia, Lichao

doi:10.1039/d3cc05688k

Cited by 4 publications

(2 citation statements)

References 126 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the number of nanocatalysts generated is far from sufficient because a large amount of the metal ions still remain in the parent lattice because the low cation diffusion rate and excessive reduction may result in the collapse of the electrode structure . Moreover, because of the requirement of reducibility in exsolution, the method is limited to a small range of metal oxides that can be applied . Most critically, it is difficult to apply on air electrodes as in situ exsolution generally occurs under reducing conditions …”

Section: Introductionmentioning

confidence: 99%

Development of Nanostructured Lanthanum Strontium Cobalt Ferrite/Gadolinian-Doped Ceria Composite Electrodes of Solid Oxide Cells Formed by In Situ Polarization

Sun,

He,

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

In the development of nanoscale oxygen electrodes of high-temperature solid oxide cells (SOCs), the interface formed between the nanoelectrode particles and the electrolyte or electrolyte scaffolds is the most critical. In this work, a new synthesis technique for the fabrication of nanostructured electrodes via in situ electrochemical polarization treatment is reported. The lanthanum strontium cobalt ferrite (LSCF) precursor solution is infiltrated into a gadolinia-doped ceria (GDC) scaffold presintered on a yttria-stabilized zirconia (YSZ) electrolyte, followed by in situ polarization current treatment at SOC operation temperatures. Electrode ohmic and polarization resistances decrease with an increase in the polarization current treatment. Detailed microstructure analysis indicates the formation of a convex-shaped interface between the LSCF nanoparticles (NPs) and the GDC scaffold, very different from the flat contact between LSCF and GDC observed after heating at 800 °C with no polarization current treatment. The embedded LSCF NPs on the GDC scaffold contribute to the superior stability under both fuel cell and electrolysis operation conditions at 750 °C and a high peak power density of 1.58 W cm −2 at 750 °C. This work highlights a novel and facile route to in situ construct a stable and high-performing nanostructured electrode for SOCs.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of Nanostructured Lanthanum Strontium Cobalt Ferrite/Gadolinian-Doped Ceria Composite Electrodes of Solid Oxide Cells Formed by In Situ Polarization

Sun,

He,

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Since SOFC anodes are operated in a strongly reducing atmosphere at high temperatures, exsolution occurs in operando [21]. A-site deficiency and a high oxygen vacancy concentration are driving forces influencing the exsolution at B-sites [22,23].…”

Section: Introductionmentioning

confidence: 99%

Influence of the La0.2Sr0.7Ti0.95Ni0.05O3 (LSTN) Synthesis Method on SOFC Anode Performance

Dahan,

Fadeev,

Hayun

et al. 2024

Catalysts

View full text Add to dashboard Cite

Solid oxide fuel cells are characterized by a high efficiency for converting chemical energy into electricity and fuel flexibility. This research work focuses on developing durable and efficient anodes for solid oxide fuel cells (SOFCs) based on exsolving nickel from the perovskite structure. A-site-deficient La- and Ni-doped strontium titanates (La0.2Sr0.7Ti0.95Ni0.05O3−δ, LSTN) were synthesized using four different techniques and mixed with Ce0.8Gd0.2O2−δ (GDC) to form the SOFC anode. The synthesis routes of interest for comparison included solid-state, sol-gel, hydrothermal, and co-precipitation methods. LSTN powders were characterized via XRD, SEM, TPR, BET and XPS. In situ XRD during reduction was measured and the reduced powders were analyzed using TEM. The impact of synthesis route on SOFC performance was investigated. All samples were highly durable when kept at 0.5 V for 48 h at 800 °C with H2 fuel. Interestingly, the best performance was observed for the cell with the LSTN anode prepared via co-precipitation, while the conventional solid-state synthesis method only achieved the second-best results.

show abstract

Ba-containing ferrites, Pr1–xBaxFeO3–δ, as symmetrical electrodes and their functional properties in both oxidizing and reducing atmospheres

Gordeeva,

Tarutin,

Vdovin

et al. 2024

Ceramics International

View full text Add to dashboard Cite

Metal exsolution from perovskite-based anodes in solid oxide fuel cells

Abstract: Solid oxide fuel cells (SOFCs) are highly efficient and environmentally friendly devices for converting fuel into electrical energy. In this regard, metal nanoparticles (NPs) loaded onto the anode oxide play...

Cited by 4 publications

References 126 publications

Development of Nanostructured Lanthanum Strontium Cobalt Ferrite/Gadolinian-Doped Ceria Composite Electrodes of Solid Oxide Cells Formed by In Situ Polarization

Development of Nanostructured Lanthanum Strontium Cobalt Ferrite/Gadolinian-Doped Ceria Composite Electrodes of Solid Oxide Cells Formed by In Situ Polarization

Influence of the La0.2Sr0.7Ti0.95Ni0.05O3 (LSTN) Synthesis Method on SOFC Anode Performance

Ba-containing ferrites, Pr1–xBaxFeO3–δ, as symmetrical electrodes and their functional properties in both oxidizing and reducing atmospheres

Contact Info

Product

Resources

About