La0.6Sr0.4Co0.2Fe0.8O3−δ cathodes infiltrated with samarium-doped cerium oxide for solid oxide fuel cells

Nie, Lei; Liu, Mingfei; Zhang, Yujun; Liu, Meilin

doi:10.1016/j.jpowsour.2010.02.049

Cited by 187 publications

(110 citation statements)

References 18 publications

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“…A series of effi cient catalysts have successfully demonstrated significant enhancement in both electro-catalytic activity and stability of the LSCF cathode, representing a new direction of SOFC cathodes. [ 111,[458][459][460][461] Unfortunately, poisoning effects of volatile contaminants may drastically degrade the performance of the SOFC cathodes, representing a major stumbling block to the realization of a durable SOFC stack, especially Cr from typical Cr-containing interconnect materials under SOFC operating REVIEW wileyonlinelibrary.com conditions. [ 462 ] Therefore, more durable and robust catalyst coatings should also have excellent tolerance against contaminants.…”

Section: Surface Modifi Cation Of Conventional Cathodesmentioning

confidence: 99%

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Chen

Zhou

Ding

et al. 2015

Advanced Energy Materials

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254

155

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Solid oxide fuel cells (SOFCs) represent one of the cleanest and most efficient options for the direct conversion of a wide variety of fuels to electricity. For example, SOFCs powered by natural gas are ideally suited for distributed power generation. However, the commercialization of SOFC technologies hinges on breakthroughs in materials development to dramatically reduce the cost while enhancing performance and durability. One of the critical obstacles to achieving high‐performance SOFC systems is the cathodes for oxygen reduction reaction (ORR), which perform poorly at low temperatures and degrade over time under operating conditions. Here a comprehensive review of the latest advances in the development of SOFC cathodes is presented: complex oxides without alkaline earth metal elements (because these elements could be vulnerable to phase segregation and contaminant poisoning). Various strategies are discussed for enhancing ORR activity while minimizing the effect of contaminant on electrode durability. Furthermore, some of the critical challenges are briefly highlighted and the prospects for future‐generation SOFC cathodes are discussed. A good understanding of the latest advances and remaining challenges in searching for highly active SOFC cathodes with robust tolerance to contaminants may provide useful guidance for the rational design of new materials and structures for commercially viable SOFC technologies.

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Section: Surface Modifi Cation Of Conventional Cathodesmentioning

confidence: 99%

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Chen

Zhou

Ding

et al. 2015

Advanced Energy Materials

Self Cite

254

155

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“…Improved performance and stability has been reported by using thin catalytic coating of LSM [92], SSC [93] and SDC [94] on LSCF surface. For example, Matt et al [92] systematically studied the electrochemical behavior of LSM infiltrated LSCF cathode.…”

Section: Enhance Cathode Performance and Stability Through Surface Mementioning

confidence: 99%

Solid Oxide Fuel Cells

Zuo

Liu

2012

Sol-Gel Processing for Conventional and Alternative Energy

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Solid oxide fuel cells (SOFCs) have potential to be the most efficient and cost-effective system for direct conversion of a wide variety of fuels to electricity. The performance and durability of SOFCs depend strongly on the microstructure and morphology of cell components. As a unique synthesis and processing technique with easy control of composition, structure, morphology, and microstructure, sol-gel processes have been widely used for fabrication of key SOFC materials or critical components with desired properties or functionalities unattainable otherwise. In this chapter, we provide an overview on sol-gel processes applied for preparation of homogeneous and fine powders of electrolyte, electrode, and ceramic interconnect materials, for deposition of dense electrolyte membranes or porous electrode films, and for modification of electrode or metallic interconnect surface or interface to enhance catalytic activity, to improve tolerance to coking or contaminant poisoning, and to increase stability against oxidation, reduction, or other degradation mechanisms. While significant progress has been made in controlling and tailoring the composition, microstructure, morphology, and hence functionality of materials and components, many challenges still remain to make sol-gel processes cost-effective and versatile for many applications. The development of novel sol-gel processes as well as the exploration of the existing ones to new applications continues to be an intriguing research pursuit.

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“…For example, decorating La 1-x Sr x Co 1-y Fe y O 3-δ (LSCF) porous electrodes with certain nanoparticles such as Sm 1-x Sr x CoO 3-δ (SSC) and Ce 1-x Sm x O 2-δ (SDC) has been reported to reduce polarization resistances [26,27], whereas coating LSCF surfaces with La 1-x Sr x MnO 3-δ (LSM) can improve long-term stabilities [28]. Carbon deposition on nickel-based anodes can also be alleviated through modifications such as BaO, BZCYYb, or BZY, which are catalysts that can facilitate the gasification of deposited carbon atoms [3,9,29,30].…”

Section: Introductionmentioning

confidence: 99%

In Situ and Surface-Enhanced Raman Spectroscopy Study of Electrode Materials in Solid Oxide Fuel Cells

Blinn

Chen

et al. 2018

Electrochem. Energ. Rev.

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Solid oxide fuel cells (SOFCs) represent next-generation energy sources with high energy conversion efficiencies, low pollutant emissions, good flexibility with a wide variety of fuels, and excellent modularity suitable for distributed power generation. As an electrochemical energy conversion device, the SOFC's performance and reliability depend sensitively on the catalytic activity and stability of electrode materials. To date, however, the development of electrode materials and microstructures is still based largely on trial-and-error methods because of the inadequate understanding of electrode process mechanisms. Therefore, the identification of key descriptors/properties for electrode materials or functional heterogeneous interfaces, especially under in situ/operando conditions, may provide guidance for the design of optimal electrode materials and microstructures. Here, Raman spectroscopy is ideally suited for the probing and mapping of chemical species present on electrode surfaces under operating conditions. And to boost the sensitivity toward electrode surface species, the surfaceenhanced Raman spectroscopy (SERS) technique can be employed, in which thermally robust SERS probes (e.g., Ag@ SiO 2 core-shell nanoparticles) are designed to make in situ/operando analysis possible. This review summarizes recent progresses in the investigation of SOFC electrode materials through Raman spectroscopic techniques, including topics of early stage carbon deposition (coking), coking-resistant anode modification, sulfur poisoning, and cathode degradation. In addition, future perspectives for utilizing the in situ/operando SERS for investigations of other electrochemical surfaces and interfaces are also discussed.

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La0.6Sr0.4Co0.2Fe0.8O3−δ cathodes infiltrated with samarium-doped cerium oxide for solid oxide fuel cells

Cited by 187 publications

References 18 publications

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Solid Oxide Fuel Cells

In Situ and Surface-Enhanced Raman Spectroscopy Study of Electrode Materials in Solid Oxide Fuel Cells

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