Effects of chromium poisoning on the long-term oxygen exchange kinetics of the solid oxide fuel cell cathode materials La0.6Sr0.4CoO3 and Nd2NiO4

Yang, Min; Bucher, Edith; Sitte, Werner

doi:10.1016/j.jpowsour.2010.10.064

Cited by 61 publications

(58 citation statements)

References 41 publications

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“…[ 308 ] In another study, Yang et al compared the poisoning effects of chromium on the long-term oxygen exchange kinetics of La 0.6 Sr 0.4 CoO 3 and Nd 2 NiO 4 . [ 311 ] When an intended 10 nm thick Cr-layer was deposited onto the surface of La 0.6 Sr 0.4 CoO 3 electrode, the k chem of La 0.6 Sr 0.4 CoO 3 decreased to 50% of the initial value, likely caused by a serious surface Sr-enrichment. In contrast, the effect of a 10 nm thick Cr-layer on the k chem of Nd 2 NiO 4 was negligible.…”

Section: Ruddlesden-popper-type Metal Oxidesmentioning

confidence: 99%

“…The author attributed this high tolerance of Nd 2 NiO 4 electrode towards Cr poisoning due to the Sr-free nature of Nd 2 NiO 4 . [ 311 ] It should be mentioned that a performance degradation of the electrode from Cr contamination was observed in a following study that concerned about the impacts of Cr and Si contamination on an A-site defi cient Nd 1.95 NiO 4 electrode. [ 312 ] However, due to the existence of contamination effect from Si (from raw materials) on the Nd 1.95 NiO 4 electrode, more studies should be done to distinguish this poisoning effect caused by Cr.…”

Section: Ruddlesden-popper-type Metal Oxidesmentioning

confidence: 99%

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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

256

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: Ruddlesden-popper-type Metal Oxidesmentioning

confidence: 99%

Section: Ruddlesden-popper-type Metal Oxidesmentioning

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

256

155

View full text Add to dashboard Cite

show abstract

“…[11] However, the use of this material is not devoid of drawbacks; in particular, because of the high Cr content, volatile Cr-species can poison the catalysts, and the relatively low electrical conductivity of the forming oxides build up ohmic resistance at each contact. [12] To minimize these disadvantages various protective coatings, acting as barriers for oxidation and/or Cr diffusion, have been tested. [8,[13][14][15] However, Cr poisoning still remains a serious obstacle because of limited physico-chemical insights into the behaviour of the interconnects as a part of the complex multi-material system under working conditions.…”

Section: Introductionmentioning

confidence: 99%

In Situ X‐Ray Spectromicroscopy Investigation of the Material Stability of SOFC Metal Interconnects in Operating Electrochemical Cells

et al. 2011

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The present in situ study of electrochemically induced processes occurring in Cr/Ni bilayers in contact with a YSZ electrolyte aims at a molecular-level understanding of the fundamental aspects related to the durability of metallic interconnects in solid oxide fuel cells (SOFCs). The results demonstrate the potential of scanning photoelectron microspectroscopy and imaging to follow in situ the evolution of the chemical states and lateral distributions of the constituent elements (Ni, Cr, Zr, and Y) as a function of applied cathodic potential in a cell working at 650 °C in 10(-6) mbar O(2) ambient conditions. The most interesting findings are the temperature-induced and potential-dependent diffusion of Ni and Cr, and the oxidation-reduction processes resulting in specific morphology-composition changes in the Ni, Cr, and YSZ areas.

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“…Finsterbusch et al [19] studied that the chromium oxide coating on LSCF can result in the drastic decrease in the effective surface exchange coefficients kchem, which is considered to be responsible for the drastic increase in the ASR value of the LSCF cathode. Yang et al [20] addressed that the kchem of Nd 2 NiO 4+δ with 30 nm Cr was slightly decreased from the level of the sample without Cr-layer for 1000 h at 600°C. In the nickelate, Ni is enriched, while Nd is depleted in the Cr-rich surface zone [20][21][22], which may has a minor effect on k chem , and the increase in the ASR of Nd 2 Ni 0.95 Cu 0.05 O 4+δ .…”

Section: Resultsmentioning

confidence: 99%

“…Yang et al [20] addressed that the kchem of Nd 2 NiO 4+δ with 30 nm Cr was slightly decreased from the level of the sample without Cr-layer for 1000 h at 600°C. In the nickelate, Ni is enriched, while Nd is depleted in the Cr-rich surface zone [20][21][22], which may has a minor effect on k chem , and the increase in the ASR of Nd 2 Ni 0.95 Cu 0.05 O 4+δ . However, the effect on the cathode performance was reported to be negligible.…”

Section: Resultsmentioning

confidence: 99%

Cr Poisoning On Nd2Ni0.95Cu0.05O4+δ Cathode for Solid Oxide Fuel Cells

Choe

Lee

Hwang

2016

Archives of Metallurgy and Materials

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In this study, Nd2Ni1-xCuxO4+δ (x=0, 0.05, 0.1, and 0.2) layered perovskite powders were synthesized by the glycine nitrate process (GNP) and the chromium poisoning effect on the electrochemical performance of the Nd2Ni0.95Cu0.05O4+δ and La0.6Sr0.4Co0.2Fe0.8O3-δ cathodes were investigated. In the case of the LSCF cathode, the strontium chromite phase formed after the exposure of the gaseous chromium species, while there was no additional phase in the Nd2Ni0.95Cu0.05O4+δ cathode. The area specific resistance (ASR) of the Nd2Ni0.95Cu0.05O4+δ cathode did not change significantly after the exposure of the gaseous chromium species at 800°C.

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Effects of chromium poisoning on the long-term oxygen exchange kinetics of the solid oxide fuel cell cathode materials La0.6Sr0.4CoO3 and Nd2NiO4

Cited by 61 publications

References 41 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

In Situ X‐Ray Spectromicroscopy Investigation of the Material Stability of SOFC Metal Interconnects in Operating Electrochemical Cells

Cr Poisoning On Nd2Ni0.95Cu0.05O4+δ Cathode for Solid Oxide Fuel Cells

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