An effective strategy to enhancing tolerance to contaminants poisoning of solid oxide fuel cell cathodes

Chen, Yu; Yoo, Seonyoung; Li, Xiaxi; Ding, Dong; Pei, Kai; Chen, Dongchang; Ding, Y.; Zhao, Bote; Murphy, Ryan; deGlee, Ben; Liu, Jiang; Liu, Meilin

doi:10.1016/j.nanoen.2018.03.043

Cited by 78 publications

(50 citation statements)

References 35 publications

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“…It is notable that the MP catalyst‐coated LSCF cathode in this work shows a comparable stability but higher activity compared to the PNM‐coated LSCF cathode reported previously (Figure 4a‐iv). [ 20 ] Durability of the MP catalyst‐coated LSCF cathode was further investigated at a lower temperature of 650 °C for a longer period of time (500 h). As shown in Figure S6, Supporting Information, and Figure 4a, the coated LSCF cathode exhibits a higher stability at 650 °C than that at 750 °C.…”

Section: Resultsmentioning

confidence: 99%

“…BCFN cathode and PNM‐PrO x ‐coated LSCF cathode from refs. [ 51 ] and [ 20 ] , respectively, were added for comparison. b) EIS curves of bare LSCF and MP catalyst‐coated LSCF electrodes measured at different time at 750 °C in dry air with the presence of Cr contamination.…”

Section: Resultsmentioning

confidence: 99%

“…The Cr‐tolerance test set‐up and more details can be found in the authors’ previous work. [ 20 ] The humidified air was introduced to the system by flowing air through a water bubbler at room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…[ 17–19 ] The Sr segregation and Cr‐poisoning effect will be significantly exacerbated by the presence of H 2 O. [ 20–23 ]…”

Section: Introductionmentioning

confidence: 99%

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Enhancing Oxygen Reduction Activity and Cr Tolerance of Solid Oxide Fuel Cell Cathodes by a Multiphase Catalyst Coating

Niu

Zhou

et al. 2021

Adv Funct Materials

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Intermediate temperature solid oxide fuel cells (IT‐SOFCs) are cost‐effective and efficient energy conversion systems. The sluggish oxygen reduction reaction (ORR) and the degradation of cathodes are critical challenges to the commercialization of IT‐SOFCs. Here, a highly efficient multiphase (MP) catalyst coating, consisting of Ba1−xCo0.7Fe0.2Nb0.1O3−δ (BCFN) and BaCO3, to enhance the ORR activity and durability of the state‐of‐the‐art lanthanum strontium cobalt ferrite (La0.6Sr0.4Co0.2Fe0.8O3−δ, LSCF) cathode is reported. The conformal MP catalyst‐coated LSCF cathode shows a polarization resistance (Rp) of 0.048 Ω cm2 at 650 °C, about one order of magnitude smaller than that of the bare LSCF. In an accelerated Cr‐poisoning test, the degradation rate of the catalyst‐coated LSCF electrode is 10−3 Ω cm2 h−1 (0.59% h−1) over 200 h, only one fifth of the degradation rate of the bare LSCF electrode at 750 °C. In addition, anode‐supported single cells with the MP catalyst‐coated LSCF cathode show a dramatically enhanced peak power density (1.4 W cm−2 vs 0.67 W cm−2 at 750 °C) and increased durability against Cr and H2O. Both experimental results and density functional theory‐based calculations indicate that the BCFN phase improves the ORR activity while the BaCO3 phase enhances the stability of the LSCF cathode.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…[ 17–19 ] The Sr segregation and Cr‐poisoning effect will be significantly exacerbated by the presence of H 2 O. [ 20–23 ]…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhancing Oxygen Reduction Activity and Cr Tolerance of Solid Oxide Fuel Cell Cathodes by a Multiphase Catalyst Coating

Niu

Zhou

et al. 2021

Adv Funct Materials

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“…Recently, surface modification via infiltration of oxygen electrodes with catalytically-active nanoparticles/coating has emerged as an effective approach to enhance the activity. 14,[21][22][23] Those nanoparticles/coatings are generally introduced by infiltration of nitrate solutions that subsequently decomposed via heat treatment. By this approach the overall composition of the coating is well controlled but the phase and the morphology of coating, which is also important for performance, is not well controlled.…”

Section: Promotion Of Oxygen Reduction and Evolution By Applying A Nanoengineered Hybrid Catalyst On Cobalt Free Electrodes For Solid Oximentioning

confidence: 99%

Promotion of oxygen reduction and evolution by applying a nanoengineered hybrid catalyst on cobalt free electrodes for solid oxide cells

Tong

Tripković

et al. 2020

J. Mater. Chem. A

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Heterogeneous Catalyst Coating for Boosting the Activity and Chromium Tolerance of Cathodes for Solid Oxide Fuel Cells

Huang,

Liang,

Zhao

et al. 2024

Adv Funct Materials

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A challenge hindering the development of durable solid oxide fuel cells (SOFCs) is the significant performance degradation of cathodes owing to poisoning by volatile Cr originating from the Fe─Cr alloy interconnect. Herein, a heterogeneous catalyst coating, composed of Ba1−xCe0.8Gd0.2O3–δ and BaCO3, remarkably improves the oxygen adsorption, dissociation capability, and Cr resistance of a La0.6Sr0.4Co0.2Fe0.8O3–δ (LSCF) cathode is demonstrated. The coherent heterointerface interactions formed between the catalyst coating and LSCF result in varied levels of surface strain and electrostatic interactions, significantly suppressing Sr surface segregation on LSCF. A single cell with the catalyst coating‐decorated LSCF (CC‐LSCF) achieves a peak power density of 1.73 W cm−2 at 750 °C, with no noticeable performance degradation for 100 h. The CC‐LSCF cathode also exhibits outstanding durability under accelerated Cr poisoning conditions, compared with the tremendous degradation rate of 0.42% h−1 for the bare LSCF cathode. The enhanced Cr resistance is attributed to synergy induced by the stabilization of the lattice Sr cations by heterointerface interactions and the remarkable structural stability of the catalyst coating under Cr poisoning conditions. The novel heterointerface engineering strategy in this study provides insight into the design and development of active and Cr‐tolerant cathodes.

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An effective strategy to enhancing tolerance to contaminants poisoning of solid oxide fuel cell cathodes

Cited by 78 publications

References 35 publications

Enhancing Oxygen Reduction Activity and Cr Tolerance of Solid Oxide Fuel Cell Cathodes by a Multiphase Catalyst Coating

Enhancing Oxygen Reduction Activity and Cr Tolerance of Solid Oxide Fuel Cell Cathodes by a Multiphase Catalyst Coating

Promotion of oxygen reduction and evolution by applying a nanoengineered hybrid catalyst on cobalt free electrodes for solid oxide cells

Heterogeneous Catalyst Coating for Boosting the Activity and Chromium Tolerance of Cathodes for Solid Oxide Fuel Cells

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