Surface regulating and hetero-interface engineering of an LSCF cathode by CVD for solid oxide fuel cells: integration of improved electrochemical performance and Cr-tolerance

Xiong, Chunyan; Xu, Shan; Li, Xiantao; Liu, Tong; Tan, Yuan; Zhao, Pei; Qiu, Peng

doi:10.1039/d3ta02249h

J. Mater. Chem. A

2023

DOI: 10.1039/d3ta02249h

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Surface regulating and hetero-interface engineering of an LSCF cathode by CVD for solid oxide fuel cells: integration of improved electrochemical performance and Cr-tolerance

Chunyan Xiong¹,

Shan Xu²,

Xiantao Li³

et al.

Abstract: The sluggish oxygen reduction reaction (ORR) kinetics and the fast performance degradation caused by Cr-poisoning greatly hinder the commercialization of LaxSr1-xCoyFe1-yO3-θ cathode in Solid Oxide Fuel Cells (SOFCs). Herein, a...

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Cited by 9 publications

References 59 publications

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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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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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Surface functionalizing for high‐temperature ceramic fuel cells using electrochemical deposition technique

Nam,

Kim,

Kim

et al. 2024

InfoScience

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Electrochemical deposition technique, a method widely recognized for its precision and versatility in the electronics industry, is gaining attraction in the energy field, particularly in developing solid oxide fuel cells (SOFCs). Its ability to deposit metal compounds with nanostructures under simple ambient conditions makes it invaluable for modifying conventional electrodes with refined morphologies and compositions. In this mini‐review, we explore the principles of electrochemical deposition and highlight its recent applications in SOFC technology. Our focus lies on its pivotal role in fabricating coating layers or catalysts on electrodes with improved functionalities to build more efficient and durable fuel cells. Furthermore, we discuss emerging strategies for electrode surface modification and the potential of electrochemical deposition in advancing SOFC design and functionality. Our review also outlines future research directions aimed at harnessing and expanding the capabilities of electrochemical deposition in energy conversion applications.

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Developing high-performance oxygen electrodes for intermediate solid oxide cells (SOC) prepared by Ce0.8Gd0.2O2−δ backbone infiltration

Aksoy,

Lemieszek,

Murutoğlu

et al. 2024

Appl. Phys. A

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Gd0.2Ce0.8O 2−δ (GDC) porous backbone infiltration with La0.6Sr0.4CoO3−δ (LSC), PrOx and LSC: PrOx as a composite oxygen electrode for intermediate solid oxide cells are conducted within the scope of this work. Samples were characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and electrochemical impedance spectroscopy (EIS). A uniform distribution of the infiltrated material inside the backbone and at the electrolyte-backbone interface was achieved. EIS measurements on the prepared symmetrical samples showed electrode polarization resistance (Rp) values of 0.029 Ω.cm², 0.23 Ω.cm², and 0.44 Ω.cm² for LSC, LSC: PrOx, and PrOx at 600 °C, respectively. Long-term stability measurements at 600 °C for 100 h showed a slight increase in polarization resistance during the measurement period. Fuel cell measurements of commercial cells (Elcogen) with porous oxygen electrode consisting of GDC infiltrated with LSC showed an increase in power density compared to the reference cell with a value of 0.53 W.cm− 2 obtained at 600 °C. It is proven that infiltration via polymeric precursor into porous scaffolds as backbone oxygen electrode layer is effective and convenient method to develop high performance and stable solid oxide cells.

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Surface regulating and hetero-interface engineering of an LSCF cathode by CVD for solid oxide fuel cells: integration of improved electrochemical performance and Cr-tolerance

Abstract: The sluggish oxygen reduction reaction (ORR) kinetics and the fast performance degradation caused by Cr-poisoning greatly hinder the commercialization of LaxSr1-xCoyFe1-yO3-θ cathode in Solid Oxide Fuel Cells (SOFCs). Herein, a...

Cited by 9 publications

References 59 publications

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

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

Surface functionalizing for high‐temperature ceramic fuel cells using electrochemical deposition technique

Developing high-performance oxygen electrodes for intermediate solid oxide cells (SOC) prepared by Ce0.8Gd0.2O2−δ backbone infiltration

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