Electrocatalytic activity compensation mechanism upon long-term operation of solid oxide fuel cells; LSCM cathode/SDC interlayer/YSZ electrolyte system

Solid oxide fuel cells (SOFCs) enable environmentally friendly energy to be produced with high efficiency. The market entry of SOFC systems depends on the functionality of the components and on the costs. The SOFC has not yet reached market maturity. This presentation focuses on the possibilities for manufacturing SOFCs with high power outputs and long-term durability by using manufacturing technologies feasible in industry. For the past 15 years, FZ Jülich has been developing large-size so-called anode-supported SOFCs (up to 200 x 200 mm²) with reproducibly high power output (> 2 A/cm² at 800°C). Novel technologies for high-capacity manufacturing such as tape casting and roller coating have been introduced. Additionally, newly developed thin-film techniques have led to power outputs of more than 3 A/cm² at 800°C and more than 1.5 A/cm² below 700°C. These high power densities open up new possibilities for the operation of SOFCs at low temperatures to ensure low degradation and therefore long lifetimes.

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Imaging of Oxide Ionic Diffusion at Cathode/Interlayer/Electrolyte Interfaces for Solid Oxide Fuel Cells: long-term operation effects

ECS Meeting Abstracts ◽

10.1149/ma2012-02/16/1973 ◽

2012 ◽

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Solid Oxide ◽

Ionic Diffusion ◽

Oxide Fuel ◽

Term Operation ◽

Cathode Interlayer

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Imaging of Oxide Ionic Diffusion at Cathode/Interlayer/Electrolyte Interfaces in Solid Oxide Fuel Cells: Effects of Long-Term Operation

Journal of The Electrochemical Society ◽

10.1149/2.069208jes ◽

2012 ◽

Vol 159 (8) ◽

pp. F476-F481 ◽

Cited By ~ 14

Author(s):

Teruhisa Horita ◽

DoHyung Cho ◽

Taro Shimonosono ◽

Haruo Kishimoto ◽

Katsuhiko Yamaji ◽

...

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Solid Oxide ◽

Ionic Diffusion ◽

Oxide Fuel ◽

Term Operation ◽

Cathode Interlayer

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Influence of (La,Sr)MnO3+δ cathode composition on cathode/electrolyte interfacial structure during long-term operation of solid oxide fuel cells

Journal of Power Sources ◽

10.1016/j.jpowsour.2013.05.162 ◽

2013 ◽

Vol 242 ◽

pp. 790-796 ◽

Cited By ~ 15

Author(s):

Toshiaki Matsui ◽

Yuichi Mikami ◽

Hiroki Muroyama ◽

Koichi Eguchi

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Solid Oxide ◽

Interfacial Structure ◽

Oxide Fuel ◽

Term Operation

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Ni–M (M = Sn and Sb) intermetallic-based catalytic functional layer as a built-in safeguard for hydrocarbon-fueled solid oxide fuel cells

Journal of Materials Chemistry A ◽

10.1039/c5ta05498b ◽

2015 ◽

Vol 3 (43) ◽

pp. 21824-21831 ◽

Cited By ~ 8

Author(s):

Daeil Yoon ◽

Arumugam Manthiram

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Solid Oxide ◽

Anode Surface ◽

Oxide Fuel ◽

Functional Layer ◽

Term Operation

(Sn, Sb)/Ni-based catalytic functional layers situated at the anode surface facilitate long-term operation of hydrocarbon-fueled solid oxide fuel cells by inhibiting the carbon from accumulating onto the Ni surface.

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Long-term operation of solid oxide fuel cells and preliminary findings on accelerated testing

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2020.01.074 ◽

2020 ◽

Vol 45 (15) ◽

pp. 8955-8964 ◽

Cited By ~ 7

Author(s):

Ludger Blum ◽

Qingping Fang ◽

Sonja M. Groß-Barsnick ◽

L.G.J. (Bert) de Haart ◽

Jürgen Malzbender ◽

...

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Solid Oxide ◽

Accelerated Testing ◽

Oxide Fuel ◽

Term Operation

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Computational engineering of the oxygen electrode-electrolyte interface in solid oxide fuel cells

npj Computational Materials ◽

10.1038/s41524-021-00584-8 ◽

2021 ◽

Vol 7 (1) ◽

Author(s):

Kaiming Cheng ◽

Huixia Xu ◽

Lijun Zhang ◽

Jixue Zhou ◽

Xitao Wang ◽

...

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Microstructure Evolution ◽

Oxygen Electrode ◽

Solid Oxide ◽

Ohmic Loss ◽

Oxide Fuel ◽

Computational Engineering ◽

Electrolyte Interface

AbstractThe Ce0.8Gd0.2O2−δ (CGO) interlayer is commonly applied in solid oxide fuel cells (SOFCs) to prevent chemical reactions between the (La1−xSrx)(Co1−yFey)O3−δ (LSCF) oxygen electrode and the Y2O3-stabilized ZrO2 (YSZ) electrolyte. However, formation of the YSZ–CGO solid solution with low ionic conductivity and the SrZrO3 (SZO) insulating phase still happens during cell production and long-term operation, causing poor performance and degradation. Unlike many experimental investigations exploring these phenomena, consistent and quantitative computational modeling of the microstructure evolution at the oxygen electrode–electrolyte interface is scarce. We combine thermodynamic, 1D kinetic, and 3D phase-field modeling to computationally reproduce the element redistribution, microstructure evolution, and corresponding ohmic loss of this interface. The influences of different ceramic processing techniques for the CGO interlayer, i.e., screen printing and physical laser deposition (PLD), and of different processing and long-term operating parameters are explored, representing a successful case of quantitative computational engineering of the oxygen electrode–electrolyte interface in SOFCs.

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