Low Temperature Performance and Durability of Solid Oxide Fuel Cells with Titanate Based Fuel Electrodes Using Reformate Fuel

Christensen, Jens Ole; Sudireddy, Bhaskar Reddy; Hagen, Anke

doi:10.1149/1945-7111/acbb31

Cited by 5 publications

(6 citation statements)

References 31 publications

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“…Thus, there seems to be an overlap of two processes related to 50 Hz occurring at two electrodes, which makes interpretations very challenging. Observations regarding effect of gas changes are agreeing with results by Christensen et al, 16 Hagen et al, 14 and Hagen et al 8 for the steam/hydrogen gas compositions on similar types of MSCs. Sometimes, a process at frequencies <1 Hz is observed.…”

Section: Resultssupporting

confidence: 90%

“…1000 Hz. They were observed in previous studies as well (e.g., 8,16 ) and can be ascribed mass transport (low frequency) and the triple phase boundary reaction (high frequency) at the Ni/YSZ fuel electrode. Higher steam content (increase from 4 to 20%) decreases the respective resistances (see circles and triangles in Fig.…”

Section: Resultssupporting

confidence: 72%

“…The ASR values of the better MSC is in the same range as obtained on similar cells (though obtained at slightly different conditions) in EC 8 and FC mode. 15,16 Figure 3 shows the initial EIS of the cells. As already seen from the iV curves (see Fig.…”

Section: Resultsmentioning

confidence: 99%

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Reversible Operation of Metal Supported Solid Oxide Cells

Hagen,

Tasca,

De Faria

et al. 2024

J. Electrochem. Soc.

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Solid oxide cells (SOCs) can operate in fuel cell and electrolysis mode. This option allows for production of electricity and heat from a green fuel in fuel cell mode and for storage of electricity as gas or use as fuel in electrolysis mode. Demonstration of reversible SOCs has progressed over the last few years. Increase of lifetime and reduction of costs are major factors for successful commercialization. In metal supported SOCs (MSCs) the thickest layer in the cell, the support layer of a few hundred µm, uses metal instead of Ni/YSZ cermet as in state-of-the-art (SoA) fuel electrode supported cells, thereby enabling a significant cost reduction. The present study investigates SoA Ni/YSZ SOCs and MSCs, fabricated by tape casting, lamination, and screen-printing, in reversible operation at 650oC in 50/50 steam/hydrogen. In the initial few hundred hours, the degradation rate in electrolysis mode is smaller on a MSC compared to a SoA Ni/YSZ cell, while they are comparable in fuel cell mode. According to electrochemical impedance evaluation, the degradation is due to a simultaneous increase of the serial and polarization resistances in the MSC, while it is mainly due to an increase of the polarization resistance in the SoA cell.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 72%

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Reversible Operation of Metal Supported Solid Oxide Cells

Hagen,

Tasca,

De Faria

et al. 2024

J. Electrochem. Soc.

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“…Due to the limited availability of the specific cells, the test was continued. The ASR values of the better MSC is in the same range as obtained on similar cells (though slightly different conditions) in EC ( 6) and FC mode (12,13). Figure 3 shows the initial EIS of the cells.…”

Section: Initial Performancesupporting

confidence: 64%

Reversible Metal Supported Solid Oxide Cells

Hagen,

Tasca,

De-Faria

et al. 2023

ECS Trans.

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Solid oxide cells (SOCs) can operate in fuel cell and electrolysis mode, allowing for production of electricity and heat from a green fuel, and for storage of electricity as gas or use as fuel. Lifetime and costs are major factors enabling commercialization. Metal supported SOCs (MSCs) provide cost-competitive materials within the cell. The present study investigates the reversible operation of MSCs, fabricated by tape casting, lamination, and screen-printing, at 650 oC in 50/50 steam/hydrogen gas. In the initial few hundred hours, the MSC show a lower degradation rate compared to a state-of-the-art (SoA) fuel electrode supported cell in the electrolysis mode, while it is ca. comparable in fuel cell mode. Electrochemical impedance evaluation revealed that the degradation is due to a simultaneous increase of the serial and polarization resistances in the MSC while it is mainly due to increase of the polarization resistance in the SoA cell.

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“…Figure 3 shows the iV curves in hydrogen fuel at low temperatures in comparison to SoA cells with Ni/YSZ anodes (from ref. (3)). The MSC with the allceramic anode shows the best performance under those conditions, demonstrating the potential of these cells.…”

Section: Materials and Electrode Developmentmentioning

confidence: 99%

Recent Highlights of Solid Oxide Fuel Cell and Electrolysis Research at DTU Energy

Hagen

Frandsen

2021

ECS Trans.

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Research on solid oxide concepts has a long tradition at the Department of Energy Conversion and Storage (DTU Energy) of the Technical University of Denmark. It spans from fundamental topics such as materials & electrode development over methodology development for example in micro structural & electrochemical characterization, up to the applied level, where integration of SOC with up- and down-stream processes becomes important. Significant funding from National and European programs supported this research. The presentation will introduce highlights of recent achievements in the areas of (i) materials & electrode development to reach higher activity and better durability, (ii) cell & stack development for lowering costs and increasing robustness, (iii) power to X concepts with special emphasis on X= fuels, (iv) lifetime & diagnostics approaches for accelerating durability studies, and (v) modelling from materials to stack levels aiding lifetime evaluation and designing of stacks & systems.

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Low Temperature Performance and Durability of Solid Oxide Fuel Cells with Titanate Based Fuel Electrodes Using Reformate Fuel

Cited by 5 publications

References 31 publications

Reversible Operation of Metal Supported Solid Oxide Cells

Reversible Operation of Metal Supported Solid Oxide Cells

Reversible Metal Supported Solid Oxide Cells

Recent Highlights of Solid Oxide Fuel Cell and Electrolysis Research at DTU Energy

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