Realisation of an anode supported planar SOFC system

Buchkremer, H.P.; Stoever, D.; Diekmann, Uwe

doi:10.2172/460193

Cited by 5 publications

(3 citation statements)

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“…Since the early 90s Research Centre Jtilich has made tremendous progress in the development of anode-supported planar SOFCs as is documented in several status reports [1,[4][5][6][7]. The main improvements in materials and components development during the past five years have been the introduction of composite electrodes resulting in better cell performance, the application of ferritic steel as the interconnect and housing material, and an optimised sealing glass with high thermal expansion coefficient and high glass transition temperature.…”

Section: Currently Used Materials For Anode-supported Planar Sofc At mentioning

confidence: 99%

Thermal expansion of SOFC materials

Tietz

1999

Ionics

322

113

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Abstract.A short overview is given for the thermal expansion of solid oxide fuel cell materials. The thermomechanical compatibility of state-of-the-art materials is compared with alternative, new materials. With these alternatives a better adjustment of the thermal expansion coefficients of the various fuel cell components is possible and fuel cells based on the newly developed materials are proposed.

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Section: Currently Used Materials For Anode-supported Planar Sofc At mentioning

confidence: 99%

Thermal expansion of SOFC materials

Tietz

1999

Ionics

322

113

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“…Half cells comprised of NiO / YSZ anode support and anode functional layer, and YSZ electrolyte were used as substrates for the deposition of Ce 0.8 Gd 0.2 O 2-δ (GDC) interlayers. The half-cell substrates were fabricated following the procedures developed at the Forschungszentrum Jülich and further details regarding cell fabrication are described elsewhere (10). Coatings were carried out in a physical vapor deposition system CS 400ES (Von Ardenne Anlagentechnik).…”

Section: Methodsmentioning

confidence: 99%

Bias-Assisted Sputtering of Gadolinia-Doped Ceria Interlayers for Solid Oxide Fuel Cells

Fonseca¹,

Uhlenbruck

Nédélec

et al. 2009

ECS Trans.

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The effects of both temperature and applied bias power during the sputtering of gadolinia-doped ceria (GDC) interlayers used as diffusion barriers in anode-supported solid oxide fuel cells (SOFC) were investigated. Scanning electron microscopy analysis revealed that increasing the applied bias power, in the 0-300 W range, progressively inhibits the columnar structure typically observed in sputtered films, favoring the deposition of dense interlayers. Such feature was mirrored in the electrochemical tests of single cells that demonstrated enhanced power density for SOFC with bias-assisted sputtered interlayers. In addition, similar electrochemical performances of fuel cells having interlayers deposited in the 400-800°C temperature range indicated that the applied bias allows for the sputtering of GDC protective interlayers at relatively lower temperatures than unbiased depositions. The presented results evidenced that bias-assisted sputtering is an effective technique for the fabrication of high-performance anode supported SOFC.

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“…By physical vapor deposition, a dense, 0.5 µm thick CGO interlayer is applied (13). Details of the manufacturing can be found in (14,15). The cell was tested via electrochemical impedance spectroscopy before 3D reconstruction.…”

Section: Sample Preparationmentioning

confidence: 99%

Detailed Microstructure Analysis and 3D Simulations of Porous Electrodes

et al. 2011

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The microstructure of a high performance LSCF-cathode is reconstructed using a dual-beam focused ion beam / scanning electron microscopy (FIB/SEM) system. The corrected reconstruction data representing altogether a volume of ~ 2800µm3 are the basis for the calculation of the microstructure parameters (i) volume-specific surface area, (ii) volume/porosity fraction and (iii) tortuosity. An analysis of the influence of the size of the reconstructed volume on the microstructure parameters is performed. Thereby the FIB/SEM data were resampled with different sizes and the influence of the resampling on the parameters is investigated. These parameters constitute the basis to calculate cathode performance via simplified microstructure models (1). However, it would be desirable to fit the reconstructed microstructure directly into a more accurate 3D-model. First results of a 3D finite element method model, which enables a direct use of the corrected 3D FIB/SEM data, are presented here.

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Realisation of an anode supported planar SOFC system

Cited by 5 publications

References 0 publications

Thermal expansion of SOFC materials

Thermal expansion of SOFC materials

Bias-Assisted Sputtering of Gadolinia-Doped Ceria Interlayers for Solid Oxide Fuel Cells

Detailed Microstructure Analysis and 3D Simulations of Porous Electrodes

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