Metal-supported SOFC with an aerosol deposited in-situ LSM and 8YSZ composite cathode

Baek, Seung-Wook; Jeong, Jihoon; Schlegl, Harald; Azad, Abul K.; Park, Dae Soo; Baek, Un Bong; Kim, Jung Hyun

doi:10.1016/j.ceramint.2015.10.039

Cited by 13 publications

(9 citation statements)

References 26 publications

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“…Apart from the mentioned players other MS-SOFC R&D activities are predominantly performed on button cell level by various university groups. [2][3][4][5][6][7][8][9][10][11] The present MS-SOFC designs are to our knowledge not optimized for mobile applications in terms of rapid startup and volumetric and gravimetric power densities. For example, the Plansee design consist of very thick substrates of 1 mm, 12,13 whereas exact specification of the Ceres Power cell and stack design is shrouded in some uncertainty.…”

mentioning

confidence: 99%

Towards High Power Density Metal Supported Solid Oxide Fuel Cell for Mobile Applications

Nielsen

Persson

Muhl

et al. 2018

J. Electrochem. Soc.

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For use of metal supported solid oxide fuel cell (MS-SOFC) in mobile applications it is important to reduce the thermal mass to enable fast startup, increase stack power density in terms of weight and volume and reduce costs. In the present study, we report on the effect of reducing the Technical University of Denmark (DTU) SoA MS-SOFCs support layer thickness from 313 μm gradually to 108 μm. The support layer thickness decrease in the DTU co-sintering MS-SOFC fabrication route results in an increased densification of the support layer and a slight decrease in performance. To mitigate the performance loss, two different routes for increasing the porosity of the support layer and thus performance were explored. The first route is the introduction of gas channels by puncturing of the green tape casted support layer. The second route is modification of the co-sintering profile. In summary, the cell thickness and thus weight and volume was reduced and the cell power density at 0.7 V at 700 • C was increased by 46% to 1.01 Wcm −2 at a fuel utilization of 48%. All modifications were performed on a stack technological relevant cell size of 12 cm × 12 cm. Solid oxide fuel cell (SOFC) is attractive due to the excellent power generation efficiency and fuel flexibility. The conventional ceramic electrolyte and anode supported SOFC (AS-SOFC) is limited to stationary power generation applications as a result of the difficulty of quick startup and the high operating temperatures of 700 to 1000 • C. If quick startup of a SOFC is realized, mobile applications may be considered. To enable this, it is important to shorten the startup time and reduce the heat cycle performance degradation and increase stack power density both in terms of weight and volume. As an approach to solving these problems, metal supported SOFCs (MS-SOFCs) have attracted attention. The development of this new generation of SOFC is currently in progress. DTU Energy's MS-SOFC technology is based on co-sintering of laminated tape casted electrolyte, anode and support layers in a reducing atmosphere. This implies that the sintering shrinkage of the different layers must be matched sufficiently so that the mechanical stresses originating from any mismatch in sintering shrinkage of the individual layers can be absorbed by the cell structure. If the cell structure is unable to absorb the mechanical stresses, the cell will crack. Perfect matching of sintering shrinkage of the layers is practically very difficult as e.g. the electrolyte layer needs to be completely dense and thus gastight, while the anode and support layers in contrast needs to be highly porous to allow sufficient gas transport.An overview and recent progress of MS-SOFCs have been reviewed in Ref. 1. The company Ceres Power founded in 2001 is at present the organization, which most effectively has demonstrated up scaled large cell sized >80 cm 2 MS-SOFC stack technology. This is followed by consortia involving the company Plansee. At last MS-SOFC stacking has been demonstrated within consortia consi...

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mentioning

confidence: 99%

Towards High Power Density Metal Supported Solid Oxide Fuel Cell for Mobile Applications

Nielsen

Persson

Muhl

et al. 2018

J. Electrochem. Soc.

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“…In general terms, the first arc contribution (appearing at higher frequencies and with C = 10 5 -10 6 F as in Figure 6 and Figure S3) at 550 • C may be due to the electrode-8YSZ electrolyte interface [67][68][69]. When the device is exposed to C 2 H 4 and CO, this resistance remains almost constant for the bare sensors, as well as when the device is infiltrated, firstly with Ti, Al, and Nb and secondly with Ni (see Figure 6).…”

Section: Electrochemical Impedance Spectroscopy Analysismentioning

confidence: 96%

Potentiometric C2H4-Selective Detection on Solid-State Sensors Activated with Bifunctional Catalytic Nanoparticles

Toldrá‐Reig

Serra

2021

Chemosensors

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This work presents a solid-state ionic-based device to selectively detect C2H4 in car exhaust gases. The sensor consists of 8YSZ as the electrolyte and two electrodes: Fe0.7Cr1.3O3/8YSZ and LSM/8YSZ. The main aim of this work is to optimize the catalytic behavior of the working electrode to C2H4 and reduce cross-sensitivity toward CO and H2O. Several catalyst nanoparticles were infiltrated to tailor C2H4 adsorption and electrochemical oxidation properties while diminishing adsorption and conversion of other gas components such as CO. The infiltrated metal catalysts were selected, taking into account both adsorption and redox properties. Infiltration of Ti or Al, followed by a second infiltration of Ni, enabled the selective detection of C2H4 with low cross-sensitivity toward CO and H2O in a moist gas environment. Further insight into potentiometric C2H4 sensing is achieved by electrochemical impedance analysis of the electrodes activated with bifunctional catalysts.

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“…Infiltration of Nicermets require further stabilization as was discussed by Tucker, 3 to maximize the performance. It is also imperative that the counter diffusion between Ni and Fe/Cr be minimal, as it is not very easy to introduce a barrier layer in an infiltrated cell morphology 71 are among the more recent developments in the choice of materials and fabrication techniques for MSCs (refer to Table 11 for the summary of data).…”

Section: Strategies For Deposition and Stabilization Of Cathodesmentioning

confidence: 99%

“…New cathode compositions such as (Bi 2 O 3 ) 0.7 (Er 2 O 3 ) 0.3 ‐Ag composite (2013), La 0.4 Sr 0.6 Co 0.2 Fe 0.7 Nb 0.1 O 3‐δ (2016), and a new aerosol deposition technique for LSM‐YSZ cathodes (2016) are among the more recent developments in the choice of materials and fabrication techniques for MSCs (refer to Table for the summary of data).…”

Section: Review Of Advanced Manufacturing and Cell‐stack Integrationmentioning

confidence: 99%

Recent developments in metal‐supported solid oxide fuel cells

Krishnan

2017

WIREs Energy & Environment

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Metal‐supported solid oxide fuel cells (MSCs) offer certain strategic advantages over the more conventional solid oxide fuel cells (SOFCs), which comprise only ceramic materials. Since alloys such as ferritic steels are very similar in their coefficient of thermal expansion (CTE) with ceramic components, viz., cerias, zirconias, and nickel oxide doped with either of them, they could provide excellent thermal cyclability while maintaining a strong interlayer bond. Therefore, in an anode‐supported cell the entire NiO‐ceramic support can be replaced by a ferritic steel porous support—the catalytically active NiO is therefore, a functional layer only. A huge savings in materials cost is achievable, because cerias and zirconias [usually doped with Y, Gd, Sm rare earth (RE) elements] are considerably more expensive that ferritic steels. Lowering the capital costs for SOFCs is an extensive global undertaking with US Department of Energy (DOE) laying down targets such as ~$ 200/kW for the stack itself, in order for SOFCs to become competitive with grid power costs and to offer a power source that promises 24 × 7 power supply for critical applications. This will eventually lead to a premier electricity generation device in the distributed power space, with the highest known electrical efficiencies (>50%). MSCs need very robust, high precision, and cost‐effective manufacturing techniques, which are scalable to high volumes. One of the main goals in this review is to showcase some of the work done in this area since the last review (2010), and to assess the technology challenges, and new solutions that have emerged over the past few years. WIREs Energy Environ 2017, 6:e246. doi: 10.1002/wene.246 This article is categorized under: Fuel Cells and Hydrogen > Science and Materials

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Metal-supported SOFC with an aerosol deposited in-situ LSM and 8YSZ composite cathode

Cited by 13 publications

References 26 publications

Towards High Power Density Metal Supported Solid Oxide Fuel Cell for Mobile Applications

Towards High Power Density Metal Supported Solid Oxide Fuel Cell for Mobile Applications

Potentiometric C2H4-Selective Detection on Solid-State Sensors Activated with Bifunctional Catalytic Nanoparticles

Recent developments in metal‐supported solid oxide fuel cells

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