Intermediate temperature SOFC – a promise for the 21st century

Huijsmans, J.P.P.; Berkel, F.P.F. van; Christie, G.M.

doi:10.1016/s0378-7753(97)02789-4

Cited by 342 publications

(156 citation statements)

References 5 publications

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“…Numerous approaches have been investigated to reduce the operating temperature of SOFCs for increased long-term stability and cost-efficiency [1]. Many efforts have focused on developing new electrode materials that are suitable for low temperatures (<700℃), as well as minimizing the resistivity of conventional electrode materials by optimizing their microstructures and compositions.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Fabrication Conditions for GDC Buffer Layer on Electrochemical Performance of Solid Oxide Fuel Cells

et al. 2013

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Abstract:A Gd-doped ceria (GDC) buffer layer is required between a conventional yttria-stabilized zirconia (YSZ) electrolyte and a La-Sr-Co-Fe-O3 (LSCF) cathode to prevent their chemical reaction. In this study, the effect of varying the conditions for fabricating the GDC buffer layer, such as sintering temperature and amount of sintering aid, on the solid oxide fuel cell (SOFC) performance was investigated. A finer GDC powder (i.e., ultra-high surface area), a higher sintering temperature (∼1290℃), and a larger amount of sintering aid (∼12%) resulted in improved densification of the buffer layer; however, the electrochemical performance of an anode-supported cell containing this GDC buffer layer was poor. These conflicting results are attributed to the formation of (Zr, Ce)O2 and/or excess cobalt grain boundaries (GBs) at higher sintering temperatures with a large amount of sintering aid (i.e., cobalt oxide). A cell comprising of a cobalt-free GDC buffer layer, which was fabricated using a low-temperature process, had lower cell resistance and higher stability. The results indicate that electrochemical performance and stability of SOFCs strongly depend on fabrication conditions for the GDC buffer layer.

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Section: Introductionmentioning

confidence: 99%

The Effect of Fabrication Conditions for GDC Buffer Layer on Electrochemical Performance of Solid Oxide Fuel Cells

et al. 2013

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“…(IT-SOFCs) [9] [10]; these may be achieved by either reducing the thickness of the electrolyte which reduces its ohmic resistance [11] [12] [13], developing new electrodes with improved catalytic activities which reduce overpotential [14] [15] [16] [17] or improving the electrode microstructure which increases the electrochemical reaction area [3] [18] [19].…”

Section: Introductionmentioning

confidence: 99%

An Isothermal Study of the Electrochemical Performance of Intermediate Temperature Solid Oxide Fuel Cells

Ighodaro¹,

Scott²,

Lü³

2017

JPEE

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A two-dimensional along the channel micro-scale isothermal model of a SOFC is developed and validated against experimental data and other simulated results from literature. The steady state behaviour of the cell was determined by numerical solution of the combined transport, continuity and kinetic equations. An important characteristic of the model is the consideration of the triple phase boundary as a distinct layer. The model is capable of predicting the cell performance including polarisation behaviour and power output. The model is used to study the effect of the support structure, geometric parameters and the effect of operating conditions on cell performance. Several parametric studies include the effect of operating conditions and geometric parameters on cell performance with a view to optimising the cell. The simulation results showed that the anode supported SOFC displayed the best performance with the activation and ohmic overpotentials being responsible for most of the voltage losses in the cell.

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“…• C to achieve acceptable efficiencies [1,2]. However, operation at such a high temperature causes some problems, including interfacial reaction between the components, mechanical and thermal degradation, thermal expansion, mismatch, and high cost materials.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Samaria-Doped Ceria Prepared by Pechini Method

Arabacı

Serin

2015

Acta Phys. Pol. A

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CeO2 ceramics doped with 20 mol.% samarium were prepared through the Pechini process. The samples were calcined at 400, 700 and 1000• C. The sintering behavior of the calcined SDC-20 powders was also investigated at 1400• C for 6 h. Microstructural and physical properties of SDC-20 samples were characterized with X-ray diffraction, scanning electron microscopy, thermogravimetry and impedance analysis methods. The results of the thermogravimetry/differential thermal analysis and X-ray diffraction indicated that a single-phase fluorite structure formed at a relatively low calcination temperature of 400• C. It is understood from the measured ionic conductivity values that the pellet formed from the SDC-20 samples calcined at 1000• C had lower resistance of grain-boundary than those of the pellets formed from the SDC-20 samples calcined at 400 and 700• C. The maximum ionic conductivity was measured as 1.95 × 10 −2 S cm −1 at 800

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Intermediate temperature SOFC – a promise for the 21st century

Cited by 342 publications

References 5 publications

The Effect of Fabrication Conditions for GDC Buffer Layer on Electrochemical Performance of Solid Oxide Fuel Cells

The Effect of Fabrication Conditions for GDC Buffer Layer on Electrochemical Performance of Solid Oxide Fuel Cells

An Isothermal Study of the Electrochemical Performance of Intermediate Temperature Solid Oxide Fuel Cells

Characteristics of Samaria-Doped Ceria Prepared by Pechini Method

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