LSCF Cathode Research Articles

Fabrication and Characterisation of La<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.2</sub>Fe<sub>0.8</sub>O<sub>3-δ</sub>-SDC Composite Cathode

Composite cathode is a promising material to be used as electrodes in fuel cells. The fabricated composite cathode materials in this study are comprised of a mixture of submicron La0.6Sr0.4Co0.2Fe0.8O3- (LSCF6428) powders with two types of nanoscale ionically conducting ceramic electrolyte materials, samarium-doped ceria (SDC) and SDC-carbonate (SDCc). 30 – 50 wt% of electrolyte materials are added to the LSCF6428 cathode via the solid state method. The composite powders were ball-milled in ethanol and calcined at the temperature range of 800°C to 900°C for 2 hours in air. The composite cathode powders are characterised in terms of morphology and crystal structure. It is found that after calcining, the LSCF and the electrolyte materials retained their original structures as there was no chemical reaction between the two components. In addition, the LSCF-SDC composite cathode powders were found to exhibit a narrower distribution in size compared to the LSCF-SDC carbonate powders.

Solid oxide fuel cells with Sm 0.2Ce 0.8O 2− δ electrolyte film deposited by novel aerosol deposition method

In this study, dense electrolyte ceramic Sm 0.2Ce 0.8O 2− δ (SDC) thin films are successfully deposited on NiO-SDC anode substrate by aerosol deposition (AD) with oxygen as the carrier gas at the substrate temperature ranging from room temperature to 300 °C. To remove the effect of humidity on the starting powders, this study found that, in depositing SDC films, having the starting powders preheat-treated at 200 °C helped generate a smooth and dense layer, though a lower deposition rate was achieved. At a deposition time of 22 min, SDC films with a uniform thickness of 1.5 μm and grain sizes of ≈67 nm are obtained. SOFC single cells are then built by screen printing a LSCF cathode on the anode-supported substrates with SDC electrolyte. The cross-sectional SEM micrographs exhibit highly dense, granular, and crack-free microstructures. The open circuit voltages (OCV) of the single cells decrease with the rise in temperature, dropping from 0.81 V at 500 °C to 0.59 V at 700 °C. Maximum power densities (MPD) decline with decreasing operating temperature from 0.34 to 0.01 W cm −2 due to the increase of the R 0 and R P of the single cells. The electrochemical results testify to the fine quality of SDC films as well as illustrate the electrolyte thickness effect and the effect of mixed ionic and electronic conduction of the SDC electrolyte in the reducing atmosphere.

Nano-structured solid oxide fuel cell design with superior power output at high and intermediate operation temperatures

A solid oxide fuel cell (SOFC) with a thin-film yttria-stabilized zirconia (YSZ) electrolyte was developed and tested. This novel SOFC shows a similar multilayer set-up as other current anode-supported SOFCs and is composed of a Ni/8YSZ anode, a gas-tight 8YSZ electrolyte layer, a dense Sr-diffusion barrier layer and a LSCF cathode. To increase the power density and lower the SOFC operating temperature, the thickness of the electrolyte layer was reduced from around 10 μm in current cells to 1 μm, using a nanoparticle deposition method. By using the novel 1 μm electrolyte layer, the current density of our SOFC progressed to 2.7, 2.1 and 1.6 A/cm2 at operation temperatures of 800, 700 and 650°C, respectively, and out-performs all similar cells reported to date in the literature. An important consideration is also that cost-effective dip-coating and spin-coating methods are applied for the fabrication of the thin-film electrolyte. Processing of 1 μm layers on the very porous anode substrate material was initially experienced as very difficult and therefore 8YSZ nanoparticle coatings were developed and optimized on porous 8YSZ model substrates and transferred afterwards to regular anode substrates. In this paper, the preparation of the novel SOFC is shown and its morphology is illustrated with high resolution SEM pictures. Further, the performance in a standard SOFC test is demonstrated.

Electrical Properties in GDC (Gd2O3-Doped CeO2)/LSCF (La0.6Sr0.4Co0.2Fe0.8O3) Cathode Composites for Intermediate Temperature Solid Oxide Fuel Cells

Gd₂O₃-doped CeO₂2 (GDC) and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O₃ (LSCF) composite cathode materials were prepared in order to be applied to intermediate-temperature solid oxide fuel cells. The electrochemical polarization was evaluated using ac impedance spectroscopy involving geometric restriction at the interface between an ionic electrolyte and a mixed-conducting cathode. In order to optimize the cathode composites applicable to a GDC electrolyte, the cathode composites were evaluated in terms of polarization losses with regard to a given electrolyte, i.e., GDC electrolyte. The polarization increased significantly with decreasing temperature and was critically dependent on the compositions of the composite cathodes. The optimized cathode composite was found to consist of GDC 50 wt% and LSCF 50 wt%; the corresponding normalized polarization loss was calculated to be 0.64 at 650℃.

Sulfur Poisoning on La0.6Sr0.4Co0.2Fe0.8O3 Cathode for SOFCs

The effect of SO2 content in air on degradation of a La0.6Sr0.4Co0.2Fe0.8O3 (LSCF6428) cathode for solid oxide fuel cells was investigated at T = 1073 K for 24 h by setting the concentration of SO2 to 0.1, 1, 10, and 100 ppm. The degradation of the LSCF6428 cathode became more significant with increasing SO2 concentrations due to the increase of cathode polarization resistance. The SrSO4 formation was confirmed after exposing to SO2 from 0.1 to 100 ppm and became even harsh with increasing SO2 concentrations. The reaction sequence can be interpreted from thermodynamic considerations using chemical potential diagrams and chemical equilibrium calculations.

Electrochemical performance of unsintered Ba 0.5Sr 0.5Co 0.8Fe 0.2O 3− δ, La 0.6Sr 0.4Co 0.8Fe 0.2O 3− δ, and La 0.8Sr 0.2MnO 3− δ cathodes for metal-supported solid oxide fuel cells

The electrochemical performances of Ba 0.5Sr 0.5Co 0.8Fe 0.2O 3− δ (BSCF), La 0.6Sr 0.4Co 0.8Fe 0.2O 3− δ (LSCF), and La 0.8Sr 0.2MnO 3− δ (LSM) cathodes fabricated without pre-sintering were studied. The BSCF starting powder prepared by the glycine nitrate method exhibited a single perovskite structure and no secondary phase was detected using XRD. SEM images revealed that the unsintered BSCF particles were highly agglomerated even before exposure to the operating temperature of the solid oxide fuel cell (SOFC). Unlike the LSM and LSCF cathodes, the BSCF cathode could be sintered at the SOFC operating temperature of 1073 K, and therefore exhibited porosity and good connectivity among particles. As determined using electrochemical impedance spectroscopy measurements, the lowest polarization resistances were found to be 0.13 Ω cm 2 for unsintered BSCF, 0.22 Ω cm 2 for unsintered LSCF, and 3.19 Ω cm 2 for unsintered LSM. The single-cell power density curves had maximal power densities of 0.91 W cm −2, 0.77 W cm −2, 0.60 W cm −2 for anode-supported SOFCs using unsintered BSCF, LSCF, and LSM cathodes, respectively. For practical aspect, the power densities of 0.72, 0.6 and 0.5 W cm −2 were obtained at 0.7 V from anode-supported SOFCs with unsintered BSCF, LSCF and LSM cathodes, respectively. The metal-supported cells having unsintered BSCF cathode had maximum power densities at 0.82 W cm −2, and a power density of 0.74 W cm −2 at 0.7 V was observed.

Low temperature deposited (Ce,Gd)O2−x interlayer for La0.6Sr0.4Co0.2Fe0.8O3 cathode based solid oxide fuel cell

Application of La0.6Sr0.4Co0.2Fe0.8O3 perovskites cathode in solid oxide fuel cell (SOFC) can benefit from its high electrocatalytic activity at 600–800°C. However, due to the chemical and mechanical incompatibility between the LSCF cathode and state-of-the-art yttria stabilized zirconia (YSZ) electrolyte, a ceria-based oxide barrier interlayer is usually introduced. In this work, gadolinia doped ceria (GDC) interlayers are prepared by screen printing (SP), electron beam evaporation (EB) and ion assisted deposition (IAD) methods. The microstructures of the GDC interlayers show great dependence on the deposition methods. The 1250°C-sintered SP interlayer exhibits a porous microstructure. The EB method generates a thin and compact interlayer at a low substrate temperature of 250°C. With the help of additional energetic argon and oxygen ions bombardment on the deposited species, the IAD method yields the densest GDC interlayer at the same substrate temperature, which leads to the best electrochemical performance of LSFC-based SOFC.

Enhanced Performance of La0.6Sr0.4Co0.2Fe0.8O3-\delta(LSCF) Cathodes with Graded Microstructure Fabricated by Tape Casting

La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) powders with different particle sizes, synthesized through a citrate complexation method and a gel-casting technique, are used to fabricate porous LSCF cathodes with graded microstructures via tape casting. To create porous electrodes with desired porosity and pore structures, graphite and starch are used as pore former for different layers of the graded cathode. Examination of the microstructures of the as-prepared LSCF cathode using an SEM revealed that both grain size and porosity changed gradually from the catalytically active layer (near the electrodeelectrolyte interface) to the current collection layer (near the electrode-interconnect interface). Impedance analysis showed that a 3-layer LSCF cathode with graded microstructures exhibited much-improved performance compared to that of a single-layer LSCF cathode, corresponding to interfacial resistance of 0.053, 0.11, and 0.27 Ω·cm 2 at 800, 750, and 700 o C respectively.

New insights in the polarization resistance of anode-supported solid oxide fuel cells with La 0.6Sr 0.4Co 0.2Fe 0.8O 3 cathodes

In this study, the polarization resistance of anode-supported solid oxide fuel cells (SOFC) with La 0.6Sr 0.4Co 0.2Fe 0.8O 3 (LSCF) cathodes was investigated by I– V sweep and electrochemical impedance spectroscopy under a series of operating voltages and cathode environments (i.e. stagnant air, flowing air, and flowing oxygen) at temperatures from 550 °C to 750 °C. In flowing oxygen, the polarization resistance of the fuel cell decreased considerably with the applied current density. A linear relationship was observed between the ohmic-free over-potential and the logarithm of the current density of the fuel cell at all the measuring temperatures. In stagnant or flowing air, an arc related to the molecular oxygen diffusion through the majority species (molecular nitrogen) present in the pores of the cathode was identified at high temperatures and high current densities. The magnitude of this arc increased linearly with the applied current density due to the decreased oxygen partial pressure at the interface of the cathode and the electrolyte. It is found that the performance of the fuel cell in air is mainly determined by the oxygen diffusion process. Elimination of this process by flowing pure oxygen to the cathode improved the cell performance significantly. At 750 °C, for a fuel cell with a laser-deposited Sm 0.2Ce 0.8O 1.9 (SDC) interlayer, an extraordinarily high power density of 2.6 W cm −2 at 0.7 V was achieved in flowing oxygen, as a result of reduced ohmic and polarization resistance of the fuel cell, which were 0.06 Ω cm 2 and 0.03 Ω cm 2, respectively. The results indicate that microstructural optimization of the LSCF cathode or adoption of a new cell design which can mitigate the oxygen diffusion limitation in the cathode might enhance cell performance significantly.

Electrochemical Performance and Stability of the Cathode for Solid Oxide Fuel Cells: III. Role of Volatile Boron Species on LSM/YSZ and LSCF

Boron oxide is a key component to tailor the softening temperature and viscosity of the sealing glass for solid oxide fuel cells (SOFCs). The primary concern regarding the use of boron-containing sealing glasses is the volatility of boron species, which possibly results in cathode degradation. In this paper, we report the role of volatile boron species on the electrochemical performance of LSM/yttria-stabilized zirconia (YSZ) and LSCF cathodes at various SOFC operation temperatures. The transport rate of boron, was measured at with air saturated with moisture. A reduction in power density was observed in the cells with the LSM/YSZ cathodes after the introduction of boron source to the cathode air stream. A partial recovery of the power density was observed after the boron source was removed. Results from post-test secondary-ion mass spectroscopy (SIMS) analysis showed that the partial recovery in the power density correlated with the partial removal of the deposited boron by the clean air stream. The presence of boron was also observed in the LSCF cathodes by SIMS analysis; however, the effect of boron on the electrochemical performance of the LSCF cathode was negligible. The coverage of triple phase boundaries in LSM/YSZ was postulated as the cause for the observed reduction in the electrochemical performance.

Electrochemical Performance and Stability of the Cathode for Solid Oxide Fuel Cells: IV. On the Ohmic Loss in Anode-Supported Button Cells with LSM or LSCF Cathodes

Anode-supported solid oxide fuel cells with a variety of yttria-stabilized zirconia (YSZ) electrolyte thicknesses were fabricated by tape casting and lamination. Preparation of the YSZ electrolyte tapes with various thicknesses was accomplished by using doctor blades with different gaps between the precision machined, polished blade and the casting surface. The green tape was cut into disks, sintered at for 2 h, and subsequently creep-flattened at for 2 h. Either (LSCF) with an (SDC) interlayer or an composite was used as the cathode material for the fuel cells. The ohmic resistances of these anode-supported fuel cells were characterized by electrochemical impedance spectroscopy at temperatures from 500 to . A linear relationship was found between the ohmic resistance of the fuel cell and the YSZ electrolyte thickness at all the measuring temperatures for both LSCF and cathode fuel cells. The ionic conductivities of the YSZ electrolyte, derived for the fuel cells with or LSCF cathodes, were independent of the cathode material and cell configuration. The ionic conductivities of the YSZ electrolyte were slightly lower than that of the bulk material possibly due to Ni doping into the electrolyte. The fuel cell with an SDC interlayer and an LSCF cathode showed a larger intercept resistance than the fuel cell with an cathode, which was possibly due to the imperfect contact between the SDC interlayer and the YSZ electrolyte and the migration of Zr into the SDC interlayer to form an insulating solid solution during cell fabrication. Calculations of the contribution of the YSZ electrolyte to the total ohmic resistance showed that YSZ was still a satisfactory electrolyte at temperatures above . Explorations should be directed to reduce the intercept resistance to achieve significant improvement in cell performance.

Fabrication by Co-extrusion and electrochemical characterization of micro-tubular hollow fibre solid oxide fuel cells

A phase inversion process was used to co-extrude cerium–gadolinium oxide (Ce 0.9Gd 0.1O 1.95)/NiO–CGO dual-layer hollow fibres (HF), which were then sintered to form, respectively, the electrolyte and high porosity anode precursor of a solid oxide fuel cell (SOFC) with anode inner diameter of 0.8 mm. Graded CGO–lanthanum strontium cobalt ferrite (La 0.6Sr 0.4Fe 0.8Co 0.2O 3) cathode layers were then painted onto the CGO electrolyte to form a micro-tubular HF-SOFC. With a carefully designed anode current collector, this produced maximum power densities of 1186–5864 W m − 2 at 450–570 °C. High magnification imaging analysis revealed large three-phase boundary regions within the anode, a dense electrolyte layer and clearly highlighted the multiple CGO–LSCF cermet and pure LSCF cathode layers. The performance of the HF-SOFC with a twenty millimetre active length showed no degradation after four thermal cycles between 300 °C and 570 °C.

Performance of large-scale anode-supported solid oxide fuel cells with impregnated La 0.6Sr 0.4Co 0.2Fe 0.8O 3− δ+Y 2O 3 stabilized ZrO 2 composite cathodes

Anode-supported planar solid oxide fuel cells (SOFCs) with an active area of 81 cm 2 (9 cm × 9 cm) and nano-structured La 0.6Sr 0.4Co 0.2Fe 0.8O 3− δ + Y 2O 3 stabilized ZrO 2 (LSCF + YSZ) composite cathodes are successfully fabricated by tape casting, screen printing, co-firing and solution impregnation, and tested using H 2 fuel and air oxidant at various flow rates. Maximum power densities of 437 and 473 mW cm −2 are achieved at 750 °C by loading 0.6 and 1.3 mg cm −2 of LSCF in the composite cathodes, respectively. The gas flow rates, particularly the air, have a significant effect on the cell performance. Cell performance degradation with time is also observed, which is considered to be associated with the growth and coalescence of the nanosized LSCF particles in the composite cathode. The use of the LSCF cathode in combination with YSZ electrolyte without a Gd-doped CeO 2 (GDC) buffer layer is proved to be applicable in large cells, even though the thermal stability of the nanosized LSCF needs to be further improved.

La 0.6Sr 0.4Co 0.2Fe 0.8O 3− δ cathodes infiltrated with samarium-doped cerium oxide for solid oxide fuel cells

Porous La 0.6Sr 0.4Co 0.2Fe 0.8O 3− δ (LSCF) cathodes are coated with a thin film of Sm 0.2Ce 0.8O 1.95− δ (SDC) using a one-step infiltration process. Examination of the microstructures reveals that small SDC particles are formed on the surface of LSCF grains with a relatively narrow size distribution. Impedance analysis indicates that the SDC infiltration has dramatically reduced the polarization of LSCF cathode, reaching interfacial resistances of 0.074 and 0.44 Ω cm 2 at 750 °C and 650 °C, respectively, which are about half of those for LSCF cathode without infiltration of SDC. The activation energies of the SDC infiltrated LSCF cathodes are in the range of 1.42–1.55 eV, slightly lower than those for a blank LSCF cathode. The SDC infiltrated LSCF cathodes have also shown improved stability under typical SOFC operating conditions, suggesting that SDC infiltration improves not only power output but also performance stability and operational life.

The Rheology of Stabilised Lanthanum Strontium Cobaltite Ferrite Nanopowders in Organic Medium Applicable as Screen Printed SOFC Cathode Layers

AbstractThe production and optimisation of screen printing (SP) pastes containing La0.58Sr0.42Co0.21Fe0.79O3 – δ and La0.61Sr0.41Co0.19Fe0.79O3 – δ (LSCF) were investigated. The application of these nanopowders is supposed to improve the cathode's microstructure and increase its mechanical strength. Thirty seven pastes containing LSCF were carried out with variation in binders, dispersants and different particle size distribution. The rheological behaviour of these pastes was investigated. It was found that commercially available dispersant Solsperse 3000 resulted in the best suspension stability, achieving almost 55 times lower viscosity value for pastes containing 20 vol.‐%, than pastes without any dispersants. The shear thinning behaviour was found to be favourable for the LSCF cathode deposition. A cathode made from the mixture of nano and submicron powder exhibits a polarisation resistance as low as 0.76 Ω cm2 at 592 °C.

Electrophoretic Codeposition of La0.6Sr0.4Co0.8Fe0.2O3−δ and Carbon Nanotubes for Developing Composite Cathodes for Intermediate Temperature Solid Oxide Fuel Cells

Carbon nanotubes (CNTs)/La0.6Sr0.4Co0.8Fe0.2O3−δ (LSCF) composite films have been fabricated by electrophoretic codeposition on Ce0.9Gd0.1O1.95 (CGO) substrates. CNTs are used as a sacrificial phase to produce ordered porous LSCF cathodes for intermediate temperature solid oxide fuel cells. The synthesis of LSCF powder by a modified sol–gel route is presented. The possible mechanism of formation of CNT/LSCF composite nanoparticles in suspension is discussed. Moreover the optimal suspension composition and the conditions for achieving successful electrophoretic deposition (EPD) of CNTs/LSCF composite nanoparticles were evaluated. Experimental results showed that the CNTs were homogeneously distributed and mixed with LSCF nanoparticles forming a mesh‐like structure, which resulted in a highly porous LSCF film when the CNTs were burned out during heat treatment in air at 800°C for 2 h. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X‐ray diffraction (XRD) techniques were employed to characterize the microstructure of the precursors and of the composite films.

Stack Degradation in Dependence of Operation Parameters; the Real‐SOFC Sensitivity Analysis

AbstractThe EU Integrated Project Real‐SOFC aims at improving the understanding of degradation in SOFC stacks, and extending the durability of planar SOFC stacks to degradation rates suitable for stationary application. As part of the Real‐SOFC project, three series of SOFC stacks, each with two or four planar anode‐supported cells, were operated for durations of 3,000 h up to 10,000 h under varying fuel and electrical load conditions. The durability tests on these short stacks were conducted galvanostatically at 800 and 700 °C in dependence of current‐density (0.3, 0.5 or 0.7 A cm–2), of fuel composition (hydrogen: H2 + 3–10% H2O or methane: CH4/H2O (S/C = 2)) and of fuel utilisation (8, 40, 60 or 75%). A pronounced difference in degradation behaviour was observed between the stacks operated at different current densities. The degradation behaviour was, however, not influenced by the choice of fuel (hydrogen or methane) and was hardly influenced by the fuel utilisation. Lowest degradation rates of about 20 mΩ cm2 kh–1 were determined for the tests of a short stack with cells with LSM cathodes operated at 800 °C and a current‐density of 0.3 A cm–2 and of a short stack with cells with LSCF cathodes operated at 700 °C and a current‐density of 0.5 A cm–2. Post‐test characterisation of the cathode with respect to chromium poisoning was performed on cells from several stacks. No clear relationship between the degradation rate of the stacks and amount of Cr incorporated in the cathode could be established. The major difference was a change in microstructure of the cathode in the region near the electrolyte interface; in the stacks operated at lower current densities, the structurally changed zone was clearly thinner than in those stacks operated at higher currents.

Modifying the cathodes of intermediate-temperature solid oxide fuel cells with a Ce 0.8Sm 0.2O 2 sol–gel coating

To increase the performance of solid oxide fuel cells operated at intermediate temperatures (<700 °C), we used the electronic conductor La 0.8Sr 0.2MnO 3 (LSM) and the mixed conductor La 0.6Sr 0.4Co 0.2Fe 0.8O 3 (LSCF) to modify the cathode in the electrode microstructure. For both cathode materials, we employed a Sm 0.2Ce 0.8O 2 (SDC) buffer layer as a diffusion barrier on the yttria-stabilized zirconia (YSZ) electrolyte to prevent the interlayer formation of SrZrO 3 and La 2Zr 2O 7, which have a poor ionic conductivity. These interfacial reaction products were formed only minimally at the electrolyte–cathode interlayer after sintering the SDC layer at high temperature; in addition, the degree of cathode polarization also decreased. Moreover to extend the triple phase boundary and improve cell performance at intermediate temperatures, we used sol–gel methods to coat an SDC layer on the cathode pore walls. The cathode resistance of the LSCF cathode cell featuring SDC modification reached as low as 0.11 Ω cm 2 in air when measured at 700 °C. The maximum power densities of the cells featuring the modified LSCF and LSM cathodes were 369 and 271 mW/cm 2, respectively, when using O 2 as the oxidant and H 2 as the fuel.

Improving Stochiometery and Processing of LSCF Oxygen Electrode for SOFC

La1-xSrxCo0.2Fe0.8O3-δ deposits were developed for oxygen electrode for SOFC using powders of different stochiometery. The manufacturing of functional layer was carried our by atmospheric plasma spraying (APS) using TriplexPro gun. The processing was improved to obtain microstructure exhibiting high gas permeability and no degradation of the powders while attaining high production rates. Dwell time of the particles in the plasma was the established as the critical factor for the degradation and permeability. The improved functional coatings had a porosity of about 20 vol%. The CTE in air flow at 800{degree sign}C was, however, 15.6 x10-6 K-1. Electrochemical tests on SOFC cells having cathodes of different stochiometery with improved processing were conducted. These cells were produced using metal supported design, had YSZ as electrolyte and NiO+YSZ as anode. No interlayer (such as CGO) between YSZ and LSCF cathode was introduced. At 800{degree sign}C, power densities of above 640 mW/cm² at 0.7 V were recorded with H2/air for cell having La0.60Sr0.40Co0.2Fe0.8O3-δ as cathode. Cells consisting of La0.58Sr0.4Co0.2Fe0.8O3-δ and La0.78Sr0.2Co0.2Fe0.8O3-δ had 479 and 496 mW/cm² under similar conditions. Using equivalent circuit diagrams the contribution of different polarizations on the cell performance were separated and cathodes were compared. La0.60Sr0.40Co0.2Fe0.8O3-δ was found to have best electrochemical performance followed by La0.58Sr0.40Co0.2Fe0.8O3-δ and La0.78Sr0.20Co0.2Fe0.8O3-δ.

A Flexible Solid Oxide Fuel Cell Supported on the Thin Porous Metal

Metal-supported SOFCs are very attractive due to their high mechanical strength, thermal conductivity, and low material cost. These properties make SOFCs suitable for mobile application as well as the traditional stationary application. Contrary to many researches, using the thin-metal support will be more suitable for potable application because it provides the cell with flexibility, light weight, and good stacking property. In this study, thin metal-supported SOFC (~100μm) was fabricated and tested. Green sheets of thin STS support, Ni-YSZ anode, and YSZ electrolyte were prepared by tape casting method in order to fabricate the single cell. Three tapes were laminated and co-fired at 1300oC in reducing atmosphere. Microstructure of 3-layered cell was examined and the performance was tested with a LSCF cathode at 800oC. Thin and strong metal-supported SOFC was successfully fabricated by co-firing process. Total thickness of the sintered cell was ~80μm. This thin cell showed flexible nature and was easily bent without visible cracks on the electrolyte. The Cr-poisoning of Ni in the anode was occurred during sintering at high temperature, which could lower the cell performance. Cr diffusion barrier may be used in order to enhance the cell performance.