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Brisbane, Australia

Ceramic Fuel Cells Ltd is an Australian fuel cell technology company, based in Melbourne. The company produces the "BlueGen" gas-to-electricity generators. CFCL's develops solid oxide fuel cell technology to provide reliable, energy efficient, high quality, and low-emission electricity from natural gas and renewable fuels. CFCL is developing SOFC products for small-scale on-site micro combined heat and power and distributed generation units that co-generate electricity and heat for domestic use. Wikipedia.

Zhao L.,Curtin University Australia | Drennan J.,University of Queensland | Kong C.,University of New South Wales | Amarasinghe S.,Ceramic Fuel Cells Ltd. | Jiang S.P.,Curtin University Australia
Journal of Materials Chemistry A | Year: 2014

La0.6Sr0.4Co0.2Fe0.8O 3-δ, (LSCF) perovskite oxide is one of the most important cathode materials in the development of intermediate temperature solid oxide fuel cells (IT-SOFCs), but vulnerable to chromium deposition and poisoning in the presence of gaseous chromium species from the chromia-forming metallic interconnect. Despite extensive studies on Cr deposition on SOFC cathode materials, there is a lack of direct evidence on the surface chemistry and Cr deposition. Here, the fundamental relationship between the surface segregation and Cr deposition of LSCF cathodes is studied on dense LSCF bar samples using a dual beam high resolution focused ion beam (FIB) and a high resolution scanning electron microscope coupled with EDS. FIB-EDS mapping results clearly indicate the segregation of SrO and Co3O4 particles on the LSCF surface after annealing at 800 °C for 96 h. Cr deposition occurs preferentially on the segregated SrO but not on Co3O4. The fundamental reason for the selective and preferential Cr deposition on the segregated SrO is the exclusion effect of the presence of SrO on the reactivity between gaseous Cr species and segregated Co3O4, inhibiting the Cr deposition on the segregated Co3O4 particles. © 2014 the Partner Organisations.

Chen K.,Curtin University Australia | Ai N.,Curtin University Australia | Lievens C.,Curtin University Australia | Love J.,Ceramic Fuel Cells Ltd. | Jiang S.P.,Curtin University Australia
Electrochemistry Communications | Year: 2012

The impact of volatile boron species on the microstructure and performance of nano-structured (Gd,Ce)O 2-infiltrated (La,Sr)MnO 3 (GDC-LSM) cathodes of solid oxide fuel cells is studied for the first time. The results indicate that after the heat treatment of the cathodes at 800 °C in air for 30 days in the presence of borosilicate glass significant grain growth and agglomeration of infiltrated GDC nanoparticles are observed. The electrode polarization resistance of the GDC-LSM cathode after the heat treatment in the presence of glass is 3.15 Ω cm 2 at 800 °C, substantially higher than 0.17 Ω cm 2 of the cathode heat-treated in the absence of glass under identical conditions. ICP-OES analysis shows the deposition of boron species in the cathodes after sintering in the presence of glass powder. The results demonstrate the significant detrimental effect of volatile boron species on the microstructure and activity of nano-structured GDC-LSM cathode. © 2012 Elsevier B.V. All rights reserved.

Zhao L.,Curtin University Australia | Hyodo J.,Kyushu University | Chen K.,Curtin University Australia | Ai N.,Curtin University Australia | And 3 more authors.
Journal of the Electrochemical Society | Year: 2013

The relationship between the surface segregation, boron poisoning and surface exchange coefficients of La0.6Sr0.4Co 0.2Fe0.8O3-δ,(LSCF) cathodes of solid oxide fuel cells (SOFCs) is studied on dense bar samples using SEM, SIMS and conductivity relaxationmethod. The SEM results clearly indicate that the segregation on the LSCF surface occurs after heat-treatment at 700-800°C for 48 h,forming isolated particles on the LSCF surface. The presence of volatile boron species accelerates grain growth of the segregated.particles and reacts with LSCF. The depth of boron reaction layer after heat-treatment in the presence of E-glass at 700°C, 750°C and 800°C for 48 h was 2, 5 and 40 nm, respectively. The depth profiles analysis of SIMS indicates that there is segregation and enrichment of constituent elements of LSCF on the electrode surface, in line with the depth profile of boron species on the LSCF sample surface layer. Boron deposition and poisoning deteriorates the surface exchange and diffusion processes for the oxygen reduction reaction on LSCF. After exposed to boron at 800°C for 48 h, the surface exchange coefficient, Kchem is 6.0 × 10-5 cm s-1, more than one magnitude lower than 1.1 × 10-3 cm s-1 of as-prepared LSCF samples. © 2013 The Electrochemical Society. All rights reserved.

Hosseini S.,Curtin University Australia | Ahmed K.,Ceramic Fuel Cells Ltd. | Tade M.O.,Curtin University Australia
Journal of Power Sources | Year: 2013

A fully coupled CFD model of a direct internal reforming single cell SOFC stack previously designed by Ceramic Fuel Cell Ltd (CFCL) has been developed. In this model, an innovative solution technique for accelerating finite volume treatment of the electrodes as two distinct layers, a diffusion layer and a catalyst layer, is taken to analyse the combined effects of the macro/microstructural parameters on distribution of fields and each of the reactions involved in the process. To assess the simulation results, the model is not only evaluated with the CFCL experimental data that was reported from the similar geometry, but it is also assessed for the effects of the reforming and water gas shift reactions. It is found that a 3D model is more representative of the global reforming reaction rate. Furthermore, distributions of the key parameters along different spatial domains disclose the complex interaction between the anode flow field design and microstructural parameters of the anode diffusion layer. In fact, an optimal set of the anode microstructure that promotes the reforming reaction rate will not automatically result in improved SOFC performance. The developed model is a powerful tool to study complex fuel cell related problems and to optimize fuel cells' structure. Crown Copyright © 2013 Published by Elsevier B.V. All rights reserved.

Ceramic Fuel Cells Ltd. | Date: 2011-04-15

A fuel cell stack comprising multiple arrays of one or more fuel cells, each comprising an electrolyte layer, an anode layer and a cathode layer; gas separator plates between adjacent fuel cells; and oxidant gas distribution passages and fuel gas distribution passages between adjacent fuel cells; and gas separators opening to the cathode layers and the anode layers, respectively, of the fuel cells. The fuel cell arrays comprise at least first stage fuel cell arrays having associated first fuel gas distribution passages to receive fuel gas from one or more fuel gas supply manifolds and second stage fuel cell arrays having associated second fuel gas distribution passages which receive fuel exhaust from the fuel cells of the first stage fuel cell arrays. The second stage fuel cell arrays are interleaved in the stack between first stage fuel cell arrays to improve thermal gradients. Other interleaving arrangements are possible.

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