Benefiting from a strong cooperation with Forschungszentrum Jülich, Karlsruhe Institute of Technology (KIT), and AVL List GmbH respectively, Plansee has been focusing on the development and industrialization of metal-supported SOFC and components for mobile applications. In the scope of some challenging development projects a novel MSC configuration and a first pilot fabrication route could be demonstrated successfully. Currently, the work is ongoing towards a continuous and reliable manufacturing of standard cells as well as the demonstration of system-relevant stack tests. This paper gives an overview about the latest results in cell and stack development as well as about the manufacturing route for cost-effective metal-supported cells.
A novel generation of a thin-film, metal supported solid oxide fuel cell (MSC) has been developed and demonstrated in the scope of the NextGen MSC project (funded by the German Federal Ministry of Economics and Technology) by Plansee, Forschungszentrum Jülich (FZ-J), and the Karlsruhe Institute of Technology (KIT), respectively. In the scope of this work, due to consequent electrolyte and electrode development, a novel cell configuration, based on Plansee's well-known porous FeCr alloy as mechanical cell support, could be established. Thus, first cell measurements at KIT indicate the feasibility and the reliability of the established cell manufacturing process. The tested cell has shown a current density of 1.52 A/cm² at 0.7 V and 820°C. This corresponds with an area specific cell performance of 1,064 mW/cm 2 . Furthermore, during a cell operation time of approx. 300 h, the cell degradation was relatively low.
To demonstrate the performance and reliability of MSCs (Metal Supported SOFCs), a systematic electrochemical characterization on button cells has been performed. The cell conditioning during the first heating-up is described in detail, since there is a significant difference to ESCs (Electrolyte Supported Cell) and ASCs (Anode Supported Cell). The focus of the present work is to show the influence of different anode materials, gas-flow rates, and operation temperatures on recorded i-V-curves. In some cases, fuel utilization rates were used, which are higher than commonly applied in button cell experiments. However, under these harsh conditions, the anode and the metal substrate must handle e.g. high humidity. This paper summarizes recent results on (i) manufacturing, (ii) appropriate test procedures, (iii) electrochemical testing, and (iv) influence of different anode layer materials for MSCs.
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