Abstract
In this study we report on the development and operational data of a metal-supported solid oxide fuel cell with a thin film electrolyte under varying conditions. The metal-ceramic structure was developed for a mobile auxiliary power unit and offers power densities of 1 W/cm2 at 800 °C, as well as robustness under mechanical, thermal and chemical stresses. A dense and thin yttria-doped zirconia layer was applied to a nanoporous nickel/zirconia anode using a scalable adapted gas-flow sputter process, which allowed the homogeneous coating of areas up to 100 cm2. The cell performance is presented for single cells and for stack operation, both in lightweight and stationary stack designs. The results from short-term operation indicate that this cell technology may be a very suitable alternative for mobile applications.
Highlights
Materials science and engineering has been a major contributor to the progress of fuel cell technology [1]
A metal-supported solid oxide fuel cells (SOFCs) based on a porous steel substrate, a graded three-layer Ni/8YSZ
Anode, and a thin film 8YSZ membrane was operated in two different stack designs
Summary
Materials science and engineering has been a major contributor to the progress of fuel cell technology [1]. The advancement of oxide ion electrolytes and the introduction of potent mixed ionic and electronic conducting (MIEC) electrodes has enabled a reduction in operating temperatures [4,5,6]. This made it possible to incorporate metallic interconnects into the cell design at substantially lower costs than for their ceramic counterparts [7,8]. Production costs for conventional ceramic SOFCs and limited mechanical robustness remain limiting factors
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