Abstract
The performances of Intermediate Temperature Solid Oxide Fuel Cell (IT-SOFC) anode-supported planar cells with a 10 cm2 active surface were studied versus the combination of cathode thickness and the presence of an Anode Functional Layer (AFL). The temperature range was 500 to 650 °C, and Gd0.1Ce0.9O2−x (GDC) was used as the electrolyte material, Ni-GDC as the anode material, and La0.6Sr0.4Co0.2Fe0.8O3−d (LSCF48) as the cathode material. The power density, conductivity, and activation energy of different samples were determined in order to investigate the influence of the cathode thickness and AFL on the performance. These results showed an improvement in the performances when the AFL was not present. The maximum power density reached 370 mW·cm−2 at 650 °C for a sample with a cathode thickness of 50 µm and an electrolyte layer that was 20 µm thick. Moreover, it was highlighted that a thinner cathode layer reduced the power density of the cell.
Highlights
In recent years, there has been more need to develop Intermediate Temperature Solid Oxide FuelCells (IT-SOFCs), which work in the range 500–600 ◦ C, compared to the commonly used SOFCs which work in the range 700–1000 ◦ C [1]
An Open Circuit Voltage (OCV) of 920 mV at 500 °C was obtained, mesh and nickel felt as current collectors at the cathode and anode sides, respectively
Li heated at a heating rate of 150 K·h in H2 (1%)/N2 to 750 ◦ C and retained for 10 min, the reduction et al [16], the internal resistance of a SOFC
Summary
There has been more need to develop Intermediate Temperature Solid Oxide FuelCells (IT-SOFCs), which work in the range 500–600 ◦ C, compared to the commonly used SOFCs which work in the range 700–1000 ◦ C [1]. There has been more need to develop Intermediate Temperature Solid Oxide Fuel. A decrease in the SOFC operating temperature can lower the thermal stress on the SOFC stack and widen the types of materials used for structural components in the SOFC systems, which are supposed to provide a reduction in the operation costs and extension of the stack lifetime [2]. A reduction in operating temperature may be accompanied by a decrease in the electrochemical performance of each fuel cell system material [3]. The choice of the cell materials is restricted to those electrochemically active at the chosen temperature range. Lanthanum strontium cobalt iron oxide with the specific composition Gadolinium-doped ceria (Gd0.1 Ce0.9 O2−x : GDC) is a promising candidate for SOFC electrolyte at intermediate temperatures thanks to its high ionic conductivity [4], low activation energy, and chemical stability between the room temperature and its melting point.
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