The cell was sealed into the rig by silver paste, and the test rig was heated in a programmable horizontal tubular furnace. Both I-V and electric power data have been recorded by changing the external load to the cell (0 to 2 KΩ) at fixed temperatures of 450°C, 520°C, and 550°C, at a fixed hydrogen flow. Figure 6 shows the performance of samples selleck screening library etched using wet
and electrochemical etching. Both samples showed increases in the open circuit voltages, closed circuit current, and power density with increasing operating temperature. The sample with linked nickel islands exhibited higher closed circuit current and higher power density than the sample with clean pores. This can be related to the larger surface of contact between the Ni anode, the YSZ electrolyte, and the fuel, the triple-phase boundary which increases the oxidation process of the hydrogen at the anode and results in the release of more electrons selleck compound producing higher current and thus GS-7977 price higher power density. The areal power density of the device is lower than that of thick solid
oxide fuel cells; however, due to the extreme thinness of the device, the volume power density can be much greater than thick solid oxide fuel cells, and the temperature of operation is much lower. Figure 5 Schematic diagram for thin SOFC fuel-air test system. Figure 6 Performance of samples etched using wet and electrochemical etching. Performance of thin SOFC with anode clear holes (sample S1) and nickel islands (sample S2) as a function of operating temperature tested in terms of (a) current vs voltage and (b) current vs produced power. Conclusions Thin film solid oxide fuel cells were fabricated on porous nickel foils using PLD. Micropore openings were etched into the nickel foils for hydrogen fuel flow by wet and electrochemical etching so as to allow them to act as anodes. The electrochemical etching process showed incomplete etching leaving nickel islands
linked to the pore frames. These islands lead to more surface area of contact between the nickel, fuel, and electrolyte – enhancement of the triple-phase boundary. The sample with the greater triple-phase boundary surface exhibits better performance and higher output power. Authors’ information Dr. RE is a senior research Montelukast Sodium scientist at the Center for Advanced Materials and the Physics Department at the University of Houston. His research is focused on advanced oxide materials and also involved in materials science in the energy arena where he has contributed to work on thin film solid oxide fuel cells and to safely store the hydrogen needed for fuel cells to operate. Mr. MY is a promising research assistant at the Kazakhstan Institute for Physics and Technology and also at the Center for Advanced Materials; during his Master work, he was focusing on the development of thin film solid oxide fuel cells. Dr.