Abstract
In this work, a porous nickel anode for thin-film solid oxide fuel cell prepared by the simple powder hot-pressing method is investigated. Powders of Ni and pore-forming agent (PFA) were thoroughly mixed in different ratios, pressed in a mold and further sintered. The polishing technique with Yttria-Stabilized Zirconia (YSZ) powder has been developed to decrease the surface roughness of Ni-based anode in order to deposit a crack-free electrolyte layer. The 3 μm YSZ thin-film electrolyte was deposited by the pulsed laser deposition technique on the surface of the anode. Morphological and elemental analyses of the samples were characterized by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analyses. X-ray diffraction was used for phase analysis and structural characterization. The specific surface areas of the resulting anodes were calculated from their isotherms of N2 adsorption and desorption using the Sorbtometer and calculated by Brunauer Emmett-Teller (BET) method. As a result, the highest mechanical strength and specific surface area (15.42 m2g-1) possessed a sample with the content of PFA equal to 40%, while its ionic conductivity at 800 °C reached 6. 4∙10-2 S/cm.
Highlights
The rapid pace of world economic development has a negative impact on the environment due to the fact that fossil fuels are the main source of energy in the world [1], and it is estimated as 80% [2]
The current study is focused on the fabrication of half-cell Solid oxide fuel cells (SOFCs) with the highly porous structure of Ni anode with yttria stabilized zirconia (YSZ) particles between the anode and electrolyte layer deposited by pulsed laser deposition technique (PLD)
The smooth anode surface allowed depositing a homogeneous layer of Yttria-Stabilized Zirconia (YSZ) electrolyte with a thickness of ~ 3 μm, which effectively prevents the traveling of hydrogen to the cathode part of the SOFC
Summary
The rapid pace of world economic development has a negative impact on the environment due to the fact that fossil fuels are the main source of energy in the world [1], and it is estimated as 80% [2]. The step of reducing the size of electrolytes is the main solution for lowering the operating temperature of SOFCs. in traditional SOFC systems, a significant reduction of the electrolyte layer can critically affect the fuel cell due to the strength characteristics, since the electrolyte acts as a supporting element of the entire cell [21, 22]. In traditional SOFC systems, a significant reduction of the electrolyte layer can critically affect the fuel cell due to the strength characteristics, since the electrolyte acts as a supporting element of the entire cell [21, 22] In this regard, the current study is focused on the fabrication of half-cell SOFC with the highly porous structure of Ni anode with yttria stabilized zirconia (YSZ) particles between the anode and electrolyte layer deposited by pulsed laser deposition technique (PLD)
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