Microfabrication of thin film SOFC with 3D microperiodic porous electrodes
- Microfabrication of thin film SOFC with 3D microperiodic porous electrodes
- 최선희; 황철성; 이종호; 이해원; 김주선; 손지원; 김혜령
- sputtering; YSZ thin film; solid oxide fuel cell; 3D microperiodic; polystyrene
- Issue Date
- 214th ECS (The Electrochemical Society) Meeting
- Recently, several new electrode architectures have been developed in order to create effective and durable electrode structures for low temperature SOFCs. Among these electrodes, 3D microperiodic porous mixed ionic/electronic conductors (MIECs) are most attractive for SOFC and catalysis. The degree of extension of the active electrochemical reaction sites depends on the rate of defect transport through the solid MIEC, the rate of gas transport through the pores, and the catalytic activity of the interfaces. To date, the porosity of electrodes is controlled via the use of pore formers, and 3D arrangements can be obtained using close packed arrays of polystyrene monodisperse spheres as template.
Several mixed oxides, i.e. doped zirconia, NiO-YSZ composite, and LSM-YSZ composite have been prepared and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption and mercury porosimetry. The electrochemical tests have been performed by impedance spectra and electrode/electrolyte interfacial polarization resistance.
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