کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1296607 | 1498343 | 2010 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of Ni content on the microstructure and electrochemical properties of Ni–SDC anodes for IT-SOFC Effect of Ni content on the microstructure and electrochemical properties of Ni–SDC anodes for IT-SOFC](/preview/png/1296607.png)
Ni–SDC (samaria-doped ceria) films for an IT-SOFC anode were fabricated by a slurry spin coating method. The microstructure and electrochemical performances of the Ni–SDC anodes were investigated with respect to the Ni vol.%. The connectivity of Ni–Ni grains, SDC–SDC grains and Ni–SDC grains, which is remarkably influenced by the Ni vol.%, is suggested to dominate the electrochemical behavior of the Ni–SDC anodes, including a hydrogen adsorption/diffusion process on the surface of Ni particles and a charge transfer process on the SDC electrolyte. A porous microstructure consisting of homogeneously distributed Ni and SDC phases together with well-connected grains was observed for the Ni–SDC anodes containing 50% and 60% volume content of Ni, which exhibited a polarization resistance around 0.1 Ω cm2 together with an overpotential around 30 mV under a current density of 200 mA cm− 2 at 800 °C in a 60%N2 + 40%H2 atmosphere.
Journal: Solid State Ionics - Volume 181, Issues 23–24, 4 August 2010, Pages 1119–1124