کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1276110 | 1497545 | 2012 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Characterization of nanosized Ce0.8Sm0.2O1.9-infiltrated Sm0.5Sr0.5Co0.8Cu0.2O3−δ cathodes for solid oxide fuel cells Characterization of nanosized Ce0.8Sm0.2O1.9-infiltrated Sm0.5Sr0.5Co0.8Cu0.2O3−δ cathodes for solid oxide fuel cells](/preview/png/1276110.png)
This study investigates the microstructure and electrochemical properties of Sm0.5Sr0.5Co0.8Cu0.2O3−δ (SSC-Cu) cathode infiltrated with Ce0.8Sm0.2O1.9 (SDC). The newly formed nanosized electrolyte material on the cathode surface, leading the increase in electrochemical performances is mainly attributed to the creation of electrolyte/cathode phase boundaries, which considerably increases the electrochemical sites for oxygen reduction reaction. Based on the experiment results, the 0.4 M SDC infiltration reveals the lowest cathode polarization resistance (RP), the cathode polarization resistances (Rp) are 0.117, 0.033, and 0.011 Ω cm2 at 650, 750, and 850 °C, and the highest peak power density, are 439, 659, and 532 mW cm−2 at 600, 700, and 800 °C, respectively. The cathode performance in SOFCs can be significantly improved by infiltrating nanoparticles of SDC into an SSC-Cu porous backbone. This study reveals that the infiltration approach may apply in SOFCs to improve their electrochemical properties.
► The SDC-infiltrated SSC-Cu cathode with numerous sites for oxygen reduction reaction.
► The dramatic decrease in cathode polarization resistance for SDC-infiltrated SSC-Cu cathode was mainly attributed to the creation of SDC/SSC-Cu phase boundaries.
► The newly formed SDC on the SSC-Cu surface with highly porous would allow gas-phase molecules to easily diffuse.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 24, December 2012, Pages 19027–19035