An ionic conductor Ce0.8Sm0.2O2?? (SDC) and semiconductor Sm0.5Sr0.5CoO3 (SSC) composite for high performance electrolyte-free fuel cell
By Deng, Hui; Zhang, Wei; Wang, Xunyin; Mi, Youquan; Dong, Wenjin; Tan, Wenyi; Zhu, Bin
Published in International Journal of Hydrogen Energy
NULL
2017
Abstract
Abstract An advanced electrolyte-free fuel cell (EFFC) was developed. In the EFFC, a composite layer made from a mixture of ionic conductor (Ce0.8Sm0.2O2??, SDC) and semiconductor (Sm0.5Sr0.5CoO3, SSC) was adopted to replace the electrolyte layer. The crystal structure, morphology and electrical properties of the composite were characterized by X-ray diffraction analysis (XRD), scanning electron microscope (SEM), and electrochemical impedance spectrum (EIS). Various ratios of {SDC} to {SSC} in the composite were modulated to achieve balanced ionic and electronic conductivities and good fuel cell performances. Fuel cell with an optimum ratio of 3SDC:2SSC (wt.%) reached the maximum power density of 741 mW cm?2 at 550
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