Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5145939 | International Journal of Hydrogen Energy | 2017 | 7 Pages |
Abstract
An advanced electrolyte-free fuel cell (EFFC) was developed. In the EFFC, a composite layer made from a mixture of ionic conductor (Ce0.8Sm0.2O2âδ, 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 cmâ2 at 550 °C. The results have illuminated that the SDC-SCC layer, similar to a conventional cathode, can replace the electrolyte to make the EFFC functions when the ionic and electronic conductivities were balanced.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Hui Deng, Wei Zhang, Xunyin Wang, Youquan Mi, Wenjin Dong, Wenyi Tan, Bin Zhu,