Mixed ionic-electronic conductor membrane based fuel cells by incorporating semiconductor Ni0.8Co0.15Al0.05LiO2?? into the Ce0.8Sm0.2O2??-Na2CO3 electrolyte
By Zhang, Wei; Cai, Yixiao; Wang, Baoyuan; Xia, Chen; Dong, Wenjing; Li, Junjiao; Zhu, Bin
Published in International Journal of Hydrogen Energy
2016
Abstract
Abstract In the present study, a novel composite was fabricated by incorporating the semiconductor Ni0.8Co0.15Al0.05LiO2?? (NCAL) into the ionic electrolyte Ce0.8Sm0.2O2??-Na2CO3 (NSDC), and further developed as a mixed-conducting membrane for single layer fuel cell (SLFC) applications. Experimentally, the crystal structure, morphology, chemical composition and thermo-stability of the composite were characterized by XRD, {SEM} and TGA. The best cell performance was investigated when the NSDC-NCAL membrane was optimized at a weight ratio of 6:4. On this basis, a number of interesting findings were obtained: i) the mixed conducting membrane did not cause any short circuit; on the contrary, the cell reached a decent open circuit voltage (OCV) of ?1.0 V. ii) a high power density of 1072 mW cm?2 was achieved at 550