Compositing protonic conductor BaZr0.5Y0.5O3 (BZY) with triple conductor BaCo0.4Fe0.4Zr0.1Y0.1O3-? (BCFZY) as electrolyte for advanced solid oxide fuel cell
By He, Zili; Nie, Jingjing; Liu, Kai; Ganesh, K. Sivajee; Akbar, M.; Xia, Chen; Wang, Xunying; Dong, Wenjing; Huang, Jianbing; Wang, Baoyuan
Published in International Journal of Hydrogen Energy
International Journal of Hydrogen Energy
2020
Abstract
BaZr0.5Y0.5O3(BZY) electrolyte exhibited enormous potential for low temperature solid oxide fuel cell (SOFC) due to its proton dominant mobile carriers rather than oxygen ions during the electrochemical process. In order to enhance the ionic conductivity, triple conductor BaCo0.4Fe0.4Zr0.1Y0.1O3-? (BCFZY) was composited with proton conductor BZY to form semiconductor-ionic conductor composite (SIM), which was applied as electrolyte to fabricate symmetrical fuel cell. The microstructural and electrochemical properties for BZY, BCFZY and BZY-BCFZY composites were studied. After optimizing the weight ratio of composite content, the ionic conductivity and electronic conductivity reached an equilibrium state to obtain the maximum cell performance, namely the highest output of 902.5 mW cm?2 and an open circuit voltage (OCV) of 1.043 V at 550