Novel, cobalt-free, and highly active Sr2Fe1.5Mo0.5?xSnxO6?? cathode materials for intermediate temperature solid oxide fuel cells
By He, Beibei; Gong, Cheng; Wang, Zhenbin; Jia, Lichao; Zhao, Ling
Published in International Journal of Hydrogen Energy
NULL
2017
Abstract
Abstract One of the technical hurdles to commercialization of intermediate temperature solid oxide fuel cells (IT-SOFCs) is the requirement of highly efficient cathode materials. Herein, we report the evaluation of Sr2Fe1.5Mo0.5?xSnxO6?? (x = 0, 0.1, 0.3 and 0.5, abbreviated as SFM, SFMS1, SFMS3, and SFS) oxides as cobalt-free cathode materials of IT-SOFCs. {XPS} analysis demonstrates the presence of variable valences among Fe, Mo and Sn elements, suggesting a small polaron hopping mechanism for electronic conduction. First principle calculations reveal that {SFMS3} provides the lowest average formation energy of oxygen vacancy (EvacO*) among these perovskites. The relatively low area specific resistances are obtained with {SFMS3} electrode based on La0.8Sr0.2Ga0.8Mg0.2O3?? electrolytes, indicating its high activity for oxygen reduction reaction. Power density of the single cell using {SFMS3} cathode as high as 618 mW cm?2 at 800
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.