Anode Fluidization of a Liquid Tin Anode SOFC Operated on Simulated Syngas

Abstract

Liquid tin has been widely employed as anodes in SOFCs to digest carbonaceous fuels. Liquid tin anode SOFCs fed on methane, kerosene, and carbon black have been successfully constructed and operated. However, the formation of a SnO 2 blocking film at electrochemical reactive sites hinders further electrochemical reaction and impedes steady power generation of the fuel cell system. Here we manage to suppress the formation of isolating SnO 2 film by anode fluidization. Tubular liquid tin anode SOFC has been fabricated and tested in present work. Fuels (H 2 and simulated syngas with different H 2 /CO ratio) are supplied to the electrochemical reactive interface between the anode and the electrolyte via a manner of bubbling bed. H 2 was found to effectively reduce SnO 2 formed when the SOFC was discharged at a constant potential of 0.45V, and anode fluidization has doubled the fuel cell’s power output. We anticipate that anode fluidization in this study will principally simplify the configuration of liquid tin anode SOFC and maintain the stable operation of the fuel cell system. Figure 1

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Identifiers

DOI

10.1149/ma2017-03/1/371

Journal

ECS Meeting Abstracts

Year

2017