Impact on Fuel Transport Efficiency in Anode of Planar Solid Oxide Fuel Cells

摘要

This work establishes a mathematical model of fuel transport efficiency in anode that permeates fromthe surface to the triple phase boundaries through the porous electrode of solid oxide fuel cells. Andthe relationship between the fuel transport efficiency and the parameters of the porous anode and gaschannel is verified with the reported experimental results. The result shows that the fuel transportefficiency in anode is proportional to the porosity of the supported-anode and the length of the gaschannel on interconnects. The fuel transport efficiency is also inversely proportional to the porosityand height of the gas channel on interconnect and the thickness of the porous supported-anode. Whenthe porosity of the supported- anode is fixed, the fuel transport efficiency can be improved by reducingthe porosity or extending the gas channel length, or reducing the gas channel height on theinterconnect, or reducing the thickness of the porous-anode. When the porosity, height, and length ofthe gas channel on the interconnect are fixed, the fuel transport efficiency in anode can be improved byincreasing the porosity or reducing the thickness of the porous anode.