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Investigation of Gas Diffusion Layer Effects on the Freeze/Thaw Condition Durability in PEFCs  

Lim, Soo-Jin (Fuel Cell Research Center, Korea Institute of Energy Research)
Park, Gu-Gon (Fuel Cell Research Center, Korea Institute of Energy Research)
Park, Jin-Soo (Fuel Cell Research Center, Korea Institute of Energy Research)
Sohn, Young-Jun (Fuel Cell Research Center, Korea Institute of Energy Research)
Yim, Sung-Dae (Fuel Cell Research Center, Korea Institute of Energy Research)
Yang, Tae-Hyun (Fuel Cell Research Center, Korea Institute of Energy Research)
Kim, Chang-Soo (Fuel Cell Research Center, Korea Institute of Energy Research)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.20, no.4, 2009 , pp. 309-316 More about this Journal
Abstract
The effect of gas diffusion layers (GDLs) on the freeze/thaw condition durability in polymer electrolyte fuel cells (PEFCs) were investigated. For this purpose, three kinds of GDLs, such as, felt, paper and cloth types with different basic properties have been first prepared, then the changes in the properties and performance of cells was observed during the freeze/thaw cycles ranging from -30 to $70^{\circ}C$. The performance evaluations were conducted by using the single cells consisting of different GDLs. The performance degradation and the cell resistance increase could be directly correlated. The physical destruction of electrode was shown by SEM analysis. The mechanically supporting ability on the interface between the cell components can help enhancing the durability of PEFCs in the freeze/thaw condition.
Keywords
PEFC; Water management; Freeze/thaw; Durability; Bending stiffness;
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