Effects of anisotropic bending stiffness of gas diffusion layer on the MEA degradation of polymer electrolyte membrane fuel cells by wet/dry gas

The effects of anisotropic bending stiffness of a gas diffusion layer (GDL) on membrane electrode assembly (MEA) degradation were investigated. We prepared GDLs with a fiber direction perpendicular to the major flow (i.e., “90° GDL”) and with a fiber direction parallel to the major flow (i.e., “0° G...

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Bibliographic Details
Published in:International journal of hydrogen energy 2013-12, Vol.38 (36), p.16245-16252
Main Authors: Seo, Jeong Hoon, Baik, Kyung Don, Kim, Dong Kyu, Kim, Seonyeob, Choi, Jong Won, Kim, Mansu, Song, Han Ho, Kim, Min Soo
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Anisotropy
Applied sciences
Energy
Exact sciences and technology
Fuels
GDL anisotropy
Hydrogen
Mechanical degradation
Polymer electrolyte membrane fuel cell
Wet/dry cycles
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Summary:The effects of anisotropic bending stiffness of a gas diffusion layer (GDL) on membrane electrode assembly (MEA) degradation were investigated. We prepared GDLs with a fiber direction perpendicular to the major flow (i.e., “90° GDL”) and with a fiber direction parallel to the major flow (i.e., “0° GDL”). To analyze the mechanical durability as a function of GDL anisotropy, we examined cell performances such as the I–V characteristics and impedances and the hydrogen crossover characteristics during wet/dry cycles. The results showed that the 90° GDL fuel cell is superior to the 0° GDL fuel cell in terms of higher I–V performance, lower resistance at high frequency, and lower hydrogen crossover through the MEA. Mechanical degradation of the 0° GDL was investigated using scanning electron microscopy (SEM).
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2013.09.043