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Compressive stress and its impact on the gas diffusion layer: A review

期刊

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 6, 页码 3994-4009

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.10.058

关键词

Fuel cell; Gas diffusion layer; Stress; Compression

资金

  1. National Key Research and Development Program of China [2018YFB1502500]

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This paper reviews the effects of compression on gas diffusion layers in fuel cells, emphasizing the need for comprehensive investigation on how compression affects the pores and bulk characteristics of the gas diffusion layer.
The gas diffusion layer is subjected to several mechanical stresses during the manufacturing and application processes of fuel cell. The deformation of gas diffusion layer under compression affects the mass transfer and electron migration between the flow channel and reaction area. This paper mainly reviews the published research on stress distribution of the gas diffusion layer, the effects of compressive stress on the bulk and pore characteristics of the gas diffusion layer, and the performance of fuel cell. Furthermore, the relationship between stress and strain of the gas diffusion layer is summarized. The impacts of compression on the gas diffusion layer present the characteristics of multi-parameters, non-linearly, small variation and strong coupling. This review suggests that the compression affects the pore and bulk characteristics of gas diffusion layer should be comprehensively investigated.

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