Fractal permeability models for the microporous layer and gas diffusion layer of PEM fuel cell

Shih Kun Lo; Chung Jen Tseng; Li Duan Tsai; Jiunn Nan Lin

doi:10.1080/02533839.2011.552964

Fractal permeability models for the microporous layer and gas diffusion layer of PEM fuel cell

Shih Kun Lo, Chung Jen Tseng, Li Duan Tsai, Jiunn Nan Lin

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

In this investigation, a series fractal permeability model is developed to predict the gas permeability for the microporous layer (MPL) and gas diffusion layer of proton exchange membrane fuel cells. In addition to macroscopic flow, the model also considers gas molecules using the Adzumi equation. Parameters such as the maximum pore size, porosity, fractal area dimension and fractal tortuosity dimension, and the thickness of the sample are used to predict the permeability. From scanning electron microscopic images, the two fractal dimensions are determined by the box-counting method. This model is validated by comparison with experimental measurement results. Effects of compression pressure and MPL baking time are studied. Results show that the gas permeability decreases with increasing compression pressure. Longer MPL baking time increases gas permeability, and cell performance.

Original language	English
Pages (from-to)	39-47
Number of pages	9
Journal	Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an
Volume	34
Issue number	1
DOIs	https://doi.org/10.1080/02533839.2011.552964
State	Published - Jan 2011

Keywords

Fractal permeability
Gas diffusion layer
Microporous layer
PEM fuel cell

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title = "Fractal permeability models for the microporous layer and gas diffusion layer of PEM fuel cell",

abstract = "In this investigation, a series fractal permeability model is developed to predict the gas permeability for the microporous layer (MPL) and gas diffusion layer of proton exchange membrane fuel cells. In addition to macroscopic flow, the model also considers gas molecules using the Adzumi equation. Parameters such as the maximum pore size, porosity, fractal area dimension and fractal tortuosity dimension, and the thickness of the sample are used to predict the permeability. From scanning electron microscopic images, the two fractal dimensions are determined by the box-counting method. This model is validated by comparison with experimental measurement results. Effects of compression pressure and MPL baking time are studied. Results show that the gas permeability decreases with increasing compression pressure. Longer MPL baking time increases gas permeability, and cell performance.",

keywords = "Fractal permeability, Gas diffusion layer, Microporous layer, PEM fuel cell",

author = "Lo, {Shih Kun} and Tseng, {Chung Jen} and Tsai, {Li Duan} and Lin, {Jiunn Nan}",

note = "Funding Information: The authors would like to thank the National Science Council of Taiwan for the partial funding for this work through the Grant NSC96-2212-E008-027-MY2.",

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Fractal permeability models for the microporous layer and gas diffusion layer of PEM fuel cell. / Lo, Shih Kun; Tseng, Chung Jen; Tsai, Li Duan et al.
In: Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an, Vol. 34, No. 1, 01.2011, p. 39-47.

Research output: Contribution to journal › Article › peer-review

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T1 - Fractal permeability models for the microporous layer and gas diffusion layer of PEM fuel cell

AU - Lo, Shih Kun

AU - Tseng, Chung Jen

AU - Tsai, Li Duan

AU - Lin, Jiunn Nan

N1 - Funding Information: The authors would like to thank the National Science Council of Taiwan for the partial funding for this work through the Grant NSC96-2212-E008-027-MY2.

PY - 2011/1

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N2 - In this investigation, a series fractal permeability model is developed to predict the gas permeability for the microporous layer (MPL) and gas diffusion layer of proton exchange membrane fuel cells. In addition to macroscopic flow, the model also considers gas molecules using the Adzumi equation. Parameters such as the maximum pore size, porosity, fractal area dimension and fractal tortuosity dimension, and the thickness of the sample are used to predict the permeability. From scanning electron microscopic images, the two fractal dimensions are determined by the box-counting method. This model is validated by comparison with experimental measurement results. Effects of compression pressure and MPL baking time are studied. Results show that the gas permeability decreases with increasing compression pressure. Longer MPL baking time increases gas permeability, and cell performance.

AB - In this investigation, a series fractal permeability model is developed to predict the gas permeability for the microporous layer (MPL) and gas diffusion layer of proton exchange membrane fuel cells. In addition to macroscopic flow, the model also considers gas molecules using the Adzumi equation. Parameters such as the maximum pore size, porosity, fractal area dimension and fractal tortuosity dimension, and the thickness of the sample are used to predict the permeability. From scanning electron microscopic images, the two fractal dimensions are determined by the box-counting method. This model is validated by comparison with experimental measurement results. Effects of compression pressure and MPL baking time are studied. Results show that the gas permeability decreases with increasing compression pressure. Longer MPL baking time increases gas permeability, and cell performance.

KW - Fractal permeability

KW - Gas diffusion layer

KW - Microporous layer

KW - PEM fuel cell

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M3 - 期刊論文

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JO - Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an

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IS - 1

ER -

Fractal permeability models for the microporous layer and gas diffusion layer of PEM fuel cell

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