Measurement of Effective Oxygen Diffusivity in Microporous Media Containing Moisture

被引：6

作者：

Utaka, Yoshio ^{[1
]}

Iwasaki, Daigo ^{[2
]}

Tasaki, Yutaka ^{[3
]}

Wang, Shixue ^{[4
]}

机构：

[1] Yokohama Natl Univ, Div Syst Res, 79-5 Tokiwadai, Yokohama, Kanagawa 2408501, Japan

[2] Yokohama Natl Univ, Grad Sch Engn, Yokohama, Kanagawa, Japan

[3] Nissan Motor Co Ltd, Nissan Res Ctr, Fuel Cell Lab, Yokohama, Kanagawa, Japan

[4] Tianjin Univ, State Key Lab Engines, Tianjin, Peoples R China

来源：

HEAT TRANSFER-ASIAN RESEARCH | 2010年 / 39卷 / 04期

基金：

日本学术振兴会;

关键词：

oxygen diffusivity; microporous media; gas diffusion layer; galvanic battery; polymer electrolyte fuel cell;

D O I：

10.1002/htj.20295

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The mass transfer characteristics of the gas diffusion layer (GDL) are closely related to the cell performance of a polymer electrolyte fuel cell (PEFC). The oxygen diffusivity of paper type porous media, which is generally used as a GDL, was measured with respect to its liquid water content using experimental apparatus consisting of an oxygen sensor based on the galvanic cell. A numerical method was established to obtain the effective oxygen diffusivity of microporous test materials by calculating the oxygen concentration distribution on both sides of the test material. Experimental results indicate that the relative oxygen diffusivity of paper type GDLs increases nonlinearly as the water saturation decreases. (C) 2010 Wiley Periodicals, Inc.

引用

页码：262 / 276

页数：15

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