Effect of wettability-distribution pattern of the gas diffusion layer with a microgrooved separator on polymer electrolyte fuel cell performance

JOURNAL OF POWER SOURCES

卷:363

Article

Utaka, Yoshio^1,2  Koresawa, Ryo³ 

[1] Tianjin Univ, Sch Mech Engn, 135 Yaguan Rd,Tianjin Haihe Educ Pk, Tianjin 300350, Peoples R China

[2] Tianjin Univ, Minist Educ China, Key Lab Efficient Utilizat Low & Medium Grade Ene, Tianjin, Peoples R China

[3] Yokohama Natl Univ, Grad Sch Engn, 79-5 Tokiwadai, Yokohama, Kanagawa 2408501, Japan

关键词: Polymer electrolyte fuel cell;    Water management;    Hybrid GDL;    Wettability-distribution pattern;    Gas channel;    Microgrooves;   

DOI  :  10.1016/j.jpowsour.2017.07.095

来源: Elsevier

【 摘 要 】

In this study, the combination of a gas diffusion layer (GDL) with wettability distribution and gas-flow channels with microgrooves is proposed to reduce the concentration overvoltage of polymer electrolyte fuel cells. The effects of the wettability-distribution pattern and linear angle of the stripe-wise wettability distribution of the GDL on the cell performance are experimentally investigated. Examination of the wettability-distribution pattern show that not only the liquid-water distribution inside a hybrid GDL but also the liquid-water control on the GDL surface are important factors to consider in reducing the concentration overvoltage. Furthermore, in considering the hybrid angle effect, when the angle with the gas channel is shallow, especially at 20, the critical current and maximum power are maximized. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free