Oxygen partial pressures on gas-diffusion layer surface and gas-flow channel wall in polymer electrolyte fuel cell during power generation studied by visualization technique combined with numerical simulation

JOURNAL OF POWER SOURCES

卷:269

Article

Ishigami, Yuta¹  Waskitoaji, Wihatmoko²  Yoneda, Masakazu³  Takada, Kenji¹  Hyakutake, Tsuyoshi²  Suga, Takeo²  Uchida, Makoto⁴  Inukai, Junji⁴  Nishide, Hiroyuki²  Watanabe, Masahiro⁴ 

[1] Univ Yamanashi, Interdisciplinary Grad Sch Med & Engn, Kofu, Yamanashi 4008511, Japan

[2] Waseda Univ, Dept Appl Chem, Shinjuku Ku, Tokyo 1698555, Japan

[3] Mizuho Informat & Res Inst Inc, Chiyoda Ku, Tokyo 1018443, Japan

[4] Univ Yamanashi, Fuel Cell Nanomat Ctr, Kofu, Yamanashi 4000021, Japan

关键词: Polymer electrolyte fuel cell;    Visualization of oxygen partial pressure;    Gas diffusion layer;    Gas-flow channel;    Oxygen reduction reaction;    Numerical modeling;   

DOI  :  10.1016/j.jpowsour.2014.07.017

来源: Elsevier

【 摘 要 】

Visualization of the oxygen partial pressures was carried out at the surface of a gas diffusion layer (GDL) for the first time together with the upper part of the gas-flow channel of the cathode of a running polymer electrolyte fuel cell (PEFC) using two different oxygen-sensitive luminescent dye films. The visualized distributions of the oxygen partial pressures at the GDL and the upper gas-flow channel during the PEFC operation were very different in a conventional test cell. The change in the distribution of the oxygen partial pressures was observed by changing the oxygen utilization, which should be connected with the reactive locations in the membrane-electrode assembly (MEA). A numerical calculation was carried out to understand the distributions of water and current density inside the MEA. The water distribution inside the MEA was confirmed to strongly affect the distributions of the current density and the oxygen /partial pressure. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free