Influence of the phosphoric acid-doping level in a polybenzimidazole membrane on the cell performance of high-temperature proton exchange membrane fuel cells

被引：157

作者：

Oono, Yuka ^{[1
]}

Sounai, Atsuo ^{[2
]}

Hori, Michio ^{[1
]}

机构：

[1] Daido Inst Technol, Fuel Cell Res Ctr, Minami Ku, Aichi 4578530, Japan

[2] Suzuka Natl Coll Technol, Dept Mat Sci & Engn, Suzuka, Mie 5100294, Japan

来源：

JOURNAL OF POWER SOURCES | 2009年 / 189卷 / 02期

关键词：

High-temperature; Proton exchange membrane fuel cell (PEMFC); Polybenzimidazole (PBI); Phosphoric acid; Acid-doping level; Cell performance; DOPED POLYBENZIMIDAZOLE; CO-TOLERANCE; POLYMER ELECTROLYTES; IMPEDANCE DIAGNOSIS; CARBON-MONOXIDE; PBI MEMBRANE; DEGRADATION; OPERATION; CATALYST; PEMFC;

D O I：

10.1016/j.jpowsour.2008.12.115

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The acid migration in phosphoric acid-doped polybenzimidazole (PBI) membrane high-temperature proton exchange membrane fuel cells (HT-PEMFC) during operation is experimentally evaluated to clarify the influence of the acid balance between the membrane and electrodes on cell performance. A method for controlling the amount of phosphoric acid doped in PBI membranes is investigated, and PBI membranes with various amounts of phosphoric acid are prepared. Cell operation tests and AC impedance spectroscopy of cells fabricated with these membranes are conducted. It was found that the amount of phosphoric acid doped in the membranes can be controlled by changing the solution temperature and the immersion time in phosphoric acid solution. It was also found that the HT-PEMFC performance can be improved by optimizing the amount of phosphoric acid doped in the membrane and by diffusion of phosphoric acid into the catalyst layer during the initial stage of cell operation. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：943 / 949

页数：7

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