Nuclear magnetic resonance microimaging investigation of membrane electrode assembly of fuel cells: morphology and solvent dynamics

被引：11

作者：

Wu, Zhen ^{[1
,2
]}

Wu, Chien-Shun ^{[3
]}

Chu, Peter Po-Jen ^{[3
]}

Ding, Shangwu ^{[1
,2
]}

机构：

[1] Natl Sun Yat Sen Univ, Dept Chem, Kaohsiung 80424, Taiwan

[2] Natl Sun Yat Sen Univ, Ctr Nanosci & Nanotechnol, Kaohsiung 80424, Taiwan

[3] Natl Cent Univ, Dept Chem, Chungli 305, Taiwan

来源：

MAGNETIC RESONANCE IMAGING | 2009年 / 27卷 / 06期

关键词：

Fuel cell; Membrane electrode assembly (MEA); Morphology; Magnetic resonance microimaging; Relaxation; Weighting; Diffusion; Chemical shift selection; LIQUID WATER; METHANOL CROSSOVER; PROTON TRANSPORT; NAFION; NMR; SIMULATION; ACID; F-19; PERFORMANCE; DIFFUSION;

D O I：

10.1016/j.mri.2008.11.001

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

The structure and solvent (water, methanol, etc.) dynamics of a number of fuel membrane electrode assembly (MEA) samples are studied with nuclear magnetic resonance microimaging with spatial resolution of tens of micrometers. The micrometer-scale inhomogeneity of the samples is observed and confirmed with various weighting methods. In particular, diffusion coefficients at different positions in MEA are clearly differentiated. Furthermore, chemical shift selection imaging enables one to investigate the spatial distribution and dynamics of individual chemical groups. These types of information offer us insights into the working principle of fuel cell and pave the way to in situ studies of operating fuel cells. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：871 / 878

页数：8

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