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

Zhen Wu; Chien Shun Wu; Peter Po Jen Chu; Shangwu Ding

doi:10.1016/j.mri.2008.11.001

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

Zhen Wu, Chien Shun Wu, Peter Po Jen Chu, Shangwu Ding

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	871-878
Number of pages	8
Journal	Magnetic Resonance Imaging
Volume	27
Issue number	6
DOIs	https://doi.org/10.1016/j.mri.2008.11.001
State	Published - Jul 2009

Keywords

Chemical shift selection
Diffusion
Fuel cell
Magnetic resonance microimaging
Membrane electrode assembly (MEA)
Morphology
Relaxation
Weighting

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10.1016/j.mri.2008.11.001

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

abstract = "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.",

keywords = "Chemical shift selection, Diffusion, Fuel cell, Magnetic resonance microimaging, Membrane electrode assembly (MEA), Morphology, Relaxation, Weighting",

author = "Zhen Wu and Wu, {Chien Shun} and Chu, {Peter Po Jen} and Shangwu Ding",

note = "Funding Information: This work was supported by the Program for Promoting Academic Excellence of Universities funded by the National Science Council of the Republic of China (Contract No. NSC95-2752-M-110-001-PAE and NSC95-2752-M-110-001-PAE to S.D. and NSC-95-2113-M-008-014 to P.J.C.).",

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doi = "10.1016/j.mri.2008.11.001",

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T2 - morphology and solvent dynamics

AU - Wu, Zhen

AU - Wu, Chien Shun

AU - Chu, Peter Po Jen

AU - Ding, Shangwu

N1 - Funding Information: This work was supported by the Program for Promoting Academic Excellence of Universities funded by the National Science Council of the Republic of China (Contract No. NSC95-2752-M-110-001-PAE and NSC95-2752-M-110-001-PAE to S.D. and NSC-95-2113-M-008-014 to P.J.C.).

PY - 2009/7

Y1 - 2009/7

N2 - 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.

AB - 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.

KW - Chemical shift selection

KW - Diffusion

KW - Fuel cell

KW - Magnetic resonance microimaging

KW - Membrane electrode assembly (MEA)

KW - Morphology

KW - Relaxation

KW - Weighting

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DO - 10.1016/j.mri.2008.11.001

M3 - 期刊論文

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AN - SCOPUS:67349123131

SN - 0730-725X

VL - 27

SP - 871

EP - 878

JO - Magnetic Resonance Imaging

JF - Magnetic Resonance Imaging

IS - 6

ER -

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

Abstract

Keywords

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