Density Measurements and Partial Molar Volume Analysis of Different Membranes for Polymer Electrolyte Membrane Fuel Cells

被引：22

作者：

Bai, Yujia ^{[1
]}

Schaberg, Mark S. ^{[2
]}

Hamrock, Steven J. ^{[2
]}

Tang, Zhijiang ^{[1
]}

Goenaga, Gabriel ^{[1
]}

Papandrew, Alexander B. ^{[1
]}

Zawodzinski, Thomas A., Jr. ^{[1
,3
]}

机构：

[1] Univ Tennessee, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA

[2] 3M Co, 3M Energy Components Program, St Paul, MN 55144 USA

[3] Oak Ridge Natl Lab, Phys Chem Mat Grp, Oak Ridge, TN 37830 USA

来源：

ELECTROCHIMICA ACTA | 2017年 / 242卷

关键词：

PEM fuel cell; membranes; water uptake; density; partial molar volumes; WATER-UPTAKE; PROTON TRANSPORT; THERMODYNAMICS; ADSORPTION; IONOMERS; MANAGEMENT; MORPHOLOGY; HYDRATION; CARBONS;

D O I：

10.1016/j.electacta.2017.04.048

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The density of membranes in polymer electrolyte membrane fuel cells (PEMFC) is an important parameter that has not been widely measured. In this paper, water uptake, hydration enthalpy and density were measured for a series of equilibrated Nafion and 3M ionomer membranes with different acid groups and equivalent weights. A systematic method is developed for measuring the density of hydrated membranes and the statistics associated with the measurement are assessed. Partial molar volumes of water in different membranes are calculated from the density data and used to analyze water/polymer interaction during water uptake process. Several aspects of the thermodynamics of these systems are reconciled and some mechanistic aspects of water uptake are elucidated. (C) 2017 Published by Elsevier Ltd.

引用

页码：307 / 314

页数：8

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