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Title: Nano- and Mesoscale Ion and Water Transport in Perfluorosulfonic-Acid Membranes

Abstract

Water and aqueous cations transport along multiple length scales in perfluorosulfonic-acid membranes. Molecular interactions in hydrophilic domains dictate nanoscale resistances while the connectivity of domains controls mesoscale transport. The developed multiscale models probes the synergy of these length scales. Concentrated solution theory and electrokinetics are used to predict transport in the aqueous domains as a function of hydration. A resistor network upscales the nanoscale properties to predict effective membrane ion and water transport and their coupling. The nature of macroscopic and nanoscale properties differs drastically because the mesoscale network mediates transport. Moreover, the effective tortuosity and connectivity is not the same for water and ion transport. The methodology and findings highlight improvement opportunities for membrane performance.

Authors:
 [1];  [1]; ORCiD logo [2]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States). Dept. of Chemical and Biomolecular Engineering
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F)
OSTI Identifier:
1460292
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Conference
Journal Name:
ECS Transactions (Online)
Additional Journal Information:
Journal Volume: 80; Journal Issue: 8; Journal ID: ISSN 1938-6737
Publisher:
Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Crothers, Andrew Robert, Radke, Clayton J., and Weber, Adam Z. Nano- and Mesoscale Ion and Water Transport in Perfluorosulfonic-Acid Membranes. United States: N. p., 2017. Web. doi:10.1149/08008.0593ecst.
Crothers, Andrew Robert, Radke, Clayton J., & Weber, Adam Z. Nano- and Mesoscale Ion and Water Transport in Perfluorosulfonic-Acid Membranes. United States. doi:10.1149/08008.0593ecst.
Crothers, Andrew Robert, Radke, Clayton J., and Weber, Adam Z. Thu . "Nano- and Mesoscale Ion and Water Transport in Perfluorosulfonic-Acid Membranes". United States. doi:10.1149/08008.0593ecst.
@article{osti_1460292,
title = {Nano- and Mesoscale Ion and Water Transport in Perfluorosulfonic-Acid Membranes},
author = {Crothers, Andrew Robert and Radke, Clayton J. and Weber, Adam Z.},
abstractNote = {Water and aqueous cations transport along multiple length scales in perfluorosulfonic-acid membranes. Molecular interactions in hydrophilic domains dictate nanoscale resistances while the connectivity of domains controls mesoscale transport. The developed multiscale models probes the synergy of these length scales. Concentrated solution theory and electrokinetics are used to predict transport in the aqueous domains as a function of hydration. A resistor network upscales the nanoscale properties to predict effective membrane ion and water transport and their coupling. The nature of macroscopic and nanoscale properties differs drastically because the mesoscale network mediates transport. Moreover, the effective tortuosity and connectivity is not the same for water and ion transport. The methodology and findings highlight improvement opportunities for membrane performance.},
doi = {10.1149/08008.0593ecst},
journal = {ECS Transactions (Online)},
issn = {1938-6737},
number = 8,
volume = 80,
place = {United States},
year = {2017},
month = {8}
}

Conference:
Other availability
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