Electro-Osmosis and Water Uptake in Polymer Electrolytes in Equilibrium with Water Vapor at Low Temperatures

Kevin G. Gallagher; Bryan S. Pivovar; Thomas F. Fuller

doi:10.1149/1.2981864

Electro-Osmosis and Water Uptake in Polymer Electrolytes in Equilibrium with Water Vapor at Low Temperatures

Kevin G. Gallagher
, Bryan S. Pivovar
, Thomas F. Fuller

Chemistry and Nanoscience

Georgia Institute of Technology

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

4 Scopus Citations

Abstract

Measurements of the electro-osmotic drag coefficient for Nafion® and both random and multi-block co-polymer sulfonated poly(arylene ether sulfone) (BPSH) chemistries are reported for vapor equilibrated samples below 0 °C. No significant change in the drag coefficient behavior for Nafion from that reported above 0 °C is found. However BPSH is found to have a drag coefficient of 0.4. The implication of a drag coefficient less than unity in the interpretation of conduction mechanisms is discussed. Measurements of water sorption isotherms below 0 °C are also presented. A significant reduction in the capacity of polymer electrolytes to store water below 0 °C is found. This reduced water content is a result of the lower vapor pressure of ice compared to supercooled liquid.

Original language	American English
Pages (from-to)	297-307
Number of pages	11
Journal	ECS Transactions
Volume	16
Issue number	2
DOIs	https://doi.org/10.1149/1.2981864 https://doi.org/10.1149/1.2981864
State	Published - 2009
Event	Proton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting - Honolulu, HI, United States Duration: 12 Oct 2008 → 17 Oct 2008

NLR Publication Number

NREL/JA-560-45845

Keywords

fuel cells

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Cite this

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title = "Electro-Osmosis and Water Uptake in Polymer Electrolytes in Equilibrium with Water Vapor at Low Temperatures",

abstract = "Measurements of the electro-osmotic drag coefficient for Nafion{\textregistered} and both random and multi-block co-polymer sulfonated poly(arylene ether sulfone) (BPSH) chemistries are reported for vapor equilibrated samples below 0 °C. No significant change in the drag coefficient behavior for Nafion from that reported above 0 °C is found. However BPSH is found to have a drag coefficient of 0.4. The implication of a drag coefficient less than unity in the interpretation of conduction mechanisms is discussed. Measurements of water sorption isotherms below 0 °C are also presented. A significant reduction in the capacity of polymer electrolytes to store water below 0 °C is found. This reduced water content is a result of the lower vapor pressure of ice compared to supercooled liquid.",

keywords = "fuel cells",

author = "Gallagher, \{Kevin G.\} and Pivovar, \{Bryan S.\} and Fuller, \{Thomas F.\}",

year = "2009",

doi = "10.1149/1.2981864",

language = "American English",

volume = "16",

pages = "297--307",

journal = "ECS Transactions",

issn = "1938-5862",

publisher = "Electrochemical Society, Inc.",

number = "2",

note = "Proton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting ; Conference date: 12-10-2008 Through 17-10-2008",

}

TY - JOUR

T1 - Electro-Osmosis and Water Uptake in Polymer Electrolytes in Equilibrium with Water Vapor at Low Temperatures

AU - Gallagher, Kevin G.

AU - Pivovar, Bryan S.

AU - Fuller, Thomas F.

PY - 2009

Y1 - 2009

N2 - Measurements of the electro-osmotic drag coefficient for Nafion® and both random and multi-block co-polymer sulfonated poly(arylene ether sulfone) (BPSH) chemistries are reported for vapor equilibrated samples below 0 °C. No significant change in the drag coefficient behavior for Nafion from that reported above 0 °C is found. However BPSH is found to have a drag coefficient of 0.4. The implication of a drag coefficient less than unity in the interpretation of conduction mechanisms is discussed. Measurements of water sorption isotherms below 0 °C are also presented. A significant reduction in the capacity of polymer electrolytes to store water below 0 °C is found. This reduced water content is a result of the lower vapor pressure of ice compared to supercooled liquid.

AB - Measurements of the electro-osmotic drag coefficient for Nafion® and both random and multi-block co-polymer sulfonated poly(arylene ether sulfone) (BPSH) chemistries are reported for vapor equilibrated samples below 0 °C. No significant change in the drag coefficient behavior for Nafion from that reported above 0 °C is found. However BPSH is found to have a drag coefficient of 0.4. The implication of a drag coefficient less than unity in the interpretation of conduction mechanisms is discussed. Measurements of water sorption isotherms below 0 °C are also presented. A significant reduction in the capacity of polymer electrolytes to store water below 0 °C is found. This reduced water content is a result of the lower vapor pressure of ice compared to supercooled liquid.

KW - fuel cells

UR - https://www.scopus.com/pages/publications/63149091002

U2 - 10.1149/1.2981864

DO - 10.1149/1.2981864

M3 - Article

AN - SCOPUS:63149091002

SN - 1938-5862

VL - 16

SP - 297

EP - 307

JO - ECS Transactions

JF - ECS Transactions

IS - 2

T2 - Proton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting

Y2 - 12 October 2008 through 17 October 2008

ER -

Electro-Osmosis and Water Uptake in Polymer Electrolytes in Equilibrium with Water Vapor at Low Temperatures

Abstract

NLR Publication Number

Keywords

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