TY - JOUR
T1 - Water uptake, ionic conductivity and swelling properties of anion-exchange membrane
AU - Duan, Qiongjuan
AU - Ge, Shanhai
AU - Wang, Chao Yang
N1 - Funding Information:
Partial support of this work by the Advanced Research Projects Agency – Energy (ARPA-E) under Award Number DE-AR0000121 is gratefully acknowledged. Prof. Jay Benziger at Princeton University and his group members are acknowledged for help and discussion, and Tokuyama Corporation for supplying membrane materials. Q. Duan is supported by a fellowship from the Chinese Scholarship Council.
PY - 2013
Y1 - 2013
N2 - Water uptake, ionic conductivity and dimensional change of the anion-exchange membrane made by Tokuyama Corporation (A201 membrane) are investigated at different temperatures and water activities. Specifically, the amount of water taken up by membranes exposed to water vapor and membranes soaked in liquid water is determined. The water uptake of the A201 membrane increases with water content as well as temperature. In addition, water sorption data shows Schroeder's paradox for the AEMs investigated. The swelling properties of the A201 membrane exhibit improved dimensional stability compared with Nafion membrane. Water sorption of the A201 membrane occurs with a substantial negative excess volume of mixing. The threshold value of hydrophilic fraction in the A201 membrane for ionic conductivity is around 0.34, above which, the conductivity begins to rise quickly. This indicates that a change in the connectivity of the hydrophilic domains occurs when hydrophilic fraction approaches 0.34.
AB - Water uptake, ionic conductivity and dimensional change of the anion-exchange membrane made by Tokuyama Corporation (A201 membrane) are investigated at different temperatures and water activities. Specifically, the amount of water taken up by membranes exposed to water vapor and membranes soaked in liquid water is determined. The water uptake of the A201 membrane increases with water content as well as temperature. In addition, water sorption data shows Schroeder's paradox for the AEMs investigated. The swelling properties of the A201 membrane exhibit improved dimensional stability compared with Nafion membrane. Water sorption of the A201 membrane occurs with a substantial negative excess volume of mixing. The threshold value of hydrophilic fraction in the A201 membrane for ionic conductivity is around 0.34, above which, the conductivity begins to rise quickly. This indicates that a change in the connectivity of the hydrophilic domains occurs when hydrophilic fraction approaches 0.34.
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U2 - 10.1016/j.jpowsour.2013.06.095
DO - 10.1016/j.jpowsour.2013.06.095
M3 - Article
AN - SCOPUS:84880079059
SN - 0378-7753
VL - 243
SP - 773
EP - 778
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
