Indexed by:
期刊论文
First Author:
Wu, Xuemei
Correspondence Author:
He, GH (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Res & Dev Ctr Membrane Sci & Technol, Dalian 116024, Peoples R China.
Co-author:
He, Gaohong,Li, Xiangcun,Nie, Fei,Yan, Xiaoming,Yu, Lu,Benziger, Jay
Date of Publication:
2014-01-15
Journal:
JOURNAL OF POWER SOURCES
Included Journals:
SCIE、EI
Document Type:
J
Volume:
246
Page Number:
482-490
ISSN No.:
0378-7753
Key Words:
Proton exchange membranes; Interpenetrating polymer networks; Poly
(ether ether ketone); Ionomers; Fuel cells
Abstract:
Crosslinked poly (styrene sulfonic acid) (CrPSSA) is incorporated into sulfonated poly (ether ether ketone) (SPEEK) through the semi-interpenetrating polymer networks (sIPNs) method to improve proton conductivity of SPEEK proton exchange membranes (PEMs) at low relative humidity (RH). Thermogravimetric analysis indicates that the SPEEK/CrPSSA sIPN membrane can be stable up to 250 degrees C in N-2. A single glass transition temperature (T-g) of the sIPN measured by differential scanning calorimetric measurements suggests good miscibility of the CrPSSA and SPEEK. At fixed RH the proton conductivity of the sIPN membranes increases as more CrPSSA is incorporated into SPEEK membranes. The sIPN membrane with 40 wt.% CrPSSA has a proton conductivity of 10(-3) S cm(-1) at 25% RH, which comparable to that of Nafion115 and is 2 orders of magnitude higher than that of the pristine SPEEK membranes (10(-5) S cm(-1) at RH 50%). The percolation threshold for proton conduction occurs at lower hydrophilic volume fractions with the increasing content of CrPSSA, suggesting different packing behavior of -SO3H groups in the SPEEK/CrPSSA sIPN membranes as compared with SPEEK and Nafion(R) membranes. (C) 2013 Elsevier B.V. All rights reserved.
Translation or Not:
no
