Indexed by:
Journal Papers
First Author:
Yan, Xiaoming
Correspondence Author:
He, GH (reprint author), Dalian Univ Technol, Sch Chem Engn, Res & Dev Ctr Membrane Sci & Technol, State Key Lab Fine Chem, Dalian 116024, LN, Peoples R China.
Co-author:
Gu, Shuang,He, Gaohong,Wu, Xuemei,Zheng, Wenji,Ruan, Xuehua
Date of Publication:
2014-09-15
Journal:
JOURNAL OF MEMBRANE SCIENCE
Included Journals:
SCIE、EI、Scopus
Document Type:
J
Volume:
466
Page Number:
220-228
ISSN No.:
0376-7388
Key Words:
Poly(ether ether ketone); Quaternary phosphonium; Phosphonization;
Hydroxide exchange membrane; Alkaline membrane fuel cells
Abstract:
A series of quaternary phosphonium-functionalized poly(ether ether ketone)s (PEEK-QPOHs) have been synthesized by phosphorization reaction, and their membranes have been prepared by a solution casting method. Ion exchange capacity (IEC) of PEEK-QPOH membranes ranges from 0.89 to 1.19 mmol g(-1) with the degree of chloromethylation from 70% to 126%. Not only are PEEK-QPOH polymers soluble in typical high-boiling-point membrane-forming solvents, but also they are soluble in some low-boiling-point water-miscible solvents (low alcohols), implying their ability to serve as both membranes and ionomers. PEEK-QPOH membranes showed high hydroxide conductivity, e.g., a PEEK-QPOH 126% membrane (with IEC of 1.19 mmol g(-1)) exhibited 61 and 89 mS cm(-1) at 20 degrees C and 60 degrees C, respectively. Based on the same polymer backbone of PEEK, quaternary phosphonium-functionalized PEEK membranes are more hydroxide-conductive and more alkali-stable than quaternary ammonium- and imidazolium-functionalized counterparts. All these properties indicate PEEK-QPOH is one of the most promising HEM materials for potential applications in alkaline membrane fuel cells. (C) 2014 Published by Elsevier B.V.
Translation or Not:
no
