Indexed by:
期刊论文
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,Benziger, Jay
Date of Publication:
2014-03-15
Journal:
JOURNAL OF POWER SOURCES
Included Journals:
SCIE、EI
Document Type:
J
Volume:
250
Page Number:
90-97
ISSN No.:
0378-7753
Key Words:
Imidazolium; Poly(ether ether ketone); Ionomer; Alkaline anion exchange
membrane; Alkaline membrane direct methanol fuel cell
Abstract:
A series of imidazolium-functionalized poly(ether ether ketone)s (PEEK-ImOHs) were successfully synthesized by a two-step chloromethylation-Menshutkin reaction followed by hydroxide exchange. PEEK-ImOH membranes with ion exchange capacity (IEC) ranging from 1.56 to 2.24 mmol g(-1) were prepared by solution casting. PEEK-ImOHs show selective solubility in aqueous solutions of acetone and tetrahydrofuran, but are insoluble in lower alcohols. PEEK-ImOH membranes with IEC of 2.03 mmol g(-1) have high hydroxide conductivity (52 mS cm(-1) at 20 degrees C), acceptable water swelling ratio (51% at 60 degrees C), and great tensile strength (78 MPa), and surprising flexibility (elongation-to-break of 168%), and high thermal stability (Decomposition temperature: 193 degrees C). In addition, PEEK-ImOH membranes show low methanol permeability (1.3-6.9 x 10(-7) cm(2) s(-1)). PEEK-ImOH membrane was tested in methanol/O-2 fuel cell as both the HEM and the ionomer impregnated into the catalyst layer; the open circuit voltage is 0.84 V and the peak power density is 31 mW cm(-2). (C) 2013 Elsevier B.V. All rights reserved.
Translation or Not:
no
