Synthesis and properties of a novel side-chain-type hydroxide exchange membrane for direct methanol fuel cells (DMFCs)

Shuai Xu, Gang Zhang, Yang Zhang, Chengji Zhao, Wenjia Ma, Hongcheng Sun, Na Zhang, Liyuan Zhang, Hao Jiang, Hui Na

Research output: Contribution to journalArticle

46 Scopus citations

Abstract

A series of poly(ether ether ketone) anion exchange membranes with tunable IEC (Ion-exchange capacity) values are polymerized from a novel bisphenol monomer (4-methyl)phenylhydroquinone. These poly(ether ether ketone) copolymers contain methyl groups on the rigid side chain. The degrees of bromination and quaternary amination of the copolymers are controlled by manipulating the contents of methyl groups in the copolymers. Hence, the IEC tunability of the membrane is achieved. The resulting PEEK-Q-xx membranes show good dimensional stability. The highest swelling ratio (PEEK-Q, with an IEC value of 0.90 mequiv. g -1) is only 9.0% at 80 °C, at which temperature, the hydroxide conductivity of PEEK-Q membrane is 0.031 S cm -1. The methanol permeability values of the membranes are all below 1.5 × 10 -7 cm 2 s -1, which are much lower than that of Nafion 117. These properties make the membranes good candidate materials for anion exchange membranes for alkaline direct methanol fuel cells.

Original languageEnglish (US)
Pages (from-to)228-235
Number of pages8
JournalJournal of Power Sources
Volume209
DOIs
StatePublished - Jul 1 2012

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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