Novel fluoropolymer anion exchange membranes for alkaline direct methanol fuel cells

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• 作者：Yanmei Zhang ; Jun Fang ; Yongbin Wu ; Hankun Xu ; Xianjun Chi ; Wei Li ; Yixu Yang ; Ge Yan ; Yongze Zhuang
• 关键词：Anion exchange membrane ; Fuel cell ; Vinylbenzyl chloride ; Hexafluorobutyl methacrylate ; Fluoropolymer
• 刊名：Journal of Colloid and Interface Science
• 出版年：2012
• 出版时间：1 September, 2012
• 年：2012
• 卷：381
• 期：1
• 页码：59-66
• 全文大小：803 K

文摘

A series of novel fluoropolymer anion exchange membranes based on the copolymer of vinylbenzyl chloride, butyl methacrylate, and hexafluorobutyl methacrylate has been prepared. Fourier transform infrared (FT-IR) spectroscopy and elemental analysis techniques are used to study the chemical structure and chemical composition of the membranes. The water uptake, ion-exchange capacity (IEC), conductivity, methanol permeability, and chemical stability of the membranes are also determined. The membranes exhibit high anionic conductivity in deionized water at 65 ¡ãC ranging from 3.86 ¡Á 10^?2 S cm^?1 to 4.36 ¡Á 10^?2 S cm^?1. The methanol permeability coefficients of the membranes are in the range of 4.21-5.80 ¡Á 10^?8 cm² s^?1 at 65 ¡ãC. The novel membranes also show good chemical and thermal stability. An open-circuit voltage of 0.7 V and a maximum power density of 53.2 mW cm^?2 of alkaline direct methanol fuel cell (ADMFC) with the membrane C, 1 M methanol, 1 M NaOH, and humidified oxygen are achieved at 65 ¡ãC. Therefore, these membranes have great potential for applications in fuel cell systems.