Details

Autor(en) / Beteiligte

• Zhang, Yanmei
• Fang, Jun
• Wu, Yongbin
• Xu, Hankun
• Chi, Xianjun
• Li, Wei
• Yang, Yixu
• Yan, Ge
• Zhuang, Yongze

Titel

Novel fluoropolymer anion exchange membranes for alkaline direct methanol fuel cells

Ist Teil von

• Journal of colloid and interface science, 2012-09, Vol.381 (1), p.59-66

Ort / Verlag

Amsterdam: Elsevier Inc

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] ► A new kind of fluoropolymer anion exchange membrane was prepared. ► The membrane exhibited high ionic conductivity, good chemical, and thermal stability. ► The membrane was still intact after being hot-pressed at 2MPa for 5min at 50°C. ► A maximum power density of 53.2mWcm−2 of alkaline direct methanol fuel cell with the fluoropolymer membrane was achieved. 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°C ranging from 3.86×10−2Scm−1 to 4.36×10−2Scm−1. The methanol permeability coefficients of the membranes are in the range of 4.21–5.80×10−8cm2s−1 at 65°C. The novel membranes also show good chemical and thermal stability. An open-circuit voltage of 0.7V and a maximum power density of 53.2mWcm−2 of alkaline direct methanol fuel cell (ADMFC) with the membrane C, 1M methanol, 1M NaOH, and humidified oxygen are achieved at 65°C. Therefore, these membranes have great potential for applications in fuel cell systems.