Membrane Science and Technology

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Nafion?/PANI composite membranes by in situ polymerization for direct methanol fuel cell

Authors： YANG Jinyan1*, WEI Xiaolan2, MENG Hui3

Units： 1. School of Chemistry and Envirment, Jiaying University, Meizhou Guangdong

KeyWords： PANI; Nafion?112 membrane; proton conductivity; methanol permeability; DMFC

ClassificationCode：TM911.4; O646

year,volume(issue):pagination： 2011, 31(4):22-26

Abstract：

Aniline monomer had been polymerized in Nafion®112 membrane using (0.1 mol?L-1)(NH4)2S2O8 /(1 mol?L-1) HCl solution as oxidant by an in situ chemical polymerization method. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) measurements indicated that there was an obvious difference between the plane of the composite membrane and Nafion®112 membrane, polyaniline (PANI) was mainly located in the two sides of the membrane. FT-IR spectroscopy of the composite membrane showed that the characteristic bands of PANI can be observed in it which meant PANI was successfully polymerized in Nafion®112 membrane. The proton conductivity of composite membrane was slightly lower than that of Nafion®112 membrane under completely humidity conditions, but the methanol crossover of composite membranes were obviously reduced. The permeability of NF/PANI-2 membrane was 1.83×10-6 cm2?s-1 which was 44% lower than that of Nafion®112 membrane. Correspondingly the direct methanol fuel cell (DMFC) with NF/PANI-2 membrane has a 7% higher open circuit voltage (OCV) and 30% higher maximum power density than that of Nafion®112 membrane.

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AuthorIntro：

杨金燕(1970-)，女，陕西人，博士，讲师，主要从事质子交换膜的研究. * 通讯联系人，E-mail: yangjinyanr@126.com

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