Preparation and Stability of Quaternary Ammonium Based Solid Alkaline Electrolyte Membrane for Fuel Cells

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (7): 1598.

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Preparation and Stability of Quaternary Ammonium Based Solid Alkaline Electrolyte Membrane for Fuel Cells

FU Jing¹, QIAO Jin-Li^2*, MA Jian-Xin³

1. School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China;
2. School of Environmental Science and Engineering, Donghua University, Shanghai 201260, China;
3. Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, China

Received:2010-08-17 Revised:2010-10-29 Online:2011-07-10 Published:2011-06-02
Contact: Jin LiQIAO E-mail:qiaojl@dhu.edu.cn
Supported by:
上海市浦江人才基金(批准号: 08PJ14096)、上海市自然科学基金(批准号: 09ZR1433300)和教育部归国留学人员基金[批准号: 2009(1001)]资助.

Abstract

Abstract: The solid alkaline electrolyte membranes have been succesfully prepared from poly(vinyl alcohol)/poly(acrylamide-co-diallyldimethylammonium chloride) (PVA/PAADDA) by chemical cross-linking. The molecular structure, morphology, thermal stability, alkali resistance durability, dimensional stability and conductivity of the PVA/PAADDA membranes were characterized using fourier transform infrared spectra (FTIR), scanning electron microscope (SEM), thermogravimetric analysis (TGA) and alternating current impedance technique. FTIR results indicated that PAADDA was successfully blended in the polymer matrix. The phase separation of the PVA/PAADDA membrane in 1:1 mass ratio was observed by SEM. From the TGA, the increasing content of PAADDA into polymer matrics has little effect on the thermal stability and, the good thermal stability around 210 oC was obtained . The membranes showed perfect alkali resistance durability even conditioned at elevated temperatures and high concentration of KOH (80 oC, 6 mol?L-1). Meanwhile, the PVA/PAADDA membrane exhibited good dimensional and conductivity stability towarded water at 60 oC after 300 h due to its dense semi-interpenetrating networks in polymer matrics. In addition, the methanol uptake of the PVA/PAADDA membrane showed almost no changes after conditioned at elevated temperatures and, were 5 times lower than that of Nafion115 membrane after conditioned at 90 oC.

Key words: Solid alkaline electrolyte membranes, Poly(vinyl alcohol), Poly(acrylamide-co- diallyldimethylammonium chloride), chemical cross-linking, stability

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FU Jing, QIAO Jin-Li*, MA Jian-Xin. Preparation and Stability of Quaternary Ammonium Based Solid Alkaline Electrolyte Membrane for Fuel Cells[J]. Chem. J. Chinese Universities, 2011, 32(7): 1598.

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Preparation and Stability of Quaternary Ammonium Based Solid Alkaline Electrolyte Membrane for Fuel Cells

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