標題: | Synthesis and characterization of new sulfonated polytriazole proton exchange membrane by click reaction for direct methanol fuel cells (DMFCs) |
作者: | Huang, Yao Jheng Ye, Yun Sheng Yen, Ying Chieh Tsai, Li Duan Hwang, Bing Joe Chang, Feng Chih 應用化學系 Department of Applied Chemistry |
關鍵字: | Sulfonated polytriazole;Click chemistry;Proton exchange membrane;Acid-base interaction |
公開日期: | 1-十一月-2011 |
摘要: | Sulfonated polytriazole (SPTA) in which the acidic sulfonic acid and basic triazole groups act as physical crosslinking sites within a polymer backbone has been successfully prepared, for use as a proton exchange membrane, using the click reaction. The acid-base interactions of the SPTA membranes leads to the formation of well-dispersed ionic clusters and the random distribution of ion channels with good connectivity resulting in lower methanol permeabilities at ambient temperatures and similar or higher proton conductivities than Nafion 117 at 80 degrees C in conditions of near zero relative humidity. Proton conductivities (sigma) of 0.149 S cm(-1) at 80 degrees C and 9 x 10(-5) S cm(-1) in anhydrous conditions together with low methanol permeability (P) at 0.1 x 10(-6) cm(2) s(-1) that are comparable or superior to Nafion 117 (sigma(T=80) : 0.151 S cm(-1); sigma(RH=0) : 3 x 10(-5) S cm(-1); P(T=30): 1.31 x 10(-6) cm(2) s(-1)) were achieved. Additionally, the selectivity of SPTA is approximately four times higher than that of Nafion 117, thus it may have potential for use in direct methanol fuel cells (DMFCs). Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.ijhydene.2011.08.093 http://hdl.handle.net/11536/14675 |
ISSN: | 0360-3199 |
DOI: | 10.1016/j.ijhydene.2011.08.093 |
期刊: | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY |
Volume: | 36 |
Issue: | 23 |
起始頁: | 15333 |
結束頁: | 15343 |
顯示於類別: | 期刊論文 |