|
个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 精细化工全国重点实验室主任，教育部智能材料化工前沿科学中心执行主任，大连理工大学膜科学与技术研究开发中心主任
性别：女
毕业院校：中国科学院大连化物所
学位：博士
所在单位：化工学院
学科：化学工程. 膜科学与技术. 生物医学工程
联系方式：hgaohong@dlut.edu.cn
电子邮箱：hgaohong@dlut.edu.cn
Guanidimidazole-quanternized and cross-linked alkaline polymer electrolyte membrane for fuel cell application
点击次数：
论文类型：期刊论文
发表时间：2016-03-01
发表刊物：JOURNAL OF MEMBRANE SCIENCE
收录刊物：SCIE、EI
卷号：501
页面范围：100-108
ISSN号：0376-7388
关键字：Resonance-enhanced cation; Anion exchange membrane; Alkaline stability; Swelling resistance; LUMO energy
摘要：A modified imidazole, namely guanidimidazole (Gim) was designed and synthesized as a novel quaternizing- and cross-linking agent for alkaline polymer electrolyte membrane fabrication. The resulting membrane was more alkali tolerant and swelling resistant than that quaternized purely by 1-methylimidazole owing to the enhanced resonance and cross-linking ability of Gim, the former confirmed by a LUMO (lowest unoccupied molecular orbital) energy calculation. The membrane also showed good ionic conductivity, mechanical strength and thermal stability. A H-2/O-2 fuel cell using the synthesized membrane showed a peak power density of 39 mW cm(-2) at 50 degrees C. This work preliminarily demonstrates the beneficial effect of imidazole modification by both experimental and computational investigation; it provides a new cation design strategy that may potentially achieve simultaneous improvement of alkali stability and swelling resistance of alkaline electrolyte membranes. (C) 2015 Elsevier B.V. All rights reserved.