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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 精细化工国家重点实验室主任，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
Imidazolium functionalized polysulfone electrolyte membranes with varied chain structures: a comparative study
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论文类型：期刊论文
发表时间：2016-01-01
发表刊物：RSC ADVANCES
收录刊物：SCIE、EI
卷号：6
期号：37
页面范围：31336-31346
ISSN号：2046-2069
摘要：The alkaline electrolyte membrane (AEM) is one of the key materials for alkaline electrolyte membrane fuel cells. While most studies focus on AEM performance in relation to cation structure, ion exchange capacity (IEC) and membrane architecture (cross-linking, composite, microphase separation), herein we report that AEMs of varied backbone structures and comparable IEC show remarkably different conductivities and alkaline stability. In particular, the AEM of imidazolium functionalized, isopropylene-containing polysulfone exhibits higher conductivity, but lower swelling-and alkali tolerance than those without such a unit. To confirm and mitigate the backbone influence, we grafted the isopropylene-containing polysulfone with imidazolium functionalized side chains. The resulting grafted membrane shows conductivity of 64 mS cm(-1) at 80 degrees C, which is higher than that of the un-grafted AEMs; its stability against water swelling and hydroxide attack is also improved. Our study provides a new understanding on the structure-property correlation of AEMs, and thus is beneficial for designing high-performance electrolyte membranes for an alkaline fuel cell.
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