首页 | 本学科首页   官方微博 | 高级检索  
     


Enhanced transport properties in polymer electrolyte composite membranes with graphene oxide sheets
Authors:Bong Gill Choi  Yun Suk Huh  Young Chul Park  Doo Hwan Jung  Won Hi Hong  HoSeok Park
Affiliation:1. Department of Chem. & Biomolecular Eng. (BK21), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea;2. Division of Material Science, Korea Basic Science Institute, Daejeon 305-333, Republic of Korea;3. Advanced Fuel Cell Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yusong-gu, Daejeon, Republic of Korea;4. Department of Chemical Engineering, College of Engineering, Kyung Hee University, Yongin-si 446-701, Republic of Korea
Abstract:Polymer electrolyte membranes have been widely investigated for high performance fuel cells. Here, we report the synthesis of ionic conductive Nafion/graphene oxide (GO) composite membranes for application in direct methanol fuel cells. GOs interact with both the non-polar backbone and the polar ionic clusters of Nafion because of their amphiphilic characteristics attributable to hydrophobic conjugation and hydrophilic functional groups. Accordingly, GO sheets serve to modify the microstructures of two domains of Nafion. In particular, the transport properties of Nafion are favorably manipulated by the incorporation of GO. This modulated the ionic channels of Nafion and decrease methanol crossover while preserving ionic conductivity. Furthermore, strong interfacial interactions due to the insertion of GO nanofillers into the Nafion matrix improve the thermal and mechanical properties of the material. In particular, we exploit Nafion/GO composite membrane as electrolyte material for direct methanol fuel cell (DMFC) in order to resolve current issue of methanol crossover. This composite membrane-based DMFC compared to the Nafion 112-based DMFC remarkably enhanced cell performance, especially in severe operating conditions.
Keywords:
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号