• 文献标题:   A monolayer graphene - Nafion sandwich membrane for direct methanol fuel cells
  • 文献类型:   Article
  • 作  者:   YAN XH, WU RZ, XU JB, LUO ZT, ZHAO TS
  • 作者关键词:   fuel cell, direct methanol fuel cell, monolayer graphene, high energy density
  • 出版物名称:   JOURNAL OF POWER SOURCES
  • ISSN:   0378-7753 EI 1873-2755
  • 通讯作者地址:   Hong Kong Univ Sci Technol
  • 被引频次:   57
  • DOI:   10.1016/j.jpowsour.2016.02.030
  • 出版年:   2016

▎ 摘  要

Methanol crossover due to the low selectivity of proton exchange membranes is a long-standing issue in direct methanol fuel cell technology. Here we attempt to address this issue by designing a composite membrane fabricated by sandwiching a monolayer graphene between two thin Nafion membranes to take advantage of monolayer graphene's selective permeability to only protons. The methanol permeability of the present membrane is demonstrated to have a 68.6% decrease in comparison to that of the pristine Nafion membrane. The test in a passive direct methanol fuel cell (DMFC) shows that the designed membrane retains high proton conductivity while substantially suppressing methanol crossover. As a result, the present membrane enables the passive DMFC to exhibit a decent performance even at a methanol concentration as high as 10.0 M. (C) 2016 Elsevier B.V. All rights reserved.