Nafion-Nafion/polyvinylidene fluoride-Nafion laminated polymer membrane for direct methanol fuel cells

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Abstract

The laminated composite polymer electrolyte membrane is prepared as a sandwich structure, i.e., Nafion-Nafion/polyvinylene difluoride (PVdF)-Nafion. The conductivity of the laminated membrane is 1.1×10-2Scm -1. The middle layer of PVdF/Nafion successfully blocks methanol cross-over. In tests in a direct methanol fuel cell (DMFC), all of the Nafion-Nafion/PVdF-Nafion membranes give higher power densities than with a Nafion membrane. The highest current density using a blend membrane with 20% PVdF at a constant cell voltage of 0.3V is 217.64mAcm-2 at 110°C. It is noteworthy that the Nafion-Nafion/PVdF-Nafion laminated membrane sustains high performance at temperatures above 130°C, whereas the performance of a Nafion membrane is drastically decreased.

Original languageEnglish
Pages (from-to)66-71
Number of pages6
JournalJournal of Power Sources
Volume135
Issue number1-2
DOIs
Publication statusPublished - 2004 Sep 3

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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