Standard Article

Perfluorinated membranes

Fuel Cell Technology and Applications

Polymer electrolyte membrane fuel cells and systems (PEMFC)

Membrane materials

  1. M. Doyle1,
  2. G. Rajendran2

Published Online: 15 DEC 2010

DOI: 10.1002/9780470974001.f303034

Handbook of Fuel Cells

Handbook of Fuel Cells

How to Cite

Doyle, M. and Rajendran, G. 2010. Perfluorinated membranes. Handbook of Fuel Cells. .

Author Information

  1. 1

    DuPont Microcircuit Materials, Research Triangle Park, NC, USA

  2. 2

    DuPont Central Research & Development, Wilmington, DE, USA

Publication History

  1. Published Online: 15 DEC 2010

Abstract

Perfluorinated ionomer membranes have been the topic of a tremendous amount of research for over three decades due to their use as the predominant membrane system for proton exchange membrane fuel cell (PEMFC) applications. Their excellent physical properties, including high proton conductivity, oxidative and reductive stability, and mechanical properties, have enabled the PEMFC to reach the levels of performance achieved to date. However, the demands on the fuel cell system are increasing as new applications loom with their needs for lower cost, higher performance, and flexibility to accommodate new fuels. System demands are pushing operating temperatures higher, causing the water balance and humidification of the perfluorinated ionomer membrane to become important issues.

This section reviews the status of research and development activities around the Nafion® perfluorinated ionomer membrane and Nafion® solutions. The focus of the review is on the measurement of physical property data and new insights into the mechanisms of conduction in these systems. An attempt is made to summarize recent structural studies and characterization techniques that are bringing new insights into the conduction process, as well as recent efforts in mathematical modeling and computer simulations of the conduction process. Finally, membrane-related issues that arise in the direct methanol PEMFC are reviewed and data on methanol transport in Nafion® membranes are summarized.

Keywords:

  • Nafion® membranes;
  • Nafion® solutions;
  • perfluorinated ionomer membranes;
  • proton exchange membranes;
  • ionomers;
  • ionic conductivity;
  • ion clustering;
  • water drag coefficient