Molecular Design Aspect of Sulfonated Polymers for Direct Methanol Fuel Cells

Dae Sik Kim, Michael Guiver, James E. McGrath, Bryan S. Pivovar, Yu Seung Kim

Research output: Contribution to journalArticlepeer-review

13 Scopus Citations


Molecular structural effects of sulfonated polymers for direct methanol fuel cells (DMFCs) are investigated using a length scale parameter, Percent Conducting Volume (PCV). Sulfonated polymers were categorized based on molecular composition (nanometer length scale) and polymer architecture (sub micrometer length scale) and plotted methanol permeability as a function of PCV and molecular structure. Polymers having functional group such as base moiety, hydrogen bonding, or cross-linking agent showed the least methanol permeability while fluorinated polymers showed the highest methanol permeability at a given PCV. DMFC performance of selected sulfonated polymers is presented in order to support the analysis.

Original languageAmerican English
Pages (from-to)711-717
Number of pages7
JournalECS Transactions
Issue number1
StatePublished - 2010
Event10th Polymer Electrolyte Fuel Cell Symposium, PEFC 10 - 218th ECS Meeting - Las Vegas, NV, United States
Duration: 10 Oct 201015 Oct 2010

NREL Publication Number

  • NREL/JA-5600-48744


  • direct methanol fuel cells


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