Proton-conducting composite membranes derived from sulfonated hydrocarbon and inorganic materials

Jae Hyuk Chang, Jong Hyeok Park, Gu Gon Park, Chang Soo Kim, O. Ok Park

Research output: Contribution to journalArticle

141 Citations (Scopus)


Composite polymer membranes are prepared by embedding layered silicates such as Laponite and Montmorillonite (MMT) into sulfonated poly(ether ehter ketone) (sPEEK) membranes for fuel-cell applications. Sulfonation of the polymer increased membrane hydrophilicity to give good proton conductivity. Layered silicates incorporated into polymer membranes help to reduce swelling significantly in hot water; they also help to decrease methanol permeability. These polymer/clay composite membranes show thermal stability to 240°C and (3-3.5) × 10-3 Scm-1 proton conductivity at room temperature. In addition, methanol cross-over is reduced without a serious reduction in the proton conductivity. In a single-cell test using hydrogen and oxygen, the prepared membranes give current densities that are between 70 and 80% of those with Nafion 115 membranes. As a result, for polymer electrolytes, sPEEK/clay composite membranes offer a low-cost alternative to perfluorinated membranes.

Original languageEnglish
Pages (from-to)18-25
Number of pages8
JournalJournal of Power Sources
Issue number1
Publication statusPublished - 2003 Oct 1


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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