Synthesis and characterization of polyethylene-g-sulfonated polysulfone copolymers for proton exchange membranes

Hyung Kyu Kim, Min Zhang, Xuepei Yuan, S. N. Lvov, T. C. Mike Chung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper discusses a new class of PEMs that are based on a PE-g-s-PAES graft copolymer containing several sulfonated poly(arylene ethersulfone) side chains. The unique combination of hydrophobicity, semi-crystallinity, and high molecular weight of PE backbone offers PEM with a strong and stable (non-swellable) matrix, and the embedded hydrophilic s-PAES proton-conductive domains show only moderate water swelling (δ <15) even with high IEC >3 mmol/g in the s-PAES domains. All PE-g-s-PAES PEMs show higher through-plane conductivity (up to 160 mS/cm) than in-plane conductivity, as well as good fuel selectivity. Evidently, the low surface energy of PE backbone forms a thin hydrophobic layer on the PEM surfaces that not only result in anisotropic conductivity but also create a methanol diffusion barrier to prevent fuel loss. Overall, the newly developed PE-g-s-PAES membranes offer a desirable set of PEM properties, including conductivity, selectivity, mechanical strength, stability, and cost-effective, for fuel cell applications.

Original languageEnglish (US)
Title of host publicationPolymer Electrolyte Fuel Cells 12, PEFC 2012
Pages1055-1071
Number of pages17
Edition2
DOIs
StatePublished - Dec 1 2012
Event12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting - Honolulu, HI, United States
Duration: Oct 7 2012Oct 12 2012

Publication series

NameECS Transactions
Number2
Volume50
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting
CountryUnited States
CityHonolulu, HI
Period10/7/1210/12/12

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Kim, H. K., Zhang, M., Yuan, X., Lvov, S. N., & Mike Chung, T. C. (2012). Synthesis and characterization of polyethylene-g-sulfonated polysulfone copolymers for proton exchange membranes. In Polymer Electrolyte Fuel Cells 12, PEFC 2012 (2 ed., pp. 1055-1071). (ECS Transactions; Vol. 50, No. 2). https://doi.org/10.1149/05002.1055ecst