Polystyrene-based hydroxide-ion-conducting ionomer: Binder characteristics and performance in anion-exchange membrane fuel cells

Ji Eon Chae, So Young Lee, Sung Jong Yoo, Jin Young Kim, Jong Hyun Jang, Hee Young Park, Hyun Seo Park, Bora Seo, Dirk Henkensmeier, Kwang Ho Song, Hyoung Juhn Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Polystyrene-based polymers with variable molecular weights are prepared by radical polymerization of styrene. Polystyrene is grafted with bromo-alkyl chains of different lengths through Friedel–Crafts acylation and quaternized to afford a series of hydroxide-ion-conducting ionomers for the catalyst binder for the membrane electrode assembly in anion-exchange membrane fuel cells (AEMFCs). Structural analyses reveal that the molecular weight of the polystyrene backbone ranges from 10,000 to 63,000 g mol−1, while the ion exchange capacity of quaternary-ammonium-group-bearing ionomers ranges from 1.44 to 1.74 mmol g−1 . The performance of AEMFCs constructed using the prepared electrode ionomers is affected by several ionomer properties, and a maximal power density of 407 mW cm−2 and a durability exceeding that of a reference cell with a commercially available ionomer are achieved under optimal conditions. Thus, the developed approach is concluded to be well suited for the fabrication of next-generation electrode ionomers for high-performance AEMFCs.

Original languageEnglish
Article number690
Pages (from-to)1-13
Number of pages13
JournalPolymers
Volume13
Issue number5
DOIs
Publication statusPublished - 2021 Mar 1

Keywords

  • Anion-exchange ionomer
  • Anion-exchange membrane fuel cell
  • Cell flooding
  • Electrode binder
  • Polystyrene
  • Water management

ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics

Fingerprint

Dive into the research topics of 'Polystyrene-based hydroxide-ion-conducting ionomer: Binder characteristics and performance in anion-exchange membrane fuel cells'. Together they form a unique fingerprint.

Cite this