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- Title
Polystyrene-Based Hydroxide-Ion-Conducting Ionomer: Binder Characteristics and Performance in Anion-Exchange Membrane Fuel Cells.
- Authors
Chae, Ji Eon; Lee, So Young; Yoo, Sung Jong; Kim, Jin Young; Jang, Jong Hyun; Park, Hee-Young; Park, Hyun Seo; Seo, Bora; Henkensmeier, Dirk; Song, Kwang Ho; Kim, Hyoung-Juhn; Jeon, Jong Yeob
- 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.
- Subjects
IONOMERS; FUEL cells; ION-permeable membranes; MOLECULAR weights; POWER density; ION exchange (Chemistry); POLYSTYRENE
- Publication
Polymers (20734360), 2021, Vol 13, Issue 5, p690
- ISSN
2073-4360
- Publication type
Article
- DOI
10.3390/polym13050690