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 2024-01-19T15:05:16Z 2024-01-19T15:05:16Z 2021-09-05 2021-03 2073-4360 https://pubs.kist.re.kr/handle/201004/117319 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. English MDPI Polystyrene-Based Hydroxide-Ion-Conducting Ionomer: Binder Characteristics and Performance in Anion-Exchange Membrane Fuel Cells Article 10.3390/polym13050690 1 POLYMERS, v.13, no.5, pp.1 - 13 POLYMERS 13 5 1 13 Y scie scopus 000628438400001 2-s2.0-85102352563 Polymer Science Polymer Science Article anion-exchange membrane fuel cell polystyrene electrode binder anion-exchange ionomer cell flooding water management