Chen, Nanjun Wang, Ho Hyun Kim, Sun Pyo Kim, Hae Min Lee, Won Hee Hu, Chuan Bae, Joon Yong Sim, Eun Seob Chung, Yong-Chae Jang, Jue-Hyuk Yoo, Sung Jong Zhuang, Yongbing Lee, Young Moo 2024-01-19T15:02:44Z 2024-01-19T15:02:44Z 2021-10-21 2021-04 2041-1723 https://pubs.kist.re.kr/handle/201004/117189 Low-cost anion exchange membrane fuel cells have been investigated as a promising alternative to proton exchange membrane fuel cells for the last decade. The major barriers to the viability of anion exchange membrane fuel cells are their unsatisfactory key components-anion exchange ionomers and membranes. Here, we present a series of durable poly(fluorenyl aryl piperidinium) ionomers and membranes where the membranes possess high OH- conductivity of 208 mS cm(-1) at 80 degrees C, low H-2 permeability, excellent mechanical properties (84.5 MPa TS), and 2000 h ex-situ durability in 1 M NaOH at 80 degrees C, while the ionomers have high water vapor permeability and low phenyl adsorption. Based on our rational design of poly(fluorenyl aryl piperidinium) membranes and ionomers, we demonstrate alkaline fuel cell performances of 2.34 W cm(-2) in H-2-O-2 and 1.25 W cm(-2) in H-2-air (CO2-free) at 80 degrees C. The present cells can be operated stably under a 0.2 A cm(-2) current density for similar to 200 h. Developing high-performance anion exchange membranes and ionomers is crucial for low-cost alkaline fuel cells. Here, the authors explore rigid and high ion conductive poly(fluorenyl aryl piperidinium) copolymers, extending their applications to anion exchange membrane fuel cells. English Nature Publishing Group Poly(fluorenyl aryl piperidinium) membranes and ionomers for anion exchange membrane fuel cells Article 10.1038/s41467-021-22612-3 1 Nature Communications, v.12, no.1 Nature Communications 12 1 Y scie scopus 000642744500014 2-s2.0-85104758605 Multidisciplinary Sciences Science & Technology - Other Topics Article HIGH-PERFORMANCE WATER TRANSPORT POLYMER DURABILITY MORPHOLOGY