Poly(fluorenyl aryl piperidinium) membranes and ionomers for anion exchange membrane fuel cells

• DOI: 10.1038/s41467-021-22612-3
• Publication Date: 2021-04-22T10:16:55Z
• Authors: Nanjun Chen; Ho Hyun Wang; Sun Pyo Kim; Hae Min Kim; Won Hee Lee; Chuan Hu; Joon Yong Bae; Eun Seob Sim; Yong-Chae Chung; Jue-Hyuk Jang; Sung Jong Yoo; Yongbing Zhuang; Young Moo Lee
• Keywords: Ionomer

Abstract Low-cost anion exchange membrane fuel cells have been investigated as a promising alternative to proton for the last decade. The major barriers viability of are their unsatisfactory key components—anion ionomers and membranes. Here, we present series durable poly(fluorenyl aryl piperidinium) membranes where possess high OH − conductivity 208 mS cm −1 at 80 °C, low H 2 permeability, excellent mechanical properties (84.5 MPa TS), 2000 h ex-situ durability in 1 M NaOH while water vapor permeability phenyl adsorption. Based on our rational design ionomers, demonstrate alkaline cell performances 2.34 W −2 -O 1.25 -air (CO -free) °C. can be operated stably under 0.2 A current density ~200 h.