writer：Nanjun Chen, et al.
keywords：Poly(fluorenyl aryl piperidinium); membranes; anion exchange membrane fuel cells
source：期刊
specific source：NATURE COMMUNICATIONS, 2021, 12:2
Issue time：2022年

Low-cost anion exchange membrane fuel cells have been investigated as a promising alter-

native 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(fluor-

enyl aryl piperidinium) ionomers and membranes where the membranes possess high OH?

conductivity of 208 mS cm?1 at 80 °C, low H2 permeability, excellent mechanical properties

(84.5 MPa TS), and 2000 h ex-situ durability in 1 M NaOH at 80 °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 H2-O2 and 1.25 W cm?2 in H2-air (CO2-free) at 80 °C. The

present cells can be operated stably under a 0.2 A cm?2 current density for ~200 h.