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

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 and Young Moo Lee ()
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Nanjun Chen: Hanyang University
Ho Hyun Wang: Hanyang University
Sun Pyo Kim: Hanyang University
Hae Min Kim: Hanyang University
Won Hee Lee: Hanyang University
Chuan Hu: Hanyang University
Joon Yong Bae: Hanyang University
Eun Seob Sim: Hanyang University
Yong-Chae Chung: Hanyang University
Jue-Hyuk Jang: Korea Institute of Science and Technology (KIST)
Sung Jong Yoo: Korea Institute of Science and Technology (KIST)
Yongbing Zhuang: Chinese Academy of Sciences
Young Moo Lee: Hanyang University

Nature Communications, 2021, vol. 12, issue 1, 1-12

Abstract: Abstract 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 °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.

Date: 2021
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DOI: 10.1038/s41467-021-22612-3

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