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Updated: Sep 13, 2026

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
Published on: July 20, 2021
Enhanced Dipolar Interaction Combined with Rigid-Flexible Side Chains for Promoting the Performance of Anion Exchange
Chunlan Lin1, Yiting Liu1, Xurui Li1
1Key Laboratory of Applied Surface and Colloid Chemistry (MOE), International Joint Research Center of Shaanxi Province for Photoelectric Materials Science, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an710119, P. R. China.
Abstract:
Anion exchange membrane (AEM) performance is essential to fuel cell operation as it is the main component of anion exchange membrane fuel cells (AEMFCs). The development of advanced AEMs featuring efficient hydroxide conductivity and excellent alkali resistance holds substantial importance for the development of AEMFC. In this paper, a series of poly(carbazole-isatin)-based AEMs featuring different side chain structures are designed, aiming to explore the influence of different cation-dipole interaction strengths acting on flexible and "rigid-flexible" side chains on the overall membrane performance. Among them, membrane QCI-2O/8CF exhibits the best performance, as evidenced by a hydrophilic channel size of 4.49 nm from small-angle X-ray scattering testing, a hydroxide ionic conductivity of 166.25 mS cm-1 at 80 °C, and a conductivity retention of 90.71% after being immersed in 2 M NaOH solution at 80 °C for 1200 h. The fuel cell result shows that QCI-2O/8CF attains a peak power density of 695.24 mW cm-2 and its voltage decay rate is 0.47 mV h-1 after 60 h under a constant current density of 100 mA cm-2. This research will broaden the design directions of AEMs and promote the further development of AEMFC technology.
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