Enhancing the alkaline stability of anion exchange membranes

Significance Statement

Here in Chongqing University, China, Prof. Zidong Wei’s group reported a general strategy to enhance the alkaline stability of anion exchange membranes. Anion exchange membranes are commonly used in alkaline fuel cells where the working condition are strong basic. However, anion exchange membranes, which contain organic N-containing ion exchange sites that will be attacked by OH- ions, will decompose easily.

In this report, Prof. Wei’s team designed a polymer structure that can capture OH- reversely by carbonyl groups, which provide structural protection to N-containing groups. The called “Rat trap effect” makes the anion exchange membrane can retain 95% of their initial conductivities after immersed in 1 M NaOH solution for 10 days.

enhance alkaline stability of anion exchange membranes-Advances in Engineering

About The Author

Prof. Wei received a B.S. in Material Chemistry at Shaanxi University of Science and Technology (Xi’an, China) in 1984 and a Ph.D degree in Applied Chemistry at Tianjin University (Tianjin, China) in 1994. He joined the faculty of School of Chemistry and Chemical Engineering, Chongqing University in 1997 as a professor, and approved as Cheung Kong Scholar Chair Professor of Department of Chinese Education in 2009.

His primary research interests are focused on sustainable energies, including fuel cells, water electrolysis and Li-Sulphur batteries. He has published over 160 papers in peer-reviewed journals, which have been cited over 5000 times.

About The Author

Dr. Cunpu Li received a B.S. in Chemistry (2008) and a Ph. D degree in Material science (2015) at Tsinghua University (Beijing, China). He joined the School of Chemistry and Chemical Engineering, Chongqing University as a lecturer in 2015. After joining Prof. Wei’s group, he is currently focused on the development of anion exchange membranes in fuel cells and separators in Li-Sulphur battery.

About The Author

Jiajia Chen received a B.S. in Chemistry at China West Normal University (Nanchong, China) in 2015. He is currently pursuing his master degree under the supervision of Prof. Li Li at School of Chemistry and Chemical Engineering, Chongqing University. His research interests are anion exchange membranes in fuel cells and molecular dynamics.

Reference

Yuma Takida, Kouji Nawata, Safumi Suzuki, Masahiro Asada, and Hiroaki Minamide. Nonlinear optical detection of terahertz-wave radiation from resonant tunneling diodes. Vol. 25, No. 5 | 6 Mar 2017 | OPTICS EXPRESS 5390.

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