题目:
Designing ion-exchange membranes for fuel cells
讲座人:
Prof. Michael D. Guiver
天津大学
内燃机燃烧学国家重点实验室
时间: 2月18日（周四）10:00-11:30
地点: 卢嘉锡202报告厅
报告题目：Designing ion-exchange membranes for fuel cells
报告人：Prof. Michael D. Guiver
State Key Laboratory of Engines, Tianjin University, Tianjin
Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin
报告摘要：
Fuel cells used for automotive applications can be more efficient and have fewer ancillary devices (e.g. humidifier) if they can be operated at slightly higher temperatures than the normal conditions of fully humidified fuel at 80°C. The commercialized perfluorosulfonic acid (PFSA) class of proton exchange membranes (PEMs), a central component of fuel cells, have limitations when operated at higher temperatures of 90-110°C and reduced humidity, such as low glass transition temperature, and high gas (fuel) permeability, and reduced conductivity due to membrane dehydration.
To address some of these challenges, effective polymer architecture has been investigated for efficient ion transport at elevated temperature [1,2]. Several effective approaches include polymer architecture with clustered grafts, tri-block or comb-shaped copolymer architecture with high localized densities of conducting groups have shown an effective combination of high ionic conductivity, while limiting dimensional swelling as ionic content is increased within the polymer structure. The polymer architecture is designed to allow self-organization into hydrophilic proton-conducting domains embedded within hydrophobic domains. Fuel cell data show it is possible to obtain higher power densities than those from PSFA membranes.
Some work on anion exchange membrane design will also be presented.
Apart from fuel cells, ion-conducting polymer membranes have applications in redox flow batteries, electrodialysis, and electrolysers
References
(reviews)
1.N. Li and M. D. Guiver, Macromolecules, 47, 2175−2198 (2014).
2.G. He, Z. Li, J. Zhao, S. Wang, H. Wu, M. D. Guiver, Z. Jiang, Advanced. Materials, 27,5280 – 5295 (2015).