Anion Exchange Membranes: Enhancement by Addition of Unfunctionalized Triptycene Poly(Ether Sulfone)s

作者：Kim Yoonseob; Moh Lionel C H; Swager Timothy M

来源：ACS Applied Materials & Interfaces, 2017, 9(49): 42409-42414.

DOI：10.1021/acsami.7b13058

• anion exchange membrane
• triptycene copolymer
• phase separation
• hydroxide conductivity
• mechanical property

Anion exchange membrane fuel cells are a clean and efficient promising future energy source. However, the development of stable highperformance membranes remains a major challenge. Herein we demonstrate that the addition of unfunctionalized triptycene poly(ether sulfones) into 1methylimidazolium poly(ether sulfone) enhances membrane's conductivity (up to 0.082 S/cm at 80 degrees C), minimizes dimensional changes over temperatures from 20 to 80 degrees C, and enhances stability with 30% of the initial conductivity maintained after 450 h. These enhancements appear to be the result of nanophase separation and internal free volume. Small angle X-ray scattering and transmission electron microscopy reveal that the internal domain size increases (up to 7.44 nrn) with increasing triptycene fraction.

• 出版日期2017-12-13