一个Porphyrin每链自组装螺旋离子交换通道用于超高奥斯莫斯能量转换
Chao Li1,2, Heming Jiang3, Pengxiang Liu1
1Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, P. R. China.
Journal of the American Chemical Society
|May 20, 2022
概括
研究人员开发了一种新的离子交换膜 (IEM), 这种新的膜实现了极高的功率密度以实现高效的透能量转换.
科学领域:
- 材料科学
- 电化学
- 聚合物科学
背景情况:
- 离子交换膜 (IEM) 在逆电透析 (RED) 系统中转化透能量至关重要.
- 提高能量转换效率需要具有高选择性和离子导电性的IEM.
- 一个重要的挑战是导电性和永久选择性之间的权衡,通常是由于膜胀.
研究的目的:
- 设计和制造一种能克服选择性-导电性的离子交换膜.
- 通过提高导电性和选择性来实现透能量转换的高性能.
- 为下一代IEM制定一个简单而经济的战略.
主要方法:
- 使用氨酸核心四星块共聚物 (p-BCP) 制造膜.
- 利用块共聚物自组合和氨酸 π-π 堆叠的协同效应来创建高密度的螺旋氨酸通道.
- 膜性质的表征,包括离子交换能力,选择性和离子导电性.
主要成果:
- 证明了具有异常低的离子交换能力的膜 (∼10−2 mequiv g−1).
- 在50倍的度比率下达到19.3W m-2的超高功率密度.
- 氨酸道具有很高的化物选择性和导电性,对于高效的透能量转换至关重要.
结论:
- 开发的p-BCP膜有效地打破了选择性-导电性权衡.
- 这种新的膜设计为高性能透能量转换提供了有前途的方法.
- 这一战略为新一代高效的离子交换膜铺平了道路.
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