作为纳米发电机的高离子导电性基二维聚合物膜
Xiaohui Liu1, Zhiyong Wang1,2, Qixiang Zhang3,4
1Center for Advancing Electronics Dresden & Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01069, Dresden, Germany.
Angewandte Chemie (International ed. in English)
|July 4, 2024
概括
我们开发了一种新的二维聚合物 (2DP) 膜,用于可持续的透式能量收集. 这种先进的膜通过优化孔径大小和电荷密度来实现高离子流和选择性,以实现高效的离子传输.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 二维聚合物 (2DPs) 和二维共价有机框架 (2D COFs) 显示出对透能量的产生有前途.
- 电流膜由于孔径小,电荷密度低,因此具有较低的离子流和选择性.
研究的目的:
- 开发一种具有增强离子运输特性的2DP膜,以实现高效的透能量收获.
- 通过增加孔径大小和表面电荷密度来克服现有膜的局限性.
主要方法:
- 基于π结合的2DP (V2DP) 膜的制造.
- 孔径大小 (4.5 nm) 和表面电荷密度 (~6 mC m-2) 的表征.
- 测试膜在离子流量,选择性,电流密度和功率密度中的性能.
主要成果:
- V2DP 膜实现了 5.5×103 A m-2.2 的高电流密度.
- 证明了具有理想选择性的显著离子流.
- 在海水与河水混合的场景中,其功率密度为~55 W m−2.
- 高Cl−的转移数为0.70.
结论:
- V2DP膜有效地增强了电双层重叠,并促进了高离子流.
- 优化孔径和高正表面电荷密度对于有效的离子传输至关重要.
- 这项工作突出了2DP膜在先进的透能量转换方面的潜力.
相关概念视频
Potentiometry: Membrane Electrodes
547
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
547
Ion Exchange
573
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
573


