Cation-selective two-dimensional polyimine membranes for high-performance osmotic energy conversion

被引：87

作者：

Zhang, Zhen ^{[1
,2
,3
,4
,5
]}

Bhauriyal, Preeti ^{[1
,2
]}

Sahabudeen, Hafeesudeen ^{[1
,2
]}

Wang, Zhiyong ^{[1
,2
,3
]}

Liu, Xiaohui ^{[1
,2
]}

Hambsch, Mike ^{[1
,6
]}

Mannsfeld, Stefan C. B. ^{[1
,6
]}

Dong, Renhao ^{[1
,2
]}

Heine, Thomas ^{[1
,2
,7
,8
]}

Feng, Xinliang ^{[1
,2
,3
]}

机构：

[1] Tech Univ Dresden, Ctr Adv Elect Dresden Cfaed, D-01062 Dresden, Germany

[2] Tech Univ Dresden, Fac Chem & Food Chem, D-01062 Dresden, Germany

[3] Max Planck Inst Microstruct Phys, D-06120 Halle, Saale, Germany

[4] Univ Sci & Technol China, Suzhou Inst Adv Res, Suzhou 215123, Jiangsu, Peoples R China

[5] Univ Sci & Technol China, Sch Chem & Mat Sci, Hefei 230026, Anhui, Peoples R China

[6] Tech Univ Dresden, Fac Elect & Comp Engn, D-01062 Dresden, Germany

[7] Helmholtz Ctr Dresden Rossendorf, Inst Resource Ecol, Leipzig Res Branch, Permoserstr 15, D-0416 Leipzig, Germany

[8] Yonsei Univ, Dept Chem, Seoul 120749, South Korea

来源：

NATURE COMMUNICATIONS | 2022年 / 13卷 / 01期

基金：

欧洲研究理事会; 欧盟地平线“2020”;

关键词：

GENERALIZED GRADIENT APPROXIMATION; REVERSE ELECTRODIALYSIS; GRAPHENE; TRANSPORT; DENSITY; RECTIFICATION;

D O I：

10.1038/s41467-022-31523-w

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Two-dimensional (2D) membranes are emerging candidates for osmotic energy conversion. However, the trade-off between ion selectivity and conductivity remains the key bottleneck. Here we demonstrate a fully crystalline imine-based 2D polymer (2DPI) membrane capable of combining excellent ionic conductivity and high selectivity for osmotic energy conversion. The 2DPI can preferentially transport cations with Na+ selectivity coefficient of 0.98 (Na+/Cl (-) selectivity ratio similar to 84) and K+ selectivity coefficient of 0.93 (K+/Cl- ratio similar to 29). Moreover, the nanometer-scale thickness (similar to 70 nm) generates a substantially high ionic flux, contributing to a record power density of up to similar to 53 W m(-2), which is superior to most of nanoporous 2D membranes (0.8-35 W m(-2)). Density functional theory unveils that the oxygen and imine nitrogen can both function as the active sites depending on the ionization state of hydroxyl groups, and the enhanced interaction of Na+ versus K+ with 2DPI plays a significant role in directing the ion selectivity.

引用

页数：9

共 54 条

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