材料科学
膜
离子键合
共价键
化学工程
缓压渗透
离子电导率
渗透力
功率密度
电导率
功率(物理)
化学物理
纳米技术
电解质
离子
热力学
有机化学
电极
物理化学
化学
反渗透
工程类
物理
正渗透
生物化学
作者
Zhuozhi Lai,Haitao Su,Weipeng Xian,Qing Guo,Qingwei Meng,Di Wu,Sai Wang,Qi Sun
标识
DOI:10.1002/aenm.202405045
摘要
Abstract The advancement of nanofluidic membranes is critical for mimicking bioelectrogenic ion‐channel mechanisms and boosting output power density, essential for sustainable energy applications. The energy conversion efficiency of these devices significantly relies on the ion conductivity and permselectivity of the membranes. Membranes with aligned one‐dimentional (1D) pores, high pore density, and organized dangling ionic groups are theorized to offer superior ion permeability and selectivity, yet these configurations remain significantly underexplored. Herein, the successful fabrication of oriented ionic covalent organic framework (COF) membranes is presented. These membranes exhibit precisely aligned cationic and anionic sites within their pore channels, achieved through post‐synthetic modification using click chemistry, which shows high ion permselectivity and conductivity. When incorporated into full‐cell thermo‐osmotic generators, these membranes deliver an impressive output power density of 195 W m −2 under a 50‐fold salinity gradient (NaCl: 0.01 m ‖ 0.5 m ‖ 0.01 m ) along with a 35 K temperature differential. This power output substantially increases 2.41 times to 471 W m −2 when the salinity gradient is enhanced tenfold, surpassing the performance of existing nanofluidic membranes under similar conditions and thus offering a promising avenue for enhancing efficiency in energy and resource utilization.
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