锂(药物)
膜
渗透
离子
化学
扩散
萃取(化学)
电解质
导线
化学工程
材料科学
无机化学
色谱法
有机化学
复合材料
热力学
电极
医学
生物化学
物理
物理化学
工程类
内分泌学
作者
Hongyu Ma,Yun Xia,Zhouyou Wang,Tongwen Xu,George P. Simon,Huanting Wang
标识
DOI:10.1021/acs.est.3c05935
摘要
The development of energy-efficient and environmentally friendly lithium extraction techniques is essential to meet the growing global demand for lithium-ion batteries. In this work, a dual-channel ion conductor membrane was designed for a concentration-driven lithium-selective ion diffusion process. The membrane was based on a porous lithium-ion conductor, and its pores were modified with an anion-exchange polymer. Thus, the sintered lithium-ion conductors provided highly selective cation transport channels, and the functionalized nanopores with positive charges enabled the complementary permeation of anions to balance the transmembrane charges. As a result, the dual-channel membrane realized an ultrahigh Li+/Na+ selectivity of ∼1389 with a competitive Li+ flux of 21.6 mmol·m-2·h-1 in a diffusion process of the LiCl/NaCl binary solution, which was capable of further maintaining the high selectivity over 7 days of testing. Therefore, this work demonstrates the great potential of the dual-channel membrane design for high-performing lithium extraction from aqueous resources with low energy consumption and minimal environmental impact.
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