Constructing Mechanical Shuttles in a Three‐dimensional (3D) Porous Architecture for Selective Transport of Lithium Ions
Abstract
Lithium (Li) extraction from brines is a major barrier to the sustainable development of batteries and alloys; however, current separation technology suffers from a trade‐off between ion selectivity and permeability. Herein, a crown ether mechanically interlocked 3D porous organic framework (Crown‐POF) was prepared as the porous filler of thin‐film nanocomposite membranes. Crown‐POF with penta‐coordinated (four Ocrown atoms and one Ntert‐amine atom) adsorption sites enables a special recognition for Li+ ion. Moreover, the four Ntert‐amine atoms on each POF branch facilitate the flipping motion of Li+ ion along the skeletal thread, while retaining the specified binding pattern. Accordingly, the crown ether interlocked POF network displays an ultrafast ion transfer rate, over 10 times that of the conventional porous materials. Notably, the nanocomposite membrane gives high speed and selectivity for Li+ ion transport as compared with other porous solid‐based mixed‐matrix membranes.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 12, 2023
- Source ID
- 10.1002/ange.202216549
Entities
People
- Cheng Zhang
- Fuli Cai
- Guangshan Zhu
- Huanhuan Li
- Jiahui Feng
- Xianghui Ruan
- Xujiao Ma
- Yajie Yang
- Ye Yuan
- Yue Zheng
- Yuzhang Zhu
Organizations
- Defense Advanced Research Projects Agency
- National Natural Science Foundation of China
- Northeast Normal University