Crystalline porous framework-based membrane as a sub-nanometer platform for lithium extraction

Lithium resource acquisition is becoming an increasingly pressing issue due to the increasing consumption of lithium batteries. Lithium extraction from salt-lake brine is a promising approach, especially with the sub-nanometer membrane separation technology. Crystalline porous framework materials have emerged as promising sub-nanometer platforms for lithium extraction due to their reticular chemistry features, the highly tunable open channel makes it the optimal medium for studying the transport mechanism of lithium ions. This review outlines the recent advances based on the pore engineering strategies in crystalline porous framework-based membrane technology for lithium extraction, such as pore size regulations, pore surface modifications, and pore space modifications. Furthermore, the challenges, future trends, and prospects of crystalline porous framework-based membrane for lithium extraction are also discussed.