Randomly oriented covalent organic framework membrane for selective Li⁺ sieving from other ions.

ABSTRACT: Certain biological channels exhibit remarkable selectivity, effectively distinguishing between competing cations. If artificial membranes could achieve similar precision in differentiating competing ions from Li⁺, it could advance sustainable technologies in lithium extraction. In this study, we present a covalent organic framework (COF) membrane featuring a randomly oriented structure that enables selective separation of major competing ions from Li⁺. The random orientation results in narrow pores, which impart size-based selectivity among alkaline ions. Additionally, the COF incorporates sulfonic groups that preferentially bind to Na⁺ and K⁺, facilitating their transport while retaining Li⁺. These synergistic mechanisms endow the mem

SUBMITTER: Bao S 

PROVIDER: S-EPMC12022084 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature