High performance, pH-resistant membranes for efficient lithium recovery from spent batteries.

ABSTRACT: Cation separation under extreme pH is crucial for lithium recovery from spent batteries, but conventional polyamide membranes suffer from pH-induced hydrolysis. Preparation of high performance nanofiltration membranes with excellent pH-resistance remains a challenge. Here we synthesize a high performance nanofiltration membrane (1,4,7,10-Tetraazacyclododecane (TAD)-1,3,5-Tris(bromomethyl)benzene (TBMB) thin film composite membranes (TFCMs)) with excellent pH-stability through interfacial quaternization reaction between TAD and TBMB. Due to the high stability of "C-N" bonds in TAD-TBMB TFCMs, its separation performance is stable even after 70 days immersion in concentrated acid (3 M H₂SO₄, HNO₃, or HCl) and base (3 M NaOH), which is at least 15 times more st

SUBMITTER: Su Y 

PROVIDER: S-EPMC11603373 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature