Design of Block-Copolymer Nanoporous Membranes for Robust and Safer Lithium-Ion Battery Separators.

ABSTRACT: Lithium-ion batteries (LIBs) suffer from unsatisfied performance and safety risks mainly because of the separators. Herein, a block copolymer (BCP) composed of robust and electrolyte-affinitive polysulfone (PSF) and Li⁺-affinitive polyethylene glycol (PEG) is rationally designed to prepare a new type of LIB separator. The copolymer is subjected to selective swelling, producing nanoporous membranes with PEG chains enriched along the pore walls. Intriguingly, when used as LIB separators, thus-produced BCP membranes efficiently integrate the merits of both PSF and PEG chains, endowing the separators thermal resistance as high as 150 °C and excellent wettability. Importantly, the nanoporous separator is able to close the pores with a temperature of 125 °C, offering the battery a the

SUBMITTER: Yang H 

PROVIDER: S-EPMC8025019 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature