A facile non-solvent induced phase separation process for preparation of highly porous polybenzimidazole separator for lithium metal battery application.

ABSTRACT: The drawbacks of low porosity, inferior electrolyte wettability, low thermal dimensional stability and permissive lithium dendrite growth of the conventional microporous polyolefin-based separators hinder their widely application in the high power density and safe Lithium ion batteries. Herein, highly porous polybenzimidazole-based separator is prepared by a facile non-solvent induced phase separation process (NIPS) using water, ethanol, chloroform and ethyl acetate as the coagulation bath solvent, respectively. It was found that the ethanol is suitable to fabricate uniform morphology macroporous separator with the porosity of 92%, electrolyte uptake of 594 wt.%, and strong mechanical strength of 15.9 MPa. In addition, the experimental tests (electrochemical analysis and XPS test) and dens

SUBMITTER: Wang J 

PROVIDER: S-EPMC6917766 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature