Nanoporous UHMWPE Membrane Separators for Safer and High-Power-Density Rechargeable Batteries.

ABSTRACT: Battery safety has been of critical concerns and there are renewed interest in developing safer membranes for enhancing the inherent safety of lithium ion batteries. In this paper, the synthesis of a robust and safer self-reinforced composite ultrahigh molecular weight polyethylene (UHMWPE) membrane is described. The self-reinforced composite membrane consists of ≈200 nm nanopores homogeneously embedded inside interpenetrating nanofibrillar "shish kebab" networks. It performs thermal fuse function by selectively melting its kebab crystals while the elongated shish fibrillary backbones remain intact. Simulated thermal fuse function tests show that the newly prepared separator displays a 300% increase in tensile strength (550 MPa), 300% increase in puncture resistance (1.5 N μm^-1)

SUBMITTER: Li R 

PROVIDER: S-EPMC6607144 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature