Electrospun Silicon Dioxide/poly(vinylidene fluoride) Nanofibrous Membrane Comprising a Skin Multicore-Shell Nanostructure as a New High-Heat-Resistant Separator for Lithium-Ion Polymer Batteries.

ABSTRACT: Porous silicon dioxide (SiO₂)/poly(vinylidene fluoride) (PVdF), SiO₂/PVdF, and fibrous composite membranes were prepared by electrospinning a blend solution of a SiO₂ sol-gel/PVdF. The nanofibers of the SiO₂/PVdF (3/7 wt. ratio) blend comprised skin and nanofibrillar structures which were obtained from the SiO₂ component. The thickness of the SiO₂ skin layer comprising a thin skin layer could be readily tuned depending on the weight proportions of SiO₂ and PVdF. The composite membrane exhibited a low thermal shrinkage of ~3% for 2 h at 200 °C. In the prototype cell comprising the composite membrane, the alternating current impedance increased rapidly at ~225 °C, and the open-circuit voltage steeply decreased at ~1

SUBMITTER: Kim YG 

PROVIDER: S-EPMC11244255 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature