Characteristic of Nanofiber PVA-Graphene Oxide (GO) as Lithium Battery Separator

Abstract

Batteries have many uses, so a lot of research on batteries has been developed. The part of the battery that has not been studied much is the separator, which has a crucial role as one of the battery components. The separator is the main component in the lithium-ion battery, which functions to prevent short circuits, transport free ions, and isolate electricity. The separator must have adequate porosity, high conductivity, and good thermal stability. The purpose of this research is to analyze the characteristics of the nanofiber membrane, which will be applied as a separator in lithium batteries. The material that can meet the characteristics of the battery separator is PVA-GO nanofiber. Graphene oxide was synthesized using Hummer's method, while PVA-GO nanofiber was synthesized by electrospinning. The characterization of the separator includes conductivity, impedance, and porosity tests. The GO variations given to PVA were 0.1, 0.2, 0.3 and 0.4 gr. The resulting fiber diameter ranges from 162-194 nm, with the smallest fiber diameter being 0.2 gr GO. Nanofiber with characteristics as a membrane for separators is PVA-GO 0.4 gram, with an electrical conductivity value of 5.91×10-4 S/cm and a porosity of 42%.