This technology involves forming a coating layer on the surface or within a porous substrate that contains a PVdF-HFP copolymer and graphene oxide bonded with lithium ions. This enhances both ion mobility and thermal/mechanical stability.
Conventional polyolefin separators suffer from thermal shrinkage at high temperatures and insufficient mechanical strength. Furthermore, simple graphene oxide coating methods have limitations in terms of weak adhesion to the substrate and restricted improvements in ion permeability.
This technology creates a coating layer by dispersing graphene oxide, which is cation-pi bonded with lithium ions, within a PVdF-HFP copolymer matrix. It increases lithium-ion mobility in the electrolyte through repulsion and electrical affinity, while also controlling nano/micro-pore structures. Applicable to electrochemical devices like high-output EV batteries, fast-charging pouch cells, and supercapacitors, it boosts high-rate charge/discharge performance and high-temperature dimensional stability with only a small amount of graphene oxide.
This invention was developed with support from the Ministry of Science, ICT and Future Planning for the development of organic environmental pollutant-reducing photoelectrochemical hydrogen production.
N/A
