Laminated electrolyte membrane and produce method, and Redox flow battery including electrolyte membrane

摘要

PURPOSE: A manufacturing method of a graphene oxide coating material provides a graphene oxide coating material capable of preventing the penetration of vanadium ion by being applied to a nafion membrane which is an ion exchange film. CONSTITUTION: A manufacturing method of a graphene oxide comprises a step of manufacturing a graphene oxide from a graphite as a starting material; a step of putting the graphene oxide into a distilled water, applying ultrasonic waves in an ultrasonic waves reactor to form a graphene oxide dispersion solution; and a step of mixing a graphene oxide dispersion and nafion solution to manufacture a coating solution by applying ultrasonic waves to the mixture in the ultrasonic waves reactor.