Preparation of porous membrane with graphene oxide for vanadium redox flow battery

Graphene oxide (GO) was functionalized onto both sides of grafted porous polyethylene/polypropylene (PEPP) membrane sheet through sonication and simple immersion. Graphene oxide is a trending material in the field due to its excellent properties such as highly resistant to alkaline/acidic and strong mechanical strength, low cost and easily accessible. PEPP was successfully modified and the fiber gap of PEPP was reduced by grafting with GMA functionalized with GO. With addition of GO, modified PEPP membrane became hydrophilic with the addition of hydrogen bond from the GO. The FTIR results also showed traces of GMA on the surface of PEPP and after functionalized the membrane, it has shown prominent new peak which correspond to the C bond from GO from ultrasonication method.