New graphene material makes supercapacitors rival lead-acid batteries

Engineers at Monash University have developed a novel graphene-based material, called multiscale reduced graphene oxide (M-rGO), that enables supercapacitors to achieve energy storage comparable to lead-acid batteries while delivering power at much faster rates. This breakthrough addresses a longstanding limitation in supercapacitors, which traditionally store charge electrostatically but have had lower energy density due to inefficient use of carbon materials’ surface area. By applying a rapid thermal annealing process to natural graphite, the researchers created highly curved graphene structures with optimized ion pathways, resulting in devices that combine high energy density (up to 99.5 Wh/L) with exceptional power density (up to 69.2 kW/L) and excellent cycle stability. The new M-rGO material is compatible with scalable production methods and leverages abundant Australian graphite resources, making it promising for commercialisation. Monash spinout Ionic Industries is already producing commercial quantities of this graphene material and collaborating with energy storage partners to bring the technology to market