Graphene quantum dots decorated on chromium oxide and zirconium metal-organic framework composite (GQDs@Zr-MOF/Cr2O3) for asymmetric supercapacitors and hydrogen production

The supercapattery is a cutting-edge energy storage technology that combines the higher energy density of batteries with the superior power density and rate capability of supercapacitors. A new class of porous materials known as metal organic framework (MOF) is produced by the robust connections that form between metal ions and organic linkers. MOFs can exhibit exceptional chemical stability, a huge pore volume, and a very high surface area by carefully selecting their constituents. In this article, we present a hybrid composite of chromium oxide and zirconium metal organic framework embedded with graphene quantum dots (GQDs@Zr-MOF/Cr2O3) composite. In asymmetric supercapacitor configuration (GQDs@Zr-MOF/Cr2O3//A.C), the hybrid device reached a maximum Qs of 247C/g at 1.0 A/g. The GQDs@Zr-MOF/Cr2O3//A.C device reached a noteworthy power density of 850. W/kg and a maximum energy density of 61.44 Wh/kg. The device can exhibits remarkable 87 % cycle stability after 10,000 cycles. The hybrid material is appropriate and prospective for use in industrial settings as a supercapattery electrode material because of these remarkable properties.