| Hydrothermal Synthesis of NiMoO4-Reduced Graphene Oxide Nanocomposites: An Electrode Material for Supercapacitors |
| Paper ID : 1298-UFGNSM-FULL |
| Authors: |
|
Kian Yousefipour *1, Rasoul Sarraf-Mamoory2, Amin Yourdkhani2 1Gisha Bridge 2Tarbiat Modares University |
| Abstract: |
| A unique and cost effective hydrothermal process was employed for growth of highly crystalline NiMoO4.nH2O nanorods on reduced graphene oxide (rGO) sheets as a cathode material to use in supercapacitors. The structural and morphological properties of the nanocomposites were studied by XRD, FTIR, Raman, BET and FE-SEM analyses. Their supercapacitive behavior was evaluated by cyclic voltammetry and galvanostatic charge-discharge experiments. The results showed that the RGO/NiMoO4.nH2O nanocomposites exhibit a good specific capacitance and a higher stability compared to NiMoO4.nH2O. When used NiMoO4.nH2O as electrodes in electrochemical capacitors, the hierarchical nanorods exhibited excellent electrochemical performances. The specific capacitance of NiMoO4.nH2O and RGO/NiMoO4.nH2O nanocomposites were measured 217 F/g and 361.17 F/g, respectively. The strategy of using rGO in conjugant with NiMoO4.nH2O nanorods increased the specific capacitance by 66% compared to that of pristine NiMoO4.nH2O nanorods. The “sheet on sheet” nanostructures are interconnected each other to form a 3D network structure in the composite, which can provide large surface area and abundant mesopores for the rapid electrons and ions transportation while the composite is used as supercapacitor electrode material. The results indicate that the RGO/NiMoO4.nH2O nanocomposites are very promising for applications in energy storage and other electrochemical devices. The responsible for such a large increase is the coupling of synergetic chemical effects between the conduction and high surface area of rGO networks and the high pseudocapacitance of NiMoO4.nH2O nanorods. |
| Keywords: |
| Hydrothermal Synthesis, Supercapacitor, Hydrated NiMoO4, Nanorods, Reduced Graphene Oxide, Nanocomposites. |
| Status : Paper Accepted (Oral Presentation) |
