| 초록 |
The electric double layer capacitor(EDLC) is an electrochemical capacitor storing electric energy by charging the electric double layer on a nanoporous carbon electrode such as activated carbon. Graphene is often suggested as a replacement for activated carbon in EDLC, in part due to its high relative surface area. In addition, graphene-based capacitors are expected to have high ionic conductivity, good thermal stability, good mechanical strength and excellent chemical stability. However, since graphene is difficult to produce and handle, rGO, which can be treated with a solution, is being studied as a substitute. Recently, many researches on the hybridization of rGO and Ni foam, which is a conventional electrode material, to EDLC electrodes have been carried out. This research introduces a method for manufacturing rGO / Ni composite materials for EDLC electrode by hydrothermal synthesis and electrospray deposition. In this experiment, the microstructure and specific surface area of composite materials were controlled by using temperature and time as parameters. Accordingly, the increase of surface area through the synthesis of nickel structure and rGO, which are metallic materials, is confirmed by BET measurement and SEM images. Meanwhile, X-ray diffraction (XRD), and Raman spectroscopy were used to confirm the reduction of graphene oxide. |
