| 초록 |
In this study, the direct fluorination on graphite was suggested for high fluorine contents on graphite surface and crystallinity. The prepared graphite were labelled as G-4F (fluorinated graphite at 400 °C) and G-4F-6V (Heat treatment at 600 °C in vacuum after fluorination). From XPS data, after fluorination at 400 °C, 19.1 at.% of fluorine was introduced on graphite. G-4F-6V has 20.0 at.% of fluorine, most of the fluorine remains in G-4F-6V. After fluorination at 400 °C, it can be confirmed that the graphite structure collapses. However, the XRD result of G-4F-6V was similar to graphite structure. In case of the G-4F-6V, despite changing to graphite structure after heat treatment in a vacuum state, high contents of fluorine are present on the surface. It is believed that the fluorinated graphite is recovered to the graphite structure as fluorocarbon exits from the fluorinated graphite while the unstable decomposition gas such as F2 re-reacts with the graphite surface. |
