Lee, Y.-K. Lee, C.-H. Kang, G.-S. Eom, K. Cho, S.Y. Lee, S. Joh, H.-I. 2024-01-19T13:30:31Z 2024-01-19T13:30:31Z 2022-01-10 2021-11-17 1944-8244 https://pubs.kist.re.kr/handle/201004/116120 Fluorine (F) atoms with the highest electronegativity and low polarizability can easily modify the surface and composition of carbon-based electrode materials. However, this is accompanied by complete irreversibility and uncontrolled reactivity, thus hindering their use in rechargeable electronic devices. Therefore, understanding the electrochemical effects of the C-F configuration might lead to achieving superior electrochemical properties. Here, we demonstrate that the fluorinated and simultaneously reduced graphene oxide (FrGO) was easily synthesized through direct gas fluorination. The as-prepared 11%-FrGO electrode exhibited a high capacity (1365 mAh g-1 at 0.1 A g-1), remarkable rate capability, and good stability (64% retention after 1000 cycles at 5 A g-1). Furthermore, the annealed FrGO (11%-FrGO(A)) electrode in which the C-F bond configurations were controlled by facile thermal treatment shows long-term stability (80% retention after 1000 cycles at 5 A g-1). Above a certain content, F atoms enhance Li-ion adsorption and electron transfer, accelerate Li-ion diffusion, and facilitate the formation of a solid electrolyte interphase layer. In particular, the C-F configuration plays a significant role in retaining the capacity under harsh recharging conditions. The results in this study could provide valuable insights into the field of rechargeable devices. ？ English American Chemical Society Understanding an exceptionally fast and stable li-ion charging of highly fluorinated graphene with fine-controlled C-F configuration Article 10.1021/acsami.1c13811 1 ACS Applied Materials & Interfaces, v.13, no.45, pp.53767 - 53776 ACS Applied Materials & Interfaces 13 45 53767 53776 scie scopus 000726631400005 2-s2.0-85119256564 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article DOPED GRAPHENE ENERGY-STORAGE ANODE MATERIAL OXIDE PERFORMANCE REDUCTION ELECTRODES BATTERY FUNCTIONALIZATION MECHANISM anode energy storage systems fluorine functionalization graphene