Lithium-Ion Dynamic and Storage of Atomically Precise Halogenated Nanographene Assemblies via Bottom-Up Chemical Synthesis

• DOI: 10.1021/acsami.4c02545
• Publication Date: 2024-05-24T07:33:01Z
• Authors: Febri Baskoro; Hui Qi Wong; Svetozar Najman; Po-Yu Yang; Jazer Jose H. Tog...; Yi-Chi Ho; Mei-Chun Tseng; Der-Lii M. Tzou; Yu-Ruei Kung; Chun-Wei Pao; Hung-Ju Yen
• Keywords: Electronegativity; Surface Modification

Graphene has received much scientific attention as an electrode material for lithium-ion batteries because of its extraordinary physical and electrical properties. However, the lack structural control restacking issues have hindered application carbon-based anode materials next generation batteries. To improve performance, several modification approaches such edge-functionalization electron-donating/withdrawing substitution been considered promising strategies. In addition, group 7A elements recognized critical due to their electronegativity electron-withdrawing character, which are able further electronic properties materials. Herein, we elucidated chemistry nanographenes with edge-substituted battery anodes. The halogenated were synthesized via bottom-up organic synthesis ensure control. Our study reveals that presence halogens on edge not only tunes but also impacts stability, reactivity, Li+ storage capability. Further systematic spectroscopic studies indicate charge polarization caused by halogen atoms could regulate transport, transfer energy, behavior in nanographenes. Overall, this provides a new molecular design nanographene anodes aiming next-generation