Enhancing Electrochemical Performance of Aluminum‐Ion Batteries with Fluorinated Graphene Cathode

Abstract

AbstractIn pursuit of high‐performance aluminum‐ion batteries, the selection of a suitable positive electrode material assumes paramount importance, and fluorinated graphene (FG) nanostructures have emerged as an exceptional candidate. In the scope of this study, a flexible tantalum foil is coated with FG to serve as the positive electrode for aluminum‐ion batteries. FG positive electrode demonstrates a remarkable discharge capacity of 109 mA h g−1 at a current density of 200 mA g−1, underscoring its tremendous potential for energy storage applications. Concurrently, the FG positive electrode exhibits a discharge capacity of 101 mA h g−1 while maintaining an impressive coulombic efficiency of 95 % over 300 cycles at a current density of 200 mA g−1, which benefiting from the significant structure of FG. The results of the in‐situ Raman spectroscopy signified the presence of intercalation/de‐intercalation processes of AlCl4− behavior within the FG layers.