Enhanced Cycling Stability of Lithium‐Ion Batteries Using Graphene‐Wrapped Fe3O4‐Graphene Nanoribbons as Anode Materials

A sandwich structured composite of graphene-wrapped Fe3O4-graphene nanoribbons is prepared using a facile and cost-effective approach. The composite demonstrates a high capacity, good rate performance, and greatly improved cycling stability due to the synergistic combination of electrically conductive graphene, graphene nanoribbons, and Fe3O4. The design concept developed mitigates losses that are often seen in nanostructured systems while permitting facile ion access through the material.