▎ 摘　　要

We report a novel in-situ symbiosis method to prepare reduced graphene oxide wrapped Mn3O4 nanoparticles (rGO/Mn3O4) with uniform size about 50 nm as anodes for lithium-ion batteries (LIBs), which can simplify the preparation process and effectively reduce pollution. The rGO/Mn3O4 nanocomposite exhibited a reversible specific capacity of 795.5 mAh g-1 at 100 mA g-1 after 200 cycles (capacity retention: 87.4%), which benefits from the unique structural advantages and the synergistic effect of rGO and Mn3O4. The Mn3O4 nanoparticles encapsulated among the rGO nanosheets exhibited good electrochemical activity, and the multilayer wrinkled rGO sheets provided a stable 3D conduction channel for Li+/e- transport. The rGO/Mn3O4 nanocomposite is a promising anode candidate for advanced LIBs with excellent cycling performance and rate performance. Furthermore, this new preparation method can be extended to green and economical synthesis of advanced graphene/manganese-based nanocomposites.