$$\hbox {Mn}_{3}\hbox {O}_{4}$$ Mn 3 O 4 Nanosheet and GNS– $$\hbox {Mn}_{3}\hbox {O}_{4}$$ Mn 3 O 4 Composite as High-Performance Anode Materials for Lithium-Ion Batteries

Abstract

Nanostructured transitional metal oxides have received more and more attention as the electrode materials for lithium-ion batteries to achieve high specific capacity and good safety performance. In this paper, a graphene nanosheet-supported $$\hbox {Mn}_{3}\hbox {O}_{4}$$ nanoparticles ( $$\hbox {Mn}_{3}\hbox {O}_{4}$$ –GNS) composite, as well as $$\hbox {Mn}_{3}\hbox {O}_{4}$$ nanosheet, were synthesized via a facile hydrothermal method. The $$\hbox {Mn}_{3}\hbox {O}_{4}$$ –GNS composite exhibits good electrochemical performances with high reversible specific capacity (an initial charge capacity of 969 mAh $$\hbox {g}^{-1}$$ at 93.6 mA $$\hbox {g}^{-1}$$ ), good cycling stability (a retained capacity of 646 mAh $$\hbox {g}^{-1}$$ after 60 cycles) and rate capability when used as the anode material for LIBs. The enhanced electrochemical performance could be attributed to the nanoscaled particles of $$\hbox {Mn}_{3}\hbox {O}_{4}$$ , the buffer and confine effects of graphene nanosheets (GNSs) and the distinctive synergistic effect between two components of GNS and metal oxides.