Hierarchical MoSe2 Nanosheets/Reduced Graphene Oxide Composites as Anodes for Lithium-Ion and Sodium-Ion Batteries with Enhanced Electrochemical Performance

The preparation and electrochemical storage behavior of hierarchical MoSe2/reduced graphene oxide (rGO) composites were studied. The preparation was achieved by a facile hydrothermal route. The results show that MoSe2 has a high capacity for lithium ion and sodium ion storage and that the incorporation of rGO has further improved the electrochemical property of MoSe2 effectively. As anode materials for lithium-ion and sodium-ion batteries, the MoSe2/rGO composites demonstrate excellent rate performance and cycling stability of 917 mA h g(-1) after 100 cycles for Li+ storage and 430 mA h g(-1) after 200 cycles for Na+ storage at a current density of 0.5 Ag-1, which is attributed to the robust hierarchical structure and the synergistic effects between MoSe2 nano-sheets and rGO. Therefore, the electrochemical evaluations suggest that the obtained hierarchical structure MoSe2/rGO composites hold great potential as anode materials for lithium-ion and sodium-ion batteries.