MnO-carbon-reduced graphene oxide composite with superior anode Li-ion storage performances

Manganous oxide (MnO)-based composites have motivated extensive researches as an anode electrode for lithium-ion storage due to the high theoretical capacity. Whereas, low cycling stability is the pivotal problem that retards the application of materials. Herein, a hydrothermal-annealing strategy is exploited to obtain the composite materials. The MnO nanoparticles (5-20nm) wrapped by carbon shells to form core-shell structure are supported on the surface of reduced graphene oxide (rGO) sheets. The rGO flakes in electrode materials possess higher electrical conductivity, and improve the electro-conductibility and structural stability during charging-discharging process. Used as anode for lithium-ion batteries, the composite exhibits large reversible specific capacity (866mAhg(-1) at 0.2C after 230cycles) as well as a good cyclicity with a coulombic efficiency of 96%. The hydrothermal-annealing synthetic pathway opens up possibilities for designing and preparing novel electrode materials of lithium or other metallic ion batteries. Manganous oxide (MnO)-based composites have motivated extensive researches as an anode electrode for lithium-ion storage due to the high theoretical capacity. Whereas, low cycling stability is the pivotal problem that retards the application of materials. Herein, a hydrothermal-annealing strategy is exploited to obtain the composite materials. The MnO nanoparticles (5-20nm) wrapped by carbon shells to form core-shell structure are supported on the surface of reduced graphene oxide (rGO) sheets. The rGO flakes in electrode materials possess higher electrical conductivity, and improve the electro-conductibility and structural stability during charging-discharging process. Used as anode for lithium-ion batteries, the composite exhibits large reversible specific capacity (866mAhg(-1) at 0.2C after 230cycles) as well as a good cyclicity with a coulombic efficiency of 96%. The hydrothermal-annealing synthetic pathway opens up possibilities for designing and preparing novel electrode materials of lithium or other metallic ion batteries.