Three-dimensional reduced graphene oxide/MnO composite architectures as a high-rate anode for lithium storage

Integrating metal oxides into three-dimensional (3D) reduced graphene oxide (rGO) is beneficial to exploit high-performance anodes for lithium storage. Herein, we design two self-assembly processes to prepare 3D rGO/MnO gel (3D rGO/MnO-G) involving initial self-assembly loading of Mn3O4 nanocrystals on GO and following self-assembly of gel along with the reduction of Mn3O4 to MnO. Due to the interconnected porous network structure and intimate contact between MnO and rGO, as well as sufficient buffer space for lithium storage, the 3D rGO/MnO-G shows excellent electrochemical performance with a discharge capacity of 920.8 mA h g(-1) at a current density of 0.5A g(-1) after 100 cycles and superior rate capability of 600.1 mA h g(-1) at 3.2 A g(-1).