Micro-/Mesoporous Zinc-Manganese Oxide/Graphene Hybrids with High Specific Surface Area: A High-Capacity, Superior-Rate, and Ultralong-Life Anode for Lithium Storage

Hierarchical porous mixed metal oxide/graphene two-dimensional nanostructures, providing an extra active position for lithium storage, represent a hopeful platform for next-generation anode materials. Herein, we report a facile approach to synthesize micro-/mesoporous zinc-manganese oxide/graphene (Zn-Mn-O/G) hybrids with a specific surface area of 227.6 m(2)g(-1) in a water/ethanol mixed solvent. Owing to the micro-/mesoporous structure, large specific area, and strongly coupled effects between Zn-Mn-O and the graphene sheets, the hybrids deliver a high capacity of 1216mAhg(-1) at a current density of 500 mAg(-1) after 100cycles, a superior rate performance of 558mAhg(-1) at 8000 mAg(-1), as well as ultralong cycle life up to 900 cycles. In addition, if performed in the temperature range of 5 to 45 degrees C, the Zn-Mn-O/G anode demonstrates specific capacities between 748 and 1245 mAhg(-1) after 100 cycles.