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 1216 mAh g −1 at a current density of 500 mA g −1 after 100 cycles, a superior rate performance of 558 mAh g −1 at 8000 mA g −1 , as well as ultralong cycle life up to 900 cycles. In addition, if performed in the temperature range of 5 to 45 °C, the Zn‐Mn‐O/G anode demonstrates specific capacities between 748 and 1245 mAh g −1 after 100 cycles.