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 m² 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.