▎ 摘　　要

In this work, we report a new type of aqueous sodium-ion batteries employing Na4Mn9O18/carbon nanotube/ reduced graphene oxide (NMO/CNT/RGO) composite as a cathode material while zinc metal as anode material. The NMO/CNT/RGO composites are prepared by a spray drying method and possess a microsphere structure. Addition of RGO and CNT significantly improve the electrical conductivity of NMO composite materials. A stable network skeleton structure was formed in the interior and was beneficial to relieve stress and strain caused due to sodium ion movement and significantly improve the electrochemical performance of cathode materials. The initial reversible discharge specific capacity of the ternary composite electrode is 96.2 mAh g(-1) at 4 C, and retained 68% capacity after 150 cycles (discharge capacity 65.8 mAh g(-1)) NMO/CNT/RGO composites have an excellent rate performance and high cycle capacity.