S-MnO2/Graphene composites with high electrochemical properties as cathode of aqueous zinc-ion battery

•The S-MnO2/Graphene was prepared by a one-step hydrothermal method.•The electrochemical properties of S-MnO2/Graphene are superior to MnO2.•The S-MnO2/Graphene cathode obtains a specific capacity of 121.2 mAh g−1 at 1 A/g after 5000 cycles.•Sulfur and graphene are combined with MnO2 as AZIBs cathode with good electrochemical performance.