Rich 1T‐MoS2 Nanoflowers Decorated on Reduced Graphene Oxide Nanosheet for Ultra‐Quick Zn2+ Storage

Abstract Aqueous zinc‐ion batteries (AZIBs) with low cost and high safety are promising energy storage equipment for large‐scale grids. However, the further development of AZIBs is obstructed by finite usability of cathode materials. Recently, layered materials represented by MoS 2 have attracted attentions because they can provide facile two‐dimensional (2D) channels for the diffusion of Zn 2+ , but low capacity and poor rate capability limit their applications. Herein, two classical layered materials are combined to form a stable heterostructure (MoS 2 ‐rGO) by in‐situ growing metallic 1T‐MoS 2 nanoflowers on reduced graphene oxide (rGO) to provide more 2D channels for electrons transfer and Zn 2+ diffusion. The MoS 2 ‐rGO heterostructure exhibits high specific capacity (303.10 mAh g −1 at 0.20 A g −1 ) and ultrahigh rate capability (102.70 mAh g −1 at 20.00 A g −1 , i. e., capacity retention of 33.88 % for a 100‐fold increase in current density) in aqueous electrolyte. Furthermore, the quasi‐solid‐state aqueous zinc‐ion battery based on MoS 2 ‐rGO heterostructure also shows high electrochemical performance at bending states and extreme temperature. This work provides an inspiration for construction of AZIBs with high‐performance layered cathode.