Synthesizing 1D Molybdenum/2D Vanadium-Based Heterostructures for Zinc Batteries

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Heterostructure materials with synergistic effects, abundant heterointerfaces, and excellent structural stability are promising for the development of advanced aqueous zinc batteries. Among them, one-/two-dimensional (1D/2D) heterostructures can combine the unique advantages of 1D and 2D materials. Herein, a series of 1D molybdenum/2D vanadium-based heterostructures are controllably constructed via the wet chemical process followed by thermal treatment. First, the controlled synthesis of 1D/2D heterostructures composed of 1D molybdenum trioxide (MoO 3 ) nanobelts and 2D hydrated vanadium pentoxide (V 2 O 5 ·1.6H 2 O) nanosheets is achieved. Experimental analyses and theoretical calculations reveal that the 1D (MoO 3 ) 1 /2D (V 2 O 5 ·1.6H 2 O) 1 heterostructure (the component molar ratio: 1:1) exhibits superior electrochemical performance when used as the cathode for aqueous zinc-ion batteries. Then, using the 1D (MoO 3 ) 1 /2D (V 2 O 5 ·1.6H 2 O) 1 heterostructure as the precursor, via in situ topological transformation, a series of 1D/2D heterostructures including 1D (MoS 2 ) 1 /2D (V 2 O 3 ) 1, 1D (MoN) 1 /2D (V 2 O 3 ) 1, 1D (MoO 2 @MoO 3 ) 1 /2D (V 2 O 3 ) 1, and 1D (MoO 3 ) 1 /2D (V 6 O 13 @V 2 O 5 ) 1 are successfully synthesized. The 1D (MoS 2 ) 1 /2D (V 2 O 3 ) 1 heterostructure facilitates iodine cathode conversion and suppresses the polyiodide shuttle in aqueous zinc–iodine batteries. The controlled construction of 1D/2D heterostructures presents opportunities for energy storage and conversion applications, such as next-generation battery active materials and high-performance catalytic materials.