Vanadium Oxides with Amorphous‐Crystalline Heterointerface Network for Aqueous Zinc‐Ion Batteries. (15th February 2023)

• Record Type: Journal Article
• Authors: Wang, Zhihui; Song, Yu; Wang, Jing; Lin, Yulai; Meng, Jianming; Cui, Weibin; Liu, Xiao‐Xia
• Is Part Of: Angewandte Chemie. Volume 135:Number 13(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-02-15
• Subjects: Amorphous -- Heterostructure -- High Performance -- Vanadium Oxide -- Zinc-Ion Battery; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202216290
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Rechargeable aqueous Zn‐VO x batteries are attracting attention in large scale energy storage applications. Yet, the sluggish Zn 2+ diffusion kinetics and ambiguous structure–property relationship are always challenging to fulfil the great potential of the batteries. Here we electrodeposit vanadium oxide nanobelts (VO‐E) with highly disordered structure. The electrode achieves high capacities (e.g., ≈5 mAh cm −2, 516 mAh g −1 ), good rate and cycling performances. Detailed structure analysis indicates VO‐E is composed of integrated amorphous‐crystalline nanoscale domains, forming an efficient heterointerface network in the bulk electrode, which accounts for the good electrochemical properties. Theoretical calculations indicate that the amorphous‐crystalline heterostructure exhibits the favorable cation adsorption and lower ion diffusion energy barriers compared to the amorphous and crystalline counterparts, thus accelerating charge carrier mobility and electrochemical activity of the electrode. Abstract : Vanadium oxide materials with the unique amorphous‐crystalline heterostructure are fabricated using an electrochemical method for the first time. The electrode displays good electrochemical performances as cathode for aqueous Zn‐ion batteries. Experimental and simulation results suggest that the amorphous‐crystalline heterostructure exhibits the favourable cation adsorption and ion diffusion properties compared to other modelling structures.