Capacity-enhanced and kinetic-expedited zinc-ion storage ability in a Zn3V3O8/VO2 cathode enabled by heterostructural design. Issue 40 (26th September 2022)

• Record Type: Journal Article
• Authors: Yang, Linyu; Jian, Jikang; Wang, Shuying; Wang, Shiyu; Abliz, Ablat; Zhao, Fengjun; Li, Haibing; Wu, Jiadong; Wang, Yujian
• Is Part Of: Dalton transactions. Volume 51:Issue 40(2022)
• Page Start: 15436
• Page End: 15445
• Publication Date: 2022-09-26
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt02220f
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A Zn3 V3 O8 /VO2 heterostructure with abundant phase boundaries was designed as an advanced cathode for aqueous zinc-ion batteries. Abstract : Heterostructured double-phase composites are promising electrode candidates for high-performance secondary metal batteries due to their superior capacity and ion transfer kinetics compared with the pristine phase. Herein, a Zn3 V3 O8 /VO2 (ZVO/VO) heterostructure with abundant phase boundaries was designed as the cathode for aqueous zinc-ion batteries (ZIBs). The preparation method is based on a solid pre-intercalation approach, and the Zn content in the ZVO/VO heterostructure can be precisely controlled. The electrochemical performance of ZVO/VO containing different amounts of Zn, pristine ZVO, and VO phases was compared. ZVO/VO showed superior capacity and cycling stability compared to pristine ZVO and VO. The ZVO/VO heterostructure showed a capacity of 328.4 mA h g −1 at 0.3 A g −1 after 200 cycles. The long-term cycling performance of ZVO/VO was evaluated at 3 A g −1, and it delivered a capacity retention of 90.5% after 1000 cycles. The ion storage mechanism of the ZVO/VO electrode was analyzed by ex situ X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). This work provides a simple strategy for designing vanadium-based heterostructure composites as advanced cathodes for ZIBs.