Metallic vanadium trioxide intercalated with phase transformation for advanced aqueous zinc-ion batteries

• Published in: Journal of energy chemistry 2021-10, Vol.61, p.594-601
• Main Authors: Hu, Kang, Jin, Danqing, Zhang, Yao, Ke, Longwei, Shang, Huan, Yan, Yan, Lin, Huijuan, Rui, Kun, Zhu, Jixin
• Format: Article
• Language: English
• Subjects: Aqueous zinc-ion batteries; Cathode; Intercalated reaction; Metallic vanadium trioxide; Phase transformation
• ISSN: 2095-4956
• DOI: 10.1016/j.jechem.2021.02.014

A metallic vanadium trioxide material intercalated with phase transformation has been developed. The material exhibits a high specific capacity, a long-lasting lifespan, and superior rate capability when applied in aqueous zinc-ion batteries. [Display omitted] •ZnxV2O5·nH2O has been prepared through V2O3 intercalated with phase transformation.•The pre-intercalated Zn2+ and H2O synergistically stabilize the host structure.•The designed electrode shows superior electrochemical properties in aqueous ZIBs. Aqueous zinc-ion batteries have broad application prospects due to the eco-friendliness, cost-economy and high safety. However, the scarcity of high-performance cathodes with outstanding rate capability and long lifespan has affected their development. Herein, we report a metallic vanadium trioxide material intercalated with phase transformation as cathode applied in aqueous zinc-ion batteries. It offers satisfactory electrochemical performances with a high specific capacity (435 mAh g−1 at 0.5 A g−1), decent power density (5.23 kW kg−1) and desired energy density (331 Wh kg−1), as well as good cyclability. The superior performance originates from the stable structure and fast Zn2+ diffusion, enabled by the pre-intercalation of Zn2+ and water molecules.