Aqueous zinc-ion batteries (AZIBs) have attracted considerable attention as promising next-generation power sources because of the abundance, low cost, eco-friendliness, and high security of Zn resources. Recently, vanadium-based materials as cathodes in AZIBs have gained interest owing to their rich electrochemical interaction with Zn2+ and high theoretical capacity. However, existing AZIBs are still far from meeting commercial requirements. This article summarizes recent advances in the rational design of vanadium-based materials toward AZIBs. In particular, it highlights various tactics that have been reported to increase the intercalation space, structural stability, and the diffusion ability of the guest Zn2+, as well as explores the structure-dependent electrochemical performance and the corresponding energy storage mechanism. Furthermore, this article summarizes recent achievements in the optimization of aqueous electrolytes and Zn anodes to resolve the issues that remain with Zn anodes, including dendrite formation, passivation, corrosion, and the low coulombic efficiency of plating/stripping. The rationalization of these research findings can guide further investigations in the design of cathode/anode materials and electrolytes for next-generation AZIBs.
Bibliographical noteFunding Information:
This work was supported by the national research foundation of Korea (NRF) grant funded by NanoMaterial Technology Development Program (NRF 2017M3A7B4041987), and the Korea government (MIST) (NRF-2019R1A2C2090443).
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)