Pre-intercalation Strategies to Layered Vanadium-based Electrode Materials for Aqueous Zinc Batteries

Aqueous zinc-ion batteries (AZIBs) have become the most potential alternatives to lithium-ion batteries (LIBs) due to their intrinsic safety, convenient operation, and environmentally friendly characteristics. Layered vanadium-based compounds with two-dimensional ion diffusion channels attract extensive attentions as cathodes for AZIBs. However, they usually suffer from dissolution and large volume change during charging/discharging. Recently, the pre-insertion strategy of guest ions or molecules into the host has provided an effective solution. In this review, we first introduce the application and research trends of vanadium-based cathode materials for AZIBs. Then, the interlayer engineering of the pre-intercalation strategy is emphatically summarized. Finally, we propose future challenges for developing high-performance layered vanadium-based electrode materials.

Automated summary

Aqueous zinc-ion batteries (AZIBs) are considered as potential alternatives to lithium-ion batteries (LIBs) due to their safety, convenience, and environmental friendliness. However, the use of vanadium-based compounds as cathodes for AZIBs often leads to dissolution and large volume changes. The pre-insertion strategy of guest ions or molecules provides an effective solution to this problem.