We retrospect recent advances in rechargeable aqueous zinc-ion batteries system and the facing challenges of aqueous zinc-ion batteries. Importantly, some concerns and feasible solutions for achieving practical aqueous zinc-ion batteries are discussed in detail.

We report the chemical intercalation of Li ⁺ into the interlayer of V ₂ O ₅ · n H ₂ O with enlarged layer spacing and fast Zn ²⁺ diffusion, resulting in high rate capability and excellent long-term cycling performance.

The fundamentals and perspectives in developing zinc-ion electrolyte have been comprehensively revealed, include the basic characteristics, electrolyte/electrode interfaces, practical consideration and future perspectives.