Heterogeneous particles enhanced derived carbon anode for highly stable aqueous zinc-ion battery

The aqueous Zn ion battery has the advantages of high safety, low cost, and environmental friendliness. However, the dendrite growth and side reactions hinder the practical application. Advanced anode electrode materials are proposed as effective countermeasures but they show poor zinc storage performance. Herein, Ag nanoparticles with different molar ratios were doped on Zn/Co ZIF-L derived carbon by an easy silver mirror reaction. Owing to the good conductivity of silver particles and the interaction of composites, the nucleation over-potential in the Cu||Zn half-cell was reduced. This enables the full cell to maintain a specific discharge capacity of 487.6 mAh g−1 at 0.5 C and 97.6 % coulombic efficiency after long-term cycles for 3000 cycles.