A tripartite synergistic optimization strategy for zinc-iodine batteries.

The energy industry has taken notice of zinc-iodine (Zn-I) batteries for their high safety, low cost, and attractive energy density. However, the shuttling of I by-products at cathode electrode and dendrite issues at Zn metal anode result in short cycle lifespan. Here, a tripartite synergistic optimization strategy is proposed, involving a MXene cathode host, a n-butanol electrolyte additive, and the in-situ solid electrolyte interface (SEI) protection.