biostudies-literatureYan WDepartment of Science and Technology of Sichuan Province (Sichuan Provincial Department of Science and Technology)National Natural Science Foundation of China (National Science Foundation of China)9702https://www.ebi.ac.uk/biostudies/studies/S-EPMC11549484biostudies-literatureUnknown15(1)The energy industry has taken notice of zinc-iodine (Zn-I₂) batteries for their high safety, low cost, and attractive energy density. However, the shuttling of I₃^- 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. The MXene possesses catalytic ability to enhance the reaction kinetics and reduce I₃^- by-products. Meanwhile, the partially dissolved n-butanol additive can work synergistically with MXene to inhibit the shuttling of I₃^-. Besides, the n-butanol and I^-Nature communicationsA tripartite synergistic optimization strategy for zinc-iodine batteries.PMC115494842024NSFSC02262023NSFSC194262201369Liu YQiu JDai CLiang JTan FLin ZZhao JYan WCai XfalseA tripartite synergistic optimization strategy for zinc-iodine batteries.The energy industry has taken notice of zinc-iodine (Zn-I₂) batteries for their high safety, low cost, and attractive energy density. However, the shuttling of I₃^- 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. The MXene possesses catalytic ability to enhance the reaction kinetics and reduce I₃^- by-products. Meanwhile, the partially dissolved n-butanol additive can work synergistically with MXene to inhibit the shuttling of I₃^-. Besides, the n-butanol and I^-2024-01-01T00:00:00Z2024 Nov2025-04-04T18:56:00.573Z2025-04-04T18:56:00.573ZS-EPMC115494843951620310.1038/s41467-024-53800-6