A tripartite synergistic optimization strategy for zinc-iodine batteries

Abstract The energy industry has taken notice of zinc-iodine (Zn-I 2 ) batteries for their high safety, low cost, and attractive energy density. However, the shuttling of I 3 − 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 I 3 − by-products. Meanwhile, the partially dissolved n - butanol additive can work synergistically with MXene to inhibit the shuttling of I 3 − . Besides, the n…

• NN
  National Natural Science Foundation of China

  Awards: 62201369, 52072252
• DO
  Department of Science and Technology of Sichuan Province

  Awards: 2023NSFSC1942, 2024NSFSC0226
• FR
  Fundamental Research Funds for the Central Universities

  Award: YJ2021100