Aqueous Alkaline Zinc–Iodine Battery with Two-Electron Transfer

While many cathode materials have been developed for mild electrolyte-based Zn batteries, the lack of cathode materials hinders the progress of alkaline zinc batteries. Halide iodine, with its copious valence nature and redox possibilities, is considered a promising candidate. However, energetic alkaline iodine redox chemistry is impeded by an alkali-unadapted I2 element cathode and thermodynamically unstable reaction products. Here, we formulated and evaluated an aqueous alkaline Zn–iodine battery with a two-electron transfer employing an organic iodized salt cathode and a Cl–-manipulated electrolyte. The single-step redox reaction of the I–/I+ couple resulted in a high discharge plateau of 1.68 V and a…

• NN
  National Natural Science Foundation of China

  Award: 12204039
• RG
  Research Grants Council, University Grants Committee

  Award: CityU 11304921
• NS
  Natural Science Foundation of Chongqing

  Award: CSTB2022NSCQ-MSX1261
• BN
  Beijing Nova Program

  Award: 20240484554
• SK
  State Key Laboratory of Solidification Processing

  Award: SKLSP202312
• NP
  National Postdoctoral Program for Innovative Talents

  Award: BX2021040
• NK
  National Key Research and Development Program of China

  Award: 2019YFA0705104