Bottlenecks‐Breaking in Zinc‐Iodine Batteries Toward Practical Implementation: A Review and Perspective

Aqueous zinc–iodine batteries (Zn–I 2 Bs) emerge as promising candidates for grid‐scale energy storage due to their inherent safety, low cost, and environmental benignity. However, their practical deployment is hindered by critical challenges, including severe self‐discharge driven by coupled polyiodide shutting and hydrogen evolution reaction (HER), limited practical energy density constrained by low voltage plateaus and predominantly two‐electron iodine redox, sluggish reaction kinetics from complex iodine species interconversion, and zinc anode instability (dendrites, corrosion, passivation). This work provides a comprehensive analysis of Zn–I 2 B mechanisms, debating the interplay between iodine's layered…

• NN
  National Natural Science Foundation of China

  Award: 52573289
• FR
  Fundamental Research Funds for the Central Universities

  Award: 2412025QG001