Sulfonated Lignin Binder Blocks Active Iodine Dissolution and Polyiodide Shuttle Toward Durable Zinc‐Iodine Batteries (Adv. Energy Mater. 8/2025)

Zinc-Iodine Batteries

The sodium lignosulfonate molecule delivers stronger binding/adsorption energies for I₂/I⁻/I₃ ⁻ species, and much lower Gibbs free energies for the sequential iodine reduction reactions, which contributes to block the active iodine dissolution as well as polyiodide shuttle behavior and facilitate the iodine conversion reaction kinetics. In article number 2404814, Zhitong Wang, Xinlong Tian, Xiaodong Shi, and co-workers demonstrate the rational design of binders promotes the practical application of zinc-iodine batteries.