A water-responsive molecule realizes stable Ah-scale Zn–I 2 pouch cells with high Zn utilization

Key Points

• The Zn–I2 pouch cell retains 80% capacity after 1060 cycles, demonstrating excellent stability.
• The study highlights dual charge centers in water enabling effective polyiodide anchoring and Zn2+ solvation.
• Observational analysis of the molecular interactions demonstrates the importance of ectoine in the process.
• This approach may enable more efficient zinc-based batteries, but further evaluation is necessary.