Polarizable Additive with Intermediate Chelation Strength for Stable Aqueous Zinc-Ion Batteries

Abstract

Highlights Design principle of a reliable electrolyte based on chelation strength is proposed for high-performance aqueous batteries. The addition of penta-sodium diethylene-triaminepentaacetic acid salt is effective in dynamically modulating anode/electrolyte interface, inhibiting water-related side reactions, and mitigating dendrite generation on zinc anodes. Symmetrical, Zn||Cu half and Zn||NH4V4O10 full cells using the new electrolyte exhibit improved electrochemical performance.

Keywords

• Aqueous zinc-ion batteries
• Electrolyte additives
• DTPA-Na
• Chelation strength