Solvation Regulation and Interfacial Adsorption by Ethanolamine-Based Eutectic Electrolyte Toward Byproducts-Free Zinc Anode

Abstract

Zn metal anode suffers from notorious water-induced parasitic reactions and dendrite growth. This study designs ethanolamine-based hydrated eutectic electrolytes to stabilize Zn anode through coregulating solvation structure and interfacial adsorption. EA interacts with Zn2+ for suppressed H2O and anion (OTf-) coordination, and preferentially anchors on Zn anode. Therefore, superior lifespan of Zn||Zn cells for over 1800 h at 2 mA cm-2/2 mAh cm-2, and enhanced stability of active carbon cathode are obtained.