POS6-1290
Transition Metal Ion Regulated Tannic Acid Based Metal-Phenolic Networks for Engineering a Protective Interphase on Zn Anodes
When and Where
Nov 30, -0001
00:00 - 00:00
Room 301 (Grand Ballroom)
Presenter(s)
Hae Lim Oh (Sungkyunkwan University)
Co-Author(s)
Abstract
Aqueous zinc-ion batteries have emerged as promising next-generation energy storage systems because of their high safety, low cost, and environmental friendliness. However, the practical application of Zn anodes remains limited by interfacial instability. The intrinsically low electrolyte affinity of Zn metal causes non-uniform Zn2+ deposition, accelerating dendrite growth and hydrogen evolution reaction (HER), thereby compromising Zn plating/stripping reversibility. Stable Zn electrochemistry therefore requires simultaneous regulation of Zn2+ deposition and interfacial reactions, as localized current concentration drives dendrite growth, whereas direct Zn-electrolyte contact induces HER and anode corrosion, generating inactive by-products that progressively degrade the interface. To address these challenges, we introduce coordination-engineered metal–phenolic networks (MPNs) as artificial interphase constructed from transition-metal ions and the polyphenolic molecule tannic acid (TA). The intrinsic adhesion of TA enables conformal coating on the Zn surface, while metal–ligand coordination crosslinks the coating layer into a mechanically robust and ion-permeable interphase. Consequently, the hydrophilic MPNs layer homogenizes Zn2+ transport and minimizes direct Zn-electrolyte contact, thereby suppressing dendrite growth, HER, and corrosion. In addition, abundant zincophilic oxygen-containing sites facilitate Zn2+ desolvation and lower the nucleation energy barrier, enabling highly reversible Zn plating/stripping. This study demonstrates the potential of MPNs as multifunctional artificial interphases for stabilizing Zn metal anodes and provides a versatile interfacial engineering strategy for next-generation aqueous metal batteries.
