Tannic Acid Assisted Metal-chelate Interphase Toward Highly Stable Zn Metal Anodes in Rechargeable Aqueous Zinc-ion Batteries

Overview

Journal Front Chem

Specialty Chemistry

Date 2022 Aug 29

PMID 36034665

Authors

Nan Hu

Hongyu Qin

Xiangyou Chen

Yanping Huang

Jing Xu

Huibing He

Affiliations

Soon will be listed here.

Abstract

Aqueous zinc-ion batteries (AZIBs) have attracted extensive attention because of their eco-friendliness, intrinsic safety, and high theoretical capacity. Nevertheless, the long-standing Zn anode issues such as dendrite growth, hydrogen evolution, and passivation greatly restrict the further development of AZIBs. Herein, a metal-chelate interphase with high Zn affinity is constructed on the Zn metal surface (TA@Zn) via dipping metallic Zn into a tannic acid (TA) solution to address the aforementioned problems. Benefiting from the abundant hydrophilic and zincophilic phenolic hydroxyl groups of TA molecules, the metal-chelate interphase shows strong attraction for Zn ions, guiding uniform zinc deposition as well as decreasing Zn migration barrier. Therefore, the TA@Zn anode displays an extended lifespan of 850 h at 1 mA cm-, 1 mAh cm in the Zn|Zn symmetrical cell, and a high Coulombic efficiency of 96.8% in the Zn|Ti asymmetric cell. Furthermore, the Zn|VO full cell using TA@Zn anode delivers an extremely high capacity retention of 95.9% after 750 cycles at 2 A g-. This simple and effective strategy broadens the interfacial modification scope on Zn metal anodes for advanced rechargeable Zn metal batteries.

Citing Articles

Regulating Zn Ion Desolvation and Deposition Chemistry Toward Durable and Fast Rechargeable Zn Metal Batteries.

Zhou Y, Li G, Feng S, Qin H, Wang Q, Shen F Adv Sci (Weinh). 2022; 10(6):e2205874.

PMID: 36574480 PMC: 9951317. DOI: 10.1002/advs.202205874.

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