Issue 10, 2024

Inherited construction of porous zinc hydroxide sulfate layer for stable dendrite-free Zn anode

Abstract

A stable Zn anode for mitigating dendritic growth, corrosion, and byproducts is vital for exhibiting high-performance electrochemical properties in aqueous Zn-ion batteries. An artificial solid/electrolyte interphase is an effective protective strategy for Zn anodes. Herein, a uniform layer of zinc hydroxide sulfate (ZHS) derived in situ from a ZIF-8 membrane was developed on a Zn anode. The ZHS layer inherited a well-ordered structure and porous channels from the ZIF-8 membrane and exhibited high ionic conductivity, low electronic conductivity, and strong interactions with Zn2+ ions, which facilitated the regulation of homogeneous Zn2+ flux and deposition for dendritic inhibition. The strong interactions between H2O molecules and SO42− ions in the ZHS layer could alter the solvation structure of hydrated Zn2+ ions to facilitate the desolvation process, thus mitigating H2O-induced side reactions during Zn plating/stripping processes. The ZHS layer-coated Zn anode exhibited a remarkably long cycling lifespan of over 2800 h at a low current density of 1 mA cm−2 (1 mA h cm−2) and over 1100 h at a high current density of 10 mA cm−2 (5 mA h cm−2). This study provides a facile and feasible strategy to achieve the interfacial stability of Zn anodes for use in rechargeable aqueous Zn-ion batteries.

Graphical abstract: Inherited construction of porous zinc hydroxide sulfate layer for stable dendrite-free Zn anode

Supplementary files

Article information

Article type
Paper
Submitted
16 Feb 2024
Accepted
09 Apr 2024
First published
09 Apr 2024

Energy Environ. Sci., 2024,17, 3409-3418

Inherited construction of porous zinc hydroxide sulfate layer for stable dendrite-free Zn anode

Z. Xiang, Y. Qiu, X. Guo, K. Qi, Z. Xu and B. Y. Xia, Energy Environ. Sci., 2024, 17, 3409 DOI: 10.1039/D4EE00721B

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